CN103327221B - Camera device and its image preview system and image preview method - Google Patents

Abstract

The invention discloses a camera device, an image preview system and an image preview method thereof. The camera device comprises a camera module, an image processing module and a display module. The camera module captures a plurality of images. The image processing module reduces the pixels of each image to generate a plurality of adjusted images, and then synthesizes the plurality of adjusted images to generate a preview image. The display module displays the preview image. When the image processing module finishes the synthesis of the plurality of adjusted images, the image processing module synthesizes the plurality of images to generate a high dynamic range image.

Description

Camera device and its image preview system and image preview method

technical field

The present invention relates to a camera device and its image preview system and image preview method, in particular to a camera device capable of quickly previewing high dynamic range images and its image preview system and image preview method.

Background technique

At present, most people are equipped with camera devices such as digital cameras and smart camera phones, which are used to shoot images to leave wonderful memories for their lives. Due to the development of life science and technology, the current camera devices not only have general imaging technology, but some camera devices have high dynamic range imaging (High Dynamic Range Imaging, HDRI) technology, so that the camera device can capture more rich and real images. video screen.

Still images captured by general camera devices often cannot reproduce the real scene seen by human eyes at that time. This is because the dynamic range (Dynamic Range) that can be expressed by an image limited to a single exposure value is much lower than that of a real scene. In order to solve this problem, an algorithm using multiple images with different exposure values came into being. This type of algorithm is to combine multiple images with different exposure values to generate a high dynamic range image (High Dynamic Range Image, HDRI), to solve the problem that the color gradation caused by a single exposure value image with too small dynamic range is much lower than that of the human eye. see the problem.

However, after the user shoots an image using a known camera device with high dynamic range photography technology, the camera device performs image processing on the full original size of the image, waits until the image is synthesized into a high dynamic range image and then zooms out to generate a preview image, and then display the preview image on the display screen for the user to watch. Such a process will make the user have to wait for a long time before viewing the captured image, which will greatly reduce the convenience of use.

Contents of the invention

In view of the above-mentioned problems in the prior art, one of the objects of the present invention is to provide a camera device and its image preview system and image preview method to solve the waiting time required for the conventional camera device to generate a high dynamic range preview image. longer question.

According to the object of the present invention, a camera device is proposed, which includes a camera module, an image processing module and a display module. The camera module captures a plurality of images. The image processing module shrinks the pixels of each image to generate a plurality of adjustment images, and then synthesizes the plurality of adjustment images to generate a preview image. The display module displays a preview image. Wherein, when the image processing module finishes synthesizing the plurality of adjusted images, the image processing module synthesizes the plurality of images to generate a high dynamic range image.

Preferably, the exposure of each image is different.

Preferably, after the image processing module synthesizes the preview image and the high dynamic range image, it further performs a tone adjustment operation on the preview image and the high dynamic range image respectively.

Preferably, after the image processing module synthesizes the preview image and the high dynamic range image, an image rendering operation is performed on the preview image and the high dynamic range image respectively.

Preferably, the camera device of the present invention further includes a memory module for selectively storing high dynamic range images.

According to the purpose of the present invention, an image preview system is proposed, which is suitable for a camera device. The image preview system includes an image adjustment module and an image synthesis module. After a camera module of the camera device captures a plurality of images, the image adjustment module performs a pixel reduction operation on each image to generate a plurality of adjusted images. After the image synthesizing module combines a plurality of adjusted images to generate a preview image, the preview image is displayed through a display module of the camera device. Wherein, when the image synthesis module finishes synthesizing the plurality of adjusted images, the image synthesis module synthesizes the plurality of images to generate a high dynamic range image.

Preferably, the image preview system described in the present invention further includes an image tone adjustment module. After the image synthesis module synthesizes the preview image and the high dynamic range image, the image tone adjustment module separately adjusts the preview image and the high dynamic range image. A one-tone alignment operation is performed on the range image.

Preferably, the image preview system described in the present invention further includes an image rendering module. After the preview image and the high dynamic range image complete the tone adjustment action, the image rendering module respectively performs an image rendering on the preview image and the high dynamic range image. Render action.

