CN111601417A - Shadow effect restoration method - Google Patents
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Abstract
The invention belongs to the field of photography, and relates to a light and shadow effect restoration method, which comprises the following steps: recording the shadow effect: recording an environment light and shadow effect by adopting camera equipment, acquiring image data in the process of recording the light and shadow effect, extracting the light and shadow effect data in the image data and storing the light and shadow effect data as original light and shadow effect data; acquiring a shadow effect file: converting the original light and shadow effect data into a light and shadow effect file recording the light and shadow effect data to be restored, and storing the light and shadow effect file; reducing the shadow effect: and transmitting the shadow effect file to the LED lighting equipment, and restoring and playing the shadow effect by the LED lighting equipment according to the shadow effect data to be restored recorded in the shadow effect file to illuminate. The technical scheme of the invention solves the problems that the lighting effect of the LED lighting equipment is single in lighting effect and the operation of the LED lighting equipment is complex when the same lighting effect and lighting are realized in different application scenes in the prior art.
Description
Technical Field
The invention belongs to the technical field of photography, and particularly relates to a light and shadow effect restoration method.
Background
Most of LED lighting equipment on the market is internally provided with system light and shadow effect data, the realization principle of the light and shadow effect data is realized by digitalizing power supply square waves according to Pulse Width control dimming (PWM for short) and controlling the duty ratio of the square waves so as to control the change of current to control the light change of an LED lamp, and then controlling the brightness, the color temperature and the time of the LED lamp according to the PWM principle by a software built-in timer. Therefore, in the prior art, the lighting effect programming is built in the LED lighting device to realize lighting with the lighting effect, so that the lighting with the lighting effect of the LED lamp can only work in the LED lighting device, and one set of LED lighting device can only realize one lighting effect, and the lighting effect with the lighting effect is single. In addition, if the same light and shadow effect is used in other application scenes, the LED lighting equipment needs to be installed on site and the light and shadow effect programming is carried out, so that the operation is complex.
Disclosure of Invention
The invention aims to provide a light and shadow effect restoration method, and aims to solve the problems that in the prior art, the lighting effect of the light and shadow effect of LED lighting equipment is single, and the operation of the LED lighting equipment is complex when the same light and shadow effect is realized in different application scenes.
In order to achieve the purpose, the invention adopts the technical scheme that: a shadow effect restoration method comprises the following steps:
recording the shadow effect: recording an environment light and shadow effect by adopting camera equipment, acquiring image data in the process of recording the light and shadow effect, extracting the light and shadow effect data in the image data and storing the light and shadow effect data as original light and shadow effect data;
acquiring a shadow effect file: converting the original light and shadow effect data into a light and shadow effect file recording the light and shadow effect data to be restored, and storing the light and shadow effect file;
reducing the shadow effect: and transmitting the shadow effect file to the LED lighting equipment, and restoring and playing the shadow effect by the LED lighting equipment according to the shadow effect data to be restored recorded in the shadow effect file to illuminate.
Further, in the process of recording the shadow effect, the shadow effect is recorded based on a mobile phone, the camera device is a mobile phone camera, and the frame rate of the mobile phone camera recording the ambient shadow effect is less than or equal to 960 frames/second.
Further, in the process of recording the environmental light and shadow effect, the mobile phone camera records the environmental light and shadow effect at a rate of 60 frames per second.
Further, in the step of recording the shadow effect, the method further comprises the following steps:
frame loss processing: in the process of recording the environmental light and shadow effect, before the light and shadow effect data in the image data are extracted and stored as the original light and shadow effect data, real-time detection is carried out on each frame of recorded image data, when the loss of certain frame of image data is detected, the previous frame of image data is filled to the position of the lost frame of image data and stored as the original light and shadow effect data, and when no loss of the image data is detected, the previous frame of image data is directly stored as the original light and shadow effect data.
Further, in the step of recording the light and shadow effect, when the environment light and shadow effect is recorded based on the mobile phone camera, the flash lamp of the mobile phone is turned off so as to truly record the obtained environment light and shadow effect.
Further, in the process of extracting the light and shadow effect data in the image data and storing the light and shadow effect data as the original light and shadow effect data, the light and shadow effect data comprises ambient light intensity data, ambient light color data and ambient light color temperature data, and the ambient light intensity data, the ambient light color data and the ambient light color temperature data are coupled with each other to present the light and shadow effect of the scene picture corresponding to the ambient light and shadow effect.
