CN105100550A - Shadow correction method and device and imaging system - Google Patents
Shadow correction method and device and imaging system Download PDFInfo
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- CN105100550A CN105100550A CN201410160398.5A CN201410160398A CN105100550A CN 105100550 A CN105100550 A CN 105100550A CN 201410160398 A CN201410160398 A CN 201410160398A CN 105100550 A CN105100550 A CN 105100550A
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Abstract
The invention relates to a lens shadow correction method and device and an imaging system. The method is used to correct shadow of images obtained by a lens. The method comprises that color temperature information of a light source corresponding to an image is obtained; a first shadow correction parameter corresponding to the light-source color temperature information is obtained; and the first shadow correction parameter is used to correct shadow of the image. The method can adapt to change of the light source of a scene of the image, so that the imaging system can obtain better shadow correction effect in different light source environments.
Description
Technical field
The present invention relates to image processing field, particularly relate to a kind of shadow correction method and device, imaging system.
Background technology
Camera lens shade (LensShading) is the uneven phenomenon of the brightness of the image caused due to the optical characteristics of camera lens and color, and camera lens shadow correction is exactly removed by the shadow correction produced by optical reasons such as camera lenses in imaging process by certain correcting algorithm.
When the brightness of the image caused by the optical characteristics of camera lens uneven is mainly due to incident light scioptics, stronger at the reflection of lens edge, refraction action, thus cause the phenomenon that the center of image is bright, edge is dark to produce; The uneven refractive index mainly due to the light of different wave length in incident light of color of the image caused by the optical characteristics of camera lens is different, cause the light of different wave length in incident light to drop on the diverse location of sensor devices, thus the phenomenon causing the color of image uneven produce.
In prior art; when carrying out shadow correction to image; usually camera lens shadow correction parameter can first be obtained; the acquisition of described shadow correction parameter can take to a designated light source (as D65 light source) initial pictures that a light source evenly incides camera lens in advance by imaging systems such as cameras; this initial pictures is used to calculate shade calibration parameter; also under may using hybrid light source, captured initial pictures calculates band shadow correction parameter; then, when carrying out image shadow correction, directly according to described shade calibration parameter, image shade is corrected.
The method is difficult to adapt to the different light source change demand of scene, under various different light source, is difficult to reach good shadow correction effect.
Summary of the invention
What the present invention solved is that shadow correction effect under different scene light sources is difficult to ensure, the problem that picture quality is poor.
For solving the problem, technical solution of the present invention provides a kind of shadow correction method, carries out shadow correction for the image obtained camera lens; Comprise:
Obtain the light source color temperature information corresponding with described image;
Obtain the first shadow correction parameter corresponding with described light source color temperature information;
Described first shadow correction parameter is adopted to carry out shadow correction to described image.
Optionally, the first shadow correction parameter that described acquisition is corresponding with described light source color temperature information comprises the corresponding relation searching light source color temperature information and the shadow correction parameter prestored, to determine described first shadow correction parameter.
Optionally, described corresponding relation generates as follows:
Obtain the shadow correction parameter corresponding to multiple exemplary light sources color temperature information respectively;
Based on the shadow correction parameter corresponding to described exemplary light sources color temperature information, set up the corresponding relation of light source color temperature information and shadow correction parameter.
Optionally, the first shadow correction parameter that described acquisition is corresponding with described light source color temperature information comprises:
Determine the exemplary light sources color temperature information with described light source color temperature information matches;
Based on described corresponding relation, determine that with the shadow correction parameter corresponding to the described exemplary light sources color temperature information mated be described first shadow correction parameter.
Optionally, the light source color temperature information that described image is corresponding obtains from Automatic white balance unit.
Optionally, described exemplary light sources comprises at least two kinds in H light source, A light source, TL84 light source, D50 light source, D65 light source, D75 light source.