According to the purpose of the present invention, an image preview method is proposed, which includes the following steps: capturing a plurality of images through a camera module; using an image processing module to reduce the pixels of each image to generate a plurality of adjusted images; using the image The processing module synthesizes a plurality of adjustment images to generate a preview image; and displays the preview image in a display area through a display module. Wherein, when the image processing module is used to synthesize the plurality of adjusted images, the image processing module synthesizes the plurality of images to generate a high dynamic range image.

Based on the above, the imaging device and its image preview system and image preview method of the present invention, after the user finishes shooting the image, when performing image processing, the image data captured by the user will be reduced first and then the image will be synthesized. Production industry, to quickly generate a high dynamic range preview image for users to watch. While the user watches the high dynamic range preview image, the camera device synthesizes the original size image data to generate the original high dynamic range image and store it. Time to watch high dynamic range preview images to improve the convenience of use.

Description of drawings

Fig. 1 is the block diagram of camera device of the present invention;

Fig. 2 is the block diagram of camera device and image preview system thereof of the present invention;

FIG. 3 is a flow chart of the image preview method of the present invention;

FIG. 4 is a schematic flowchart of an embodiment of the camera device, its image preview system and image preview method of the present invention.

In the figure: 1, 4: camera device 11, 41: camera module 12: image processing module 121, 311: multiple adjustment images 122, 321: preview image 123, 322: high dynamic range image 13, 42: display module Groups 14, 43: memory modules 2, 5: multiple images 3: image preview system 31: image adjustment module 32: image synthesis module 33: image tone adjustment module 34: image rendering modules S31-S34, S41-S45, S51-S54: steps.

detailed description

In order for the examiner to understand the technical features, content and advantages of the present invention and the effects it can achieve, the present invention is hereby combined with the accompanying drawings and described in detail in the form of embodiments as follows, and the drawings used therein are, Its purpose is only for illustration and auxiliary instructions, not necessarily the true proportion and precise configuration of the present invention after implementation, so it should not be interpreted based on the proportion and configuration relationship of the attached drawings, and limit the scope of rights of the present invention in actual implementation , together first describe.

Please refer to FIG. 1 , which is a block diagram of the imaging device of the present invention. In the figure, the camera device 1 includes a camera module 11, an image processing module 12, a display module 13 and a memory module 14, the image processing module 12 and the camera module 11, the display module 13 and the memory The module 14 is electrically connected. The camera device 1 can be a digital camera, a smart camera phone or other devices with image capture function. The camera module 11 includes a lens, an image sensing element, and the like. The image processing module 12 can be a processor, image processing software or an algorithm, and the like. The display module 13 can be an LCD or LED liquid crystal screen or the like. The memory module 14 can be a built-in memory or an external memory card. The above mentioned are all examples of implementation and should not be limited thereto.

Among the above, the camera device 1 has high dynamic range imaging technology. When a user takes a picture with the camera device 1 , a plurality of images 2 can be captured through the camera module 11 first. Then the pixels of each image 2 are reduced by the image processing module 12 to generate a plurality of adjusted images 121 , and then the plurality of adjusted images 121 are synthesized to generate a preview image 122 . Then the display module 13 displays the preview image 122 . After the image processing module 12 synthesizes the plurality of adjusted images 121, it synthesizes the plurality of images 2 of the original data to generate a high dynamic range image 123, and provides the user with the option to store it in the memory module 14 . In this way, the pixels of each image 2 are first compressed and then synthesized, so that the user can quickly view the captured results and reduce the waiting time. Wherein, the exposure of each image 2 is different.

In the above, after the image processing module 12 synthesizes the preview image 122 or the high dynamic range image 123 , it will perform a tone adjustment operation on the preview image 122 and the high dynamic range image 123 respectively. Furthermore, after the image processing module 12 synthesizes the preview image 122 or the high dynamic range image 123, or after the preview image 122 or the high dynamic range image 123 is tone-adjusted, the image processing module 12 further performs the preview image 122 respectively. and the high dynamic range image 123 to perform an image rendering operation. Among them, the technology that the imaging device 1 of the present invention can achieve rapid image preview is not only applicable to high dynamic range imaging technology, but also can be implemented in general photography, and this is only a preferred application range, which is not intended to be used here. Limiter. In addition, the image processing program performed by the image processing module 12 of the present invention is not only applicable after the camera module 11 captures the image 2 . The image data can also be taken out from the memory module 14 to perform image processing.