Further, in the process of extracting and storing the shadow effect data in the image data as the original shadow effect data, the ambient light color data in the shadow effect data takes the average hue displayed in the image data and converts the average hue into the color data of the shadow effect data to be restored recorded in the shadow effect file, and the color data of the shadow effect data to be restored satisfies the following conditions:
converting the image data into a shadow effect picture, and acquiring primary color values of all pixel points in the shadow effect picture: rm、Gm、BmThe color data of the shadow effect data to be restored recorded in the shadow effect file obtained by converting corresponding each shadow effect picture is,
Rflat plate＝(R1+R2+R3+···+Rm-1+Rm)/m，
GFlat plate＝(G1+G2+G3+···+Gm-1+Gm)/m，
BFlat plate＝(B1+B2+B3+···+Bm-1+Bm)/m，
Wherein m is the number of pixel points in each shadow effect picture, RmRepresenting the value of the red primary color, R, in a pixelFlat plateRepresenting the average value of the primary color values of red, GmIndicating the value of the primary color of green, G, in a pixelFlat plateRepresenting the average value of the primary color values of green, BmRepresenting the value of the blue primary color, B, in a certain pixelFlat plateRepresents the average value of the blue primary color values.
Further, in the process of extracting the light and shadow effect data in the image data and storing the light and shadow effect data as original light and shadow effect data, the image data is converted into a light and shadow effect picture, in the process of extracting the light and shadow effect data in the light and shadow effect picture, the ambient light intensity data of each light and shadow effect picture meets the following requirements:
K＝bmax 2/1000，L＝bn 2/K，
where K is the conversion ratio, bmaxFor the maximum intensity value in all image data, bnAnd the value range of the final light intensity value L is that L is not less than 0cd and not more than 1000 cd.
Further, in the process of transmitting the light and shadow effect file to the LED lighting equipment, the mobile phone transmits the file data of the light and shadow effect file to the LED lighting equipment based on a Bluetooth transmission mode of a Bluetooth transmission protocol linked between the mobile phone and the LED lighting equipment.
Further, the shadow effect file is a Binary file recording shadow effect data to be restored, and the Binary file is generated based on a CCT mode or an HSI mode.
The invention has at least the following beneficial effects:
the method for restoring the light and shadow effect breaks through the traditional mode that the existing light and shadow effect programming is built in the LED equipment, the LED lighting equipment which is built with the programming of the required scene light and shadow effect is not needed to be carried, only the storage equipment capable of communicating and transmitting data is needed to be used, and the LED lighting equipment is adopted on site, so that the lighting effect of the required scene light and shadow effect can be obtained. Moreover, as long as the LED lighting equipment is installed on site, the light and shadow effect files with different scene light and shadow effects can be transmitted to the LED lighting equipment as required, the required scene light and shadow effects can be restored and obtained, and the defect of single light and shadow effect of the traditional LED lighting equipment is overcome.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a block diagram illustrating steps of a shadow effect reduction method according to a first embodiment of the present invention;
FIG. 2 is a block diagram illustrating steps of a shadow effect reduction method according to a second embodiment of the present invention;
fig. 3 is a flowchart of a light and shadow effect restoration method according to a second embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1, in the first embodiment of the present invention, a light and shadow effect restoration method is provided, and in the first embodiment, the light and shadow effect restoration method includes three steps, specifically, recording the light and shadow effect first (i.e., step S10), and it is understood that the light and shadow effect may be a light effect of a scene such as a burning flame, a warning light, a firework, a breathing light, a welding or a lightning. Next, a shadow effect file is acquired (i.e., step S20), and finally, a reduction shadow effect is performed (i.e., step S30). In the operation process of implementing the reduction shadow effect, the recording shadow effect is as follows: the method comprises the steps of recording an environment light and shadow effect by adopting a camera device, obtaining image data in the process of recording the light and shadow effect, converting the image data into a light and shadow effect picture, extracting the light and shadow effect data recorded in the light and shadow effect picture and saving the light and shadow effect data as original light and shadow effect data, namely forming a Json (Java Script object Notation) file. Of course, the recorded image data stored in advance may also be acquired from the local memory or the remote server, and the light and shadow effect data in the image data may be extracted. The light and shadow effect file is obtained as follows: and converting the light and shadow effect data into a light and shadow effect file (Binary file), recording the light and shadow effect data to be restored by the light and shadow effect file, and storing the light and shadow effect file. The effect of reducing light and shadow is as follows: and transmitting the shadow effect file to the LED lighting equipment, and restoring and playing the shadow effect by the LED lighting equipment according to the shadow effect data to be restored recorded in the shadow effect file for illumination.