Technical solution of the present invention also provides a kind of shadow correction device, carries out shadow correction for the image obtained camera lens; Comprise:
Colour temperature acquiring unit, is suitable for obtaining the light source color temperature information corresponding with described image;
Parameter acquiring unit, is suitable for obtaining the first shadow correction parameter corresponding with described light source color temperature information;
Shadow correction unit, is suitable for adopting described first shadow correction parameter to carry out shadow correction to image.
Optionally, described parameter acquiring unit comprises searches subelement, is suitable for the corresponding relation searching light source color temperature information and the shadow correction parameter prestored, to determine described first shadow correction parameter.
Optionally, also comprise: relation generation unit, be suitable for obtaining the shadow correction parameter corresponding to multiple exemplary light sources color temperature information respectively, based on the shadow correction parameter corresponding to described exemplary light sources color temperature information, set up the corresponding relation of light source color temperature information and shadow correction parameter.
Optionally, described parameter acquiring unit also comprises:
Coupling subelement, is suitable for determining the exemplary light sources color temperature information with described light source color temperature information matches;
Determine subelement, be suitable for based on described corresponding relation, determine that with the shadow correction parameter corresponding to the described exemplary light sources color temperature information mated be described first shadow correction parameter.
Optionally, also comprise: pre-storing unit, be suitable for described corresponding relation to be pre-stored within the register of imaging system.
Optionally, described colour temperature acquiring unit is arranged in the Automatic white balance unit of imaging system.
Technical solution of the present invention also provides a kind of imaging system, comprising:
Shadow correction device as above.
Compared with prior art, technical solution of the present invention has the following advantages:
By obtaining the light source color temperature information corresponding with image, and then obtain the first shadow correction parameter corresponding with described light source color temperature information, described first shadow correction parameter is adopted described image to be carried out to the method for shadow correction, described first correction parameter is mated the most with the scene light source at the current place of image, the method can the change of scene light source at adapting to image place, makes imaging system all can obtain good shadow correction effect under various lighting environment.
Further, the method can prestore the corresponding relation of light source color temperature information and shadow correction parameter, then image is being carried out in the process of shadow correction, directly obtain the first shadow correction parameter based on described corresponding relation, method is simple, effective, improve the speed of shadow correction process, improve system effectiveness.
Image is being carried out in the process of shadow correction, directly can obtain the light source color temperature information in Automatic white balance unit, effectively can reduce computation complexity, improving the speed of shadow correction process.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the shadow correction method that technical solution of the present invention provides;
Fig. 2 is the schematic flow sheet setting up the corresponding relation between light source color temperature information and shadow correction parameter that the embodiment of the present invention provides;
Fig. 3 is schematic flow sheet image being carried out to shadow correction that the embodiment of the present invention provides;
Fig. 4 is the schematic diagram of the light source color temperature information that obtains from Automatic white balance unit that the embodiment of the present invention provides;
Fig. 5 is the structural representation of the shadow correction device that the embodiment of the present invention provides.
Embodiment
In prior art, based on imaging systems such as cameras in advance to the image of the incident camera lens of designated light source shooting uniform light, or image captured under hybrid light source obtains shade calibration parameter in advance, then, when carrying out image shadow correction, described shade calibration parameter is used to correct image shade.
But the shadow correction demand of the image that the method obtains under being difficult to adapt to different scene light sources, particularly for the shadow correction demand that the color of image is uneven, generation due to the color non-uniform phenomenon of image is relevant with the wavelength of light source, namely relevant with the concrete light source of the imaging scene of imaging system, so when using the shadow correction parameter obtained based on designated light source or hybrid light source as above to carry out shadow correction, be difficult to obtain good shadow correction effect.
For solving the problem, technical solution of the present invention provides a kind of shadow correction method.
Fig. 1 is the schematic flow sheet of the camera lens shadow correction method that technical solution of the present invention provides, and as shown in Figure 1, first performs step S1, obtains the light source color temperature information corresponding with image.
Because the scene light source of imaging system has larger impact for the imaging effect of image, so the shadow correction effect in order to obtain good image, first obtain light source color temperature information corresponding to present image.