Please refer to FIG. 2 , which is a block diagram of the camera device and its image preview system of the present invention. In the figure, the image preview system 3 of the present invention can be applied in a camera device 4 . This image preview system 3 can be a processing chip or an image processing software, which can include an image adjustment module 31, an image synthesis module 32, an image tone adjustment module 33 and an image rendering module 34, the image The synthesis module 32 is connected to the image adjustment module 31 and the image tone adjustment module 33 , and the image tone adjustment module 33 is further connected to the image rendering module 34 . The camera device 4 includes a camera module 41 , a display module 42 and a memory module 43 . The camera module 41 may include a lens, an image sensor, and the like. The display module 42 can be an LED or an LCD liquid crystal screen or the like. The memory module 43 can be a built-in memory or an external memory card.

In the above, when the camera device 4 is activated and a plurality of images 5 are captured by the camera module 41 , the image adjustment module 31 will receive each image 5 and reduce the pixels of each image 5 to generate a plurality of adjusted images 311 . Then the image synthesis module 32 receives a plurality of adjustment images 311 and synthesizes each adjustment image 311 into a preview image 321 . Then the preview image 321 is received by the image tone alignment module 33 and a tone alignment operation is performed. At the same time, the image combination module 32 will start to combine the images 5 to generate a high dynamic range image 322 . Then, when the image rendering module 34 receives the tone-adjusted preview image 321 and performs an image rendering operation, the image tone adjustment module 33 receives the high dynamic range image 322 and performs tone adjustment. Finally, when the preview image 321 is rendered and displayed on the display module 42, the image rendering module 34 receives the high dynamic range image 322 and performs image rendering, and then the memory module 43 selectively renders the high dynamic range image 322 stored. Compared with the conventional method of synthesizing image data with the original file size and then shrinking and displaying them, the present invention enables users to watch the synthesized high dynamic range preview images faster, thereby reducing waiting time.

In the above, when the image synthesis module 32, the image tone adjustment module 33, and the image rendering module 34 of the image preview system 3 generate the preview image 321 or perform color adjustment or rendering operations on the preview image 321, the image synthesis module The group 32 , the image tone adjustment module 33 and the image rendering module 34 start to synthesize the images 5 with the original file size or perform color adjustment or rendering operations on the high dynamic range image 322 . That is, when one of the modules executes the program, it continues with the next processing program to speed up the image processing speed in a parallel manner. However, this image processing method is only an example of implementation. The image preview system 3 can also start to process each image of the original file size when each module has processed the preview image 321 and displayed it on the display module 42 for the user to watch. 5 Compositing and performing various image processing actions.

Please refer to FIG. 3 , which is a flow chart of the image preview method of the present invention, and its step flow is: S31: capture a plurality of images through a camera module; S32: use an image processing module to reduce the pixels of each image to generate A plurality of adjustment images; S33: use the image processing module to synthesize the plurality of adjustment images to generate a preview image; S34: display the preview image through a display module. Wherein, when the image processing module combines the adjusted images into a preview image, it will immediately perform a synthesis action on each image with the original file size to form a high dynamic range image. Alternatively, when the display module displays the preview image, the image processing module starts to synthesize and store the images of each original file size. The above-mentioned image processing methods all allow users to view the photos they have taken relatively quickly after taking images.

Please refer to FIG. 4 , which is a schematic flowchart of an embodiment of the camera device, its image preview system and image preview method of the present invention. In this embodiment, there is an image A and an image B, and the image A and image B are captured by the camera device or stored in the memory or buffer memory of the camera device. Wherein, the exposure values of the image A and the image B are different. After acquiring the image A and the image B, the image preview system in the camera device will execute the first image processing step S41: reducing the image A and the image B. For example, the pixels of image A and image B in the original file are 4000*3000, and the pixels of image A and image B are reduced to 400*300 after step S41. After the image A and the image B are shrunk, a second image processing step S42 is performed: image synthesis of the image A and the image B is performed. Afterwards, the third image processing step S43 is executed: the image A and the image B are synthesized and then a tone reproduction (Tone Reproduction) operation is performed. Next, a fourth image processing step S44 is executed: performing an image rendering (Image Rendering) operation on the synthesized image A and image B. The last step S45: combining the image A and the image B and performing some image processing to quickly generate a high dynamic range preview image on the display screen of the camera device.

In the above, when the image processing procedure in step S42 ends, the image synthesis function of the image preview system will free up working time, and then step S51 can be executed: image synthesis