The method for restoring the light and shadow effect provided by the invention is adopted to restore the light and shadow effect of the scene, the camera shooting equipment can record the light and shadow effect of the scene picture of interest at any time and any place, then a light and shadow effect file is generated and stored, when the recorded light and shadow effect of the scene picture needs to be restored, the stored light and shadow effect file is transmitted to the LED lighting equipment, and the light and shadow effect of the scene picture at the time of recording can be restored and played through the LED lighting equipment. Therefore, the shadow effect restoration method breaks through the traditional mode that the existing shadow effect programming is built in the LED equipment, the LED lighting equipment which is built with the programming of the required scene shadow effect is not required to be carried, only the storage equipment which can be used for communicating and transmitting data is required to be used, and the LED lighting equipment is adopted on site, so that the lighting effect of the shadow effect of the required scene picture can be obtained. Moreover, as long as the LED lighting equipment is installed on site, the light and shadow effect files of the light and shadow effects of different scene pictures can be transmitted to the LED lighting equipment as required, the light and shadow effects of the required scene pictures can be restored and obtained, and the defect of single light and shadow effect of the traditional LED lighting equipment is overcome.
In the first embodiment, in the process of recording the shadow effect, the shadow effect of the scene picture is recorded based on the mobile phone, that is, the camera device is a mobile phone camera, at this time, the shadow effect restoration method is designed and programmed as an App (Application, mobile phone Application software) used by the mobile phone, and the App is installed in a mobile phone running system, so that the shadow effect restoration method can be conveniently used to record the interested field shadow effect anytime and anywhere and obtain a shadow effect file. And the environment light and shadow effect is recorded at the rate of 960 frames per second or less, and for a high-end mobile phone with high configuration degree of hardware and software configuration, the high-end mobile phone can bear a high recording frame number rate, and the higher the recording frame number rate is, the better the fidelity effect of the final reduction light effect is, and the higher the reduction degree is. Preferably, the ambient lighting effect is recorded at a rate of 60 frames per second, so as to adapt to the cameras of most smart phones, so that the App is suitable for the phones configured at low end, medium end and high end, and the application range can almost cover all smart phones.
In the process of recording the shadow effect, when the mobile phone camera is used for recording the environment shadow effect, the flash lamp of the mobile phone needs to be turned off, so that the influence of the flash lamp of the mobile phone on the shadow effect of the scene picture at the site is avoided, the finally played restored scene shadow effect is closer to the shadow effect of the scene picture at the time, and the obtained environment shadow effect is recorded in a fidelity manner to the maximum extent.
In the process of extracting the shadow effect in the image data and storing the shadow effect as original shadow effect data, the shadow effect data comprises ambient light intensity data, ambient light color data and ambient light color temperature data. Specifically, in the process of extracting and storing the light and shadow effect data in the image data as the original light and shadow effect data, the image data is firstly converted into a light and shadow effect picture, wherein the ambient light color data in the light and shadow effect data is used for obtaining the light and shadow effect pictureThe displayed average hue is converted into color data in a shadow effect file, and satisfies: acquiring primary color values of all pixel points in the shadow effect picture: rm、Gm、BmThen, the color data in the shadow effect file obtained by converting corresponding to each shadow effect picture is,
Rflat plate＝(R1+R2+R3+···+Rm-1+Rm)/m，
GFlat plate＝(G1+G2+G3+···+Gm-1+Gm)/m，
BFlat plate＝(B1+B2+B3+···+Bm-1+Bm)/m，
Wherein m is the number of pixel points in each shadow effect picture, RmRepresenting the value of the red primary color, R, in a pixelFlat plateRepresenting the average value of the primary color values of red, GmIndicating the value of the primary color of green, G, in a pixelFlat plateRepresenting the average value of the primary color values of green, BmRepresenting the value of the blue primary color, B, in a certain pixelFlat plateRepresents an average value of the primary color values of blue;
and, in the shadow effect data in the extraction shadow effect picture process, ambient light intensity data satisfies:
K＝bmax 2/1000，L＝bn 2/K，
where K is the conversion ratio, bmaxFor the maximum intensity value in all image data, bnIn the process of calculating the algorithm, when L is less than 20, the final value is L ═ 0, when L is greater than 1000, the final value is L ═ 1000, and when L is greater than 1000, the final value is L ═ 1000. Thus, based on the calculated ambient light intensity data,The ambient light color data and the ambient light color temperature data are coupled with each other, so that a light and shadow effect of a scene picture corresponding to the shot ambient light and shadow effect can be presented, and then the light and shadow effect data are stored as original light and shadow effect data.