The light source color temperature information that described image is corresponding can adopt multiple method to obtain, the light source color temperature information of image such as can be obtained from the Automatic white balance processing unit of imaging system, also can based on the light source color temperature information of the light source color temperature information determination present image of the image gathered before imaging system, also can adopt other various software in prior art, light source color temperature information corresponding to hardware approach determination image, be not specifically limited at this.
Perform step S2, obtain the first shadow correction parameter corresponding with described light source color temperature information.
In present specification, image is being carried out in the process of shadow correction, for different light source color temperature information, different shadow correction parameters can be obtained accordingly, the shadow correction parameter corresponding with described light source color temperature information is called the first shadow correction parameter.
First shadow correction parameter corresponding to described light source color temperature information can be obtained by the corresponding relation of light source color temperature information and shadow correction parameter, such as, can obtain by experiment in advance under different light source color temperature information, the shadow correction parameter obtained respectively, namely can set up the corresponding relation between light source color temperature information and shadow correction parameter by experiment.Also the corresponding relation can determining between light source color temperature information and shadow correction parameter according to real image process experience etc.
Can described corresponding relation be prestored in imaging systems, then in shadow correction processing procedure, after obtaining light source color temperature information corresponding to image, by searching the corresponding relation of light source color temperature information and the shadow correction parameter prestored, just the shadow correction parameter corresponding with described light source color temperature information can be determined, i.e. described first shadow correction parameter.
Perform step S3, adopt described first shadow correction parameter to carry out shadow correction to described image.
Obtaining the light source color temperature information corresponding to image, and and then get with the first correction parameter corresponding to described light source color temperature information after, namely described first shadow correction parameter can be adopted to carry out shadow correction to this image, concrete shadow correction process is well known to those skilled in the art, and does not do concrete describing at this.
In the method, adopt the first shadow correction parameter corresponding with described light source color temperature information to carry out shadow correction to image, the light source information corresponding to described first shadow correction parameter and image matches, so can obtain good shadow correction effect.The method can the change of scene light source at adapting to image place, makes imaging system all can obtain good shadow correction effect under various lighting environment.
For enabling above-mentioned purpose of the present invention, feature and advantage more become apparent, and are described in detail specific embodiments of the invention below in conjunction with accompanying drawing.
In the present embodiment, multiple shadow correction parameter corresponding to typical colour temperature light source color temperature information can be obtained in advance, set up the corresponding relation of light source color temperature information and shadow correction parameter based on this and store.Before online shadow correction is carried out to the image of shooting, first based on the light source color temperature information estimated in Automatic white balance unit, judge that whether the lighting source of current scene is the light source in the exemplary light sources stored, if it is corresponding shadow correction coefficient can be adopted to correct, light source in the exemplary light sources stored, then can find the exemplary light sources color temperature information of coupling, and then obtain the shadow correction parameter of the exemplary light sources color temperature information corresponding to described coupling.
Can obtain the corresponding relation between light source color temperature information and shadow correction parameter by experiment, Fig. 2 is the schematic flow sheet setting up the corresponding relation between light source color temperature information and shadow correction parameter that the present embodiment provides.
As shown in Figure 2, first perform step S201, obtain the image that uniform light under multiple exemplary light sources incides camera lens respectively.
Described exemplary light sources can be H light source, A light source, TL84 light source, D50 light source, D65 light source and D75 light source etc.
In this step, respectively under each exemplary light sources above-mentioned, use imaging system to be calibrated facing to light source machine, shooting uniform light incides the image of camera lens, then correspond to each exemplary light sources and correspondingly can obtain image.
In the present embodiment, adopt above-mentioned exemplary light sources, in other embodiments, also can adopt other exemplary light sources, number and the type of exemplary light sources do not limit at this.
Perform step S202, calculate the shadow correction parameter corresponding to each image respectively.
The method of the shadow correction parameter corresponding to computed image can adopt the multiple method of prior art.
Due to the principle of camera lens shadow correction be find out picture pixel corresponding to shadow correction parameter, in the prior art, the yield value of this pixel that the method obtaining shadow correction parameter normally calculates to the distance of central pixel point based on pixel, and then determine the shadow correction parameter corresponding to this pixel.
Such as image can be divided into the grid of M × N, for the pixel on grid, the yield value on grid corresponding to each pixel is obtained according to the calculated for pixel values of each pixel on the pixel value of grid central pixel point and grid, using this yield value namely as the shadow correction parameter corresponding to each pixel, the shadow correction parameter on grid corresponding to all pixels can be obtained thus.In shadow correction process, shadow correction parameter is obtained for the ease of follow-up, can after calculating the shadow correction parameter on grid corresponding to each pixel, set up the look-up table of the position of pixel on grid and the corresponding relation of shadow correction parameter, then when carrying out shadow correction to image, directly can obtain the shadow correction parameter of each pixel on corresponding grid based on described look-up table.
Image accessed by camera lens is incided for uniform light under each exemplary light sources, adopts said method, correspondence can obtain a corresponding look-up table.
Perform step S203, set up the corresponding relation of light source color temperature information and shadow correction parameter.
Due to for the image obtained under each exemplary light sources, all corresponding shadow correction parameter obtained corresponding to image, namely each exemplary light sources is to the shadow correction parameter that should have this light source.
Colour temperature due to each exemplary light sources is different, and such as, the colour temperature of H light source is 2300K(Kelvin), the colour temperature of A light source is 2856K, the colour temperature of the colour temperature of TL84 light source to be the colour temperature of 4000K, D50 light source be 5000K, D65 light source is 6500K and the colour temperature of D75 light source is 7500K.
After the shadow correction parameter corresponding to the image obtaining taking under each exemplary light sources, then the corresponding relation between shadow correction parameter corresponding under can setting up each exemplary light sources colour temperature and this exemplary light sources accordingly.For example, if the shadow correction parameter corresponding to picture captured under D65 light source is designated as shadow correction parameter A, then because the colour temperature of D65 light source is 6500K, then can set up light source color temperature is corresponding relation between 6500K and shadow correction parameter A, by that analogy, shadow correction parameter corresponding with it can be obtained corresponding to above-mentioned each exemplary light sources colour temperature, set up the corresponding relation of light source color temperature information and shadow correction parameter with this.
The corresponding relation between the exemplary light sources colour temperature shadow correction parameter corresponding with it is included in above-mentioned corresponding relation, then corresponding any light source colour temperature, when obtaining the shadow correction parameter corresponding to it, first the exemplary light sources with described light source color temperature information matches can be determined, such as, if described light source color temperature is close to D65 light source color temperature, then using exemplary light sources that D65 mates as it, and the shadow correction parameter corresponding to D65 light source color temperature is as the shadow correction parameter corresponding to this light source color temperature, namely as the first shadow correction parameter corresponding with this light source color temperature information.For arbitrary light source, the light source color temperature information of mating with it can be obtained, obtain the first shadow correction parameter corresponding with its light source color temperature information, namely set up the corresponding relation of light source color temperature information and shadow correction parameter.
In the present embodiment, the corresponding relation of described light source color temperature information and shadow correction parameter can be stored in advance, then imaging system take under any light source obtain image time, the the first shadow correction parameter corresponding to this light source information can be obtained based on the corresponding relation prestored, and then based on this parameter, shadow correction is carried out to image.
Obtain the first shadow correction parameter of corresponding light source information based on the corresponding relation prestored, and and then the process of shadow correction is carried out as shown in Figure 3 to image.
When carrying out shadow correction to the image captured by imaging system, first need to obtain and the light source color temperature information corresponding to this image, in the present embodiment, consider when imaging system works, Automatic white balance unit in imaging system can be estimated to obtain light source color temperature information according to photographed scene, for calculating Automatic white balance parameter, so in the process of carrying out shadow correction process, can directly obtain from Automatic white balance unit and the current captured light source color temperature information corresponding to image.
Namely first perform step S301, from Automatic white balance unit, obtain the light source color temperature information corresponding with image.