The shadow effect file is a Binary file (an abbreviation of a file format Binary, a file with a suffix name of ". bin") recording shadow effect data to be restored.
In the programmed App, a Binary file can be generated according to two modes, namely, a CCT (Correlated Color Temperature) mode and an HSI (H is an abbreviation of Hue, S is an abbreviation of Saturation, and I is an abbreviation of Intensity, and brightness), namely, the Binary file is generated based on the CCT mode or the HSI mode.
Further, in the process of transmitting the light and shadow effect file to the LED lighting equipment, the Bluetooth transmission mode based on the Bluetooth transmission protocol linked with the mobile phone and the LED lighting equipment adopts the convenient and fast Bluetooth transmission mode to transmit the file data of the light and shadow effect file to the LED lighting equipment, so that the operation of data transmission is simple, and the method is suitable for wide crowds.
As shown in fig. 2, in the method for restoring a light and shadow effect according to the second embodiment of the present invention, in the step of recording the light and shadow effect, the method further includes the following steps: a frame loss processing step (i.e., step S11). Specifically, the frame loss processing is as follows: in the process of recording the environmental light and shadow effect, before extracting the light and shadow effect data of the light and shadow effect picture converted from the image data and storing the light and shadow effect data as original light and shadow effect data, detecting each recorded frame of light and shadow effect picture, judging whether a frame loss condition exists or not, when detecting that certain frame of image data is lost, performing data processing through a channel two, sequentially filling the next frame of image data to the position of the lost frame of image data, and storing the next frame of image data as the original light and shadow effect data, thereby ensuring the continuity of the recorded image data of 60 frames per second, and when detecting that no image data is lost, performing data processing through the channel one, and directly storing the data as the original light and shadow effect data.
Compared with the first embodiment, the processes of the other steps are the same except that the processes of the above steps are different, and are not described herein again.
As shown in fig. 3, in the process of restoring the light and shadow effect of the scene image by using the light and shadow effect restoration method according to the second embodiment, firstly, a mobile phone camera is used to record the light and shadow effect of the scene image, in the recording process, the programmed App detects the recorded image data of each frame (for example, recording at a frame rate of 60 frames per second), when detecting that a certain frame of image data is lost, for example, 30 th frame of data is lost, the 29 th frame of data is automatically copied and filled up to the position of the lost 30 th frame of data, and then when detecting that the frame is lost, the frame of data is correspondingly supplemented according to the method (when the recording rate of 60 frames per second is used, 16.67 milliseconds obtains a frame of image data, correspondingly stores the light and shadow effect data in a frame of image data, when the light and shadow effect data of a certain frame of image data has a situation that cannot be obtained, substituting the previous frame of image data into the previous frame of image data), then storing the extracted light and shadow effect data of the light and shadow effect picture as a Binary light and shadow effect file, and if no frame data is detected to be lost, directly extracting the light and shadow effect data of the light and shadow effect picture and storing the light and shadow effect data as the Binary light and shadow effect file. And recording can be stopped at any time, and when the recording is stopped, the shadow effect file is saved to one frame of image data saved before the recording is stopped. And when the scene shadow effect needs to be restored, transmitting the stored shadow effect file to the LED lighting equipment, starting the LED lighting equipment, restoring and playing the scene shadow effect recorded in the shadow effect file according to the PMW, and ending the restoration of the scene shadow effect until the scene shadow effect is completely played.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A shadow effect reduction method is characterized by comprising the following steps:
recording the shadow effect: recording an environment light and shadow effect by adopting camera equipment, acquiring image data in the process of recording the light and shadow effect, extracting the light and shadow effect data in the image data and storing the light and shadow effect data as original light and shadow effect data;
acquiring a shadow effect file: converting the original light and shadow effect data into a light and shadow effect file recording the light and shadow effect data to be restored according to the original light and shadow effect data, and storing the light and shadow effect file;
reducing the shadow effect: and transmitting the shadow effect file to LED lighting equipment, and restoring and playing the shadow effect by the LED lighting equipment according to the shadow effect data to be restored recorded in the shadow effect file to illuminate.