Usual imaging system is in the process processed image, as shown in Figure 4, pending image can carry out shadow correction process through shadow correction unit U10, Automatic white balance process is carried out again afterwards through Automatic white balance unit U20, due in the process of Automatic white balance process, can be estimated light source color temperature by colour temperature acquiring unit U201, namely the light source color temperature information corresponding to image can be obtained from Automatic white balance unit U20, so in the present embodiment, the light source color temperature information obtained in Automatic white balance unit U20 can be used as the light source color temperature information corresponding to image in the process of by shadow correction unit U10 pending image being carried out to shadow correction process.
Because usual imaging system is in the process processed image, first can carry out shadow correction process to pending image, carry out Automatic white balance process etc. more afterwards, so imaging system obtain for the first time pending image carry out shadow correction process time, now also cannot obtain current light source color temperature information from Automatic white balance unit, can an initial shadow correction parameter given in advance, such as compromise can get shadow correction parameter corresponding to D65 colour temperature as initial shadow correction parameter, afterwards, image is carried out in the process of shadow correction process follow-up, can using the light source color temperature information that obtains in the white balance processing unit of imaging system as the light source color temperature information corresponding to present image.
Perform step S302, determine the exemplary light sources color temperature information that the light source color temperature information corresponding with described image is mated.
Because usual imaging system can carry out imaging under exemplary light sources, so the light source color temperature information obtained from Automatic white balance unit, usually also can be a kind of color temperature information of exemplary light sources, such as, if the light source color temperature information obtained is 6500K, then correspondingly can determine that the exemplary light sources of mating with this light source color temperature information is D65 light source.
If the light source color temperature information that the image obtained is corresponding is not any one exemplary light sources in H light source as above, A light source etc., then the color temperature information of obtained light source color temperature information and each exemplary light sources can be compared, obtain based on close or similar relation the exemplary light sources that light source color temperature information corresponding to image mates.Those skilled in the art, also can other means, and obtain the exemplary light sources that light source color temperature information corresponding to image is mated, concrete grammar does not limit.
Perform step S303, based on the corresponding relation of light source color temperature information and shadow correction parameter, determine that with the shadow correction parameter corresponding to the described exemplary light sources color temperature information mated be the first shadow correction parameter.
Due to based on step S201 to step S203, the corresponding relation of light source color temperature information and shadow correction parameter can be obtained in advance, the exemplary light sources determining light source color temperature information corresponding to image and mate, then by searching described corresponding relation, find in corresponding relation and the shadow correction parameter corresponding to the described exemplary light sources color temperature information mated, in subsequent step, namely can using the shadow correction parameter of this shadow correction parameter as the light source information of corresponding current imaging systems, namely using this shadow correction parameter as the first shadow correction parameter.
Perform step S304, adopt described first shadow correction parameter to carry out shadow correction to described image.
When carrying out shadow correction to image, directly shadow correction can be carried out based on described first shadow correction parameter to each pixel in image.
For example, if described first shadow correction parameter is the shadow correction parameter obtained based on the grid that image is divided into M × N, then for needing the image carrying out shadow correction, also this image can be divided into the grid of M × N, if the pixel in image just drops on grid, the shadow correction parameter corresponding to this pixel position then directly can be obtained from shadow correction parameter, if the pixel in image does not drop on grid, the shadow correction parameter of this point then can be determined based on the shadow correction parameter corresponding to the pixel being on grid of this pixel periphery, such as can utilize the contiguous shadow correction parameter corresponding to four grids, the interpolation such as the method for bilinear interpolation are used to obtain the correction parameter of this point.
After obtaining the shadow correction parameter corresponding to pixel, the shadow correction for image is realized by the shadow correction parameter corresponding to each point, such as, the pixel value after this shadow correction can be obtained by the pixel value of each pixel shadow correction parameter be multiplied by corresponding to this point.
So far the shadow correction process for image is completed.
The method of the shadow correction that the present embodiment provides, makes described first shadow correction parameter mate the most with the scene light source at the current place of image.
Whether described first shadow correction parameter mates with the scene light source at the current place of image has larger impact to the quality of image.Such as, for the image that the even hawk of shooting obtains, when shadow correction parameter is not mated with the scene light source at image place, take the image that even hawk obtains and can obviously see coloured halation, very large on picture quality impact, and when shadow correction parameter is mated with the scene light source at image place, take image that even hawk obtains and there is no and effectively can improve the quality of image by colored halation as above.
The method that the present embodiment provides can obtain good shadow correction effect, can the change of scene light source at adapting to image place, makes imaging system all can obtain good shadow correction effect under various lighting environment.
Further, prestore the corresponding relation of light source color temperature information and shadow correction parameter, then image is being carried out in the process of shadow correction, directly obtain the first shadow correction parameter based on described corresponding relation, method is simple, effectively, the speed of raising shadow correction process, improves system effectiveness.
Image is being carried out in the process of shadow correction, directly obtaining the light source color temperature information obtained in white balance processing unit, do not increase technical costs, effectively reduce computation complexity, improving the speed of shadow correction process.
Corresponding to above-mentioned shadow correction method, the embodiment of the present invention also provides a kind of shadow correction device, and as shown in Figure 5, described device comprises colour temperature acquiring unit U201, parameter acquiring unit U30 and shadow correction unit U10.
Described colour temperature acquiring unit U201, is suitable for obtaining the light source color temperature information corresponding with described image; Described parameter acquiring unit U30, is suitable for obtaining the first shadow correction parameter corresponding with described light source color temperature information; Described shadow correction unit U10, is suitable for adopting described first shadow correction parameter to carry out shadow correction to image.
Described colour temperature acquiring unit U201 can be arranged in the white balance processing unit of imaging system, in Automatic white balance processing unit U20 as shown in Figure 4.
Described parameter acquiring unit U30 comprises and searches subelement U301, is suitable for the corresponding relation searching light source color temperature information and the shadow correction parameter prestored, to determine described first shadow correction parameter.
Described parameter acquiring unit U30 also comprises coupling subelement U302 and determines subelement U303.
Described coupling subelement U302, is suitable for determining the exemplary light sources with described light source color temperature information matches;
Describedly determine subelement U303, be suitable for based on described corresponding relation, determine with the shadow correction parameter corresponding to the color temperature information of described exemplary light sources of mating to be described first shadow correction parameter.
Described device also comprises relation generation unit U40, is suitable for obtaining respectively the correction parameter for shadow correction under multiple exemplary light sources, sets up the color temperature information of light source and the corresponding relation of shadow correction parameter.
Described device also comprises: pre-storing unit U50, is suitable for described corresponding relation to be pre-stored within the register of imaging system.
Although the present invention discloses as above, the present invention is not defined in this.Any those skilled in the art, without departing from the spirit and scope of the present invention, all can make various changes or modifications, and therefore protection scope of the present invention should be as the criterion with claim limited range.
Claims (13)
1. a shadow correction method, carries out shadow correction for the image obtained camera lens; It is characterized in that, comprising:
Obtain the light source color temperature information corresponding with described image;
Obtain the first shadow correction parameter corresponding with described light source color temperature information;
Described first shadow correction parameter is adopted to carry out shadow correction to described image.
2. shadow correction method as claimed in claim 1, it is characterized in that, the described acquisition first shadow correction parameter corresponding with described light source color temperature information comprises the corresponding relation searching light source color temperature information and the shadow correction parameter prestored, to determine described first shadow correction parameter.
3. shadow correction method as claimed in claim 2, it is characterized in that, described corresponding relation generates as follows:
Obtain the shadow correction parameter corresponding to multiple exemplary light sources color temperature information respectively;
Based on the shadow correction parameter corresponding to described exemplary light sources color temperature information, set up the corresponding relation of light source color temperature information and shadow correction parameter.
4. shadow correction method as claimed in claim 3, is characterized in that, the described acquisition first shadow correction parameter corresponding with described light source color temperature information comprises:
Determine the exemplary light sources color temperature information with described light source color temperature information matches;
Based on described corresponding relation, determine that with the shadow correction parameter corresponding to the described exemplary light sources color temperature information mated be described first shadow correction parameter.