2. The shadow effect reduction method according to claim 1,
in the process of recording the shadow effect, the shadow effect is recorded based on a mobile phone, the camera equipment is a mobile phone camera, and the frame rate of the mobile phone camera recording the environment shadow effect is less than or equal to 960 frames/second.
3. The shadow effect reduction method according to claim 2,
and in the process of recording the environment light and shadow effect, the mobile phone camera records the environment light and shadow effect at the rate of 60 frames per second.
4. The shadow effect reduction method according to claim 3,
in the step of recording the shadow effect, the method further comprises the following steps:
frame loss processing: in the process of recording the environmental light and shadow effect, before the light and shadow effect data in the extracted image data is stored as original light and shadow effect data, real-time detection is carried out on each frame of recorded image data, when the loss of a certain frame of image data is detected, the previous frame of image data is filled to the position of the lost frame of image data and is stored as the original light and shadow effect data, and when no image data is detected to be lost, the previous frame of image data is directly stored as the original light and shadow effect data.
5. The shadow effect reduction method according to claim 2,
in the step of recording the shadow effect, when the environment shadow effect is recorded based on a mobile phone camera, a flash lamp of the mobile phone is turned off so as to truly record the obtained environment shadow effect.
6. The shadow effect reduction method according to claim 1,
in the process of extracting and storing the light and shadow effect data in the image data as original light and shadow effect data, the light and shadow effect data comprise ambient light intensity data, ambient light color data and ambient light color temperature data, and the ambient light intensity data, the ambient light color data and the ambient light color temperature data are coupled with each other to present the light and shadow effect of a scene picture corresponding to the ambient light and shadow effect.
7. The shadow effect reduction method according to claim 6,
in the process of extracting and storing the shadow effect data in the image data as original shadow effect data, the ambient light color data in the shadow effect data takes the average hue displayed in the image data and converts the average hue into the color data of the shadow effect data to be restored recorded in the shadow effect file, and the color data of the shadow effect data to be restored meets the following requirements:
converting the image data into a shadow effect picture, and acquiring primary color values of all pixel points in the shadow effect picture: rm、Gm、BmThen, the corresponding light and shadow effect picture is converted to obtain the record in the light and shadow effect fileThe color data of the shadow effect data to be restored is,
Rflat plate＝(R1+R2+R3+···+Rm-1+Rm)/m，
GFlat plate＝(G1+G2+G3+···+Gm-1+Gm)/m，
BFlat plate＝(B1+B2+B3+···+Bm-1+Bm)/m，
And m is the number of pixel points in each light and shadow effect picture.
8. The shadow effect reduction method according to claim 6,
in the process of extracting light and shadow effect data in image data and storing the light and shadow effect data as original light and shadow effect data, converting the image data into light and shadow effect pictures, and in the process of extracting the light and shadow effect data in the light and shadow effect pictures, each piece of ambient light intensity data of the light and shadow effect pictures meets the following requirements:
K＝bmax 2/1000，L＝bn 2/K，
where K is the conversion ratio, bmaxFor the maximum light intensity value in all the image data, bnAnd the value range of the final light intensity value L is that L is not less than 0cd and not more than 1000 cd.
9. The shadow effect reduction method according to claim 2,
in the process of transmitting the shadow effect file to the LED lighting equipment, the mobile phone transmits the file data of the shadow effect file to the LED lighting equipment based on a Bluetooth transmission mode of a Bluetooth transmission protocol linked between the mobile phone and the LED lighting equipment.
10. The shadow effect reduction method according to claim 1,
the light and shadow effect file is a Binary file for recording light and shadow effect data to be restored, and the Binary file is generated based on a CCT mode or an HSI mode.
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| WO2021196557A1 (en) | 2021-10-07 |
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