5. shadow correction method as claimed in claim 1, it is characterized in that, the light source color temperature information that described image is corresponding obtains from Automatic white balance unit.
6. shadow correction method as claimed in claim 3, it is characterized in that, described exemplary light sources comprises at least two kinds in H light source, A light source, TL84 light source, D50 light source, D65 light source, D75 light source.
7. a shadow correction device, carries out shadow correction for the image obtained camera lens; It is characterized in that, comprising:
Colour temperature acquiring unit, is suitable for obtaining the light source color temperature information corresponding with described image;
Parameter acquiring unit, is suitable for obtaining the first shadow correction parameter corresponding with described light source color temperature information;
Shadow correction unit, is suitable for adopting described first shadow correction parameter to carry out shadow correction to image.
8. shadow correction device as claimed in claim 7, it is characterized in that, described parameter acquiring unit comprises searches subelement, is suitable for the corresponding relation searching light source color temperature information and the shadow correction parameter prestored, to determine described first shadow correction parameter.
9. shadow correction device as claimed in claim 8, it is characterized in that, also comprise: relation generation unit, be suitable for obtaining the shadow correction parameter corresponding to multiple exemplary light sources color temperature information respectively, based on the shadow correction parameter corresponding to described exemplary light sources color temperature information, set up the corresponding relation of light source color temperature information and shadow correction parameter.
10. shadow correction device as claimed in claim 9, it is characterized in that, described parameter acquiring unit also comprises:
Coupling subelement, is suitable for determining the exemplary light sources color temperature information with described light source color temperature information matches;
Determine subelement, be suitable for based on described corresponding relation, determine that with the shadow correction parameter corresponding to the described exemplary light sources color temperature information mated be described first shadow correction parameter.
11. shadow correction devices as claimed in claim 8, is characterized in that, also comprise: pre-storing unit, are suitable for described corresponding relation to be pre-stored within the register of imaging system.
12. shadow correction devices as claimed in claim 7, it is characterized in that, described colour temperature acquiring unit is arranged in the Automatic white balance unit of imaging system.
13. 1 kinds of imaging systems, is characterized in that, comprising:
Shadow correction device as described in any one of claim 7 to 12.
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| CN105933686A (en) * | 2016-05-19 | 2016-09-07 | 浙江大学 | Method for correcting color lens shadow of digital camera with adaptive light source |
| CN106921837A (en) * | 2015-12-25 | 2017-07-04 | 北京展讯高科通信技术有限公司 | Camera module group lens shadow compensating method and device, image-signal processor |
| CN107071234A (en) * | 2017-01-23 | 2017-08-18 | 上海兴芯微电子科技有限公司 | A kind of camera lens shadow correction method and device |
| CN107846583A (en) * | 2017-10-27 | 2018-03-27 | 维沃移动通信有限公司 | A kind of image shadow compensating method and mobile terminal |
| CN111385438A (en) * | 2018-12-28 | 2020-07-07 | 展讯通信（上海）有限公司 | Compensating method and device for lens shading correction and computer readable storage medium |
| CN111556228A (en) * | 2020-05-15 | 2020-08-18 | 展讯通信（上海）有限公司 | Method and system for correcting lens shadow |
| CN113132695A (en) * | 2021-04-21 | 2021-07-16 | 维沃移动通信有限公司 | Lens shadow correction method and device and electronic equipment |
| CN113132562A (en) * | 2021-04-21 | 2021-07-16 | 维沃移动通信有限公司 | Lens shadow correction method and device and electronic equipment |
| CN113905218A (en) * | 2021-05-25 | 2022-01-07 | 荣耀终端有限公司 | A color shading correction method and electronic device |
| CN114926364A (en) * | 2022-05-31 | 2022-08-19 | 影石创新科技股份有限公司 | Image correction method, image correction device, computer equipment and storage medium |
| US12273662B2 (en) | 2020-01-15 | 2025-04-08 | Huawei Technologies Co., Ltd. | Image processing method and apparatus, terminal, and storage medium |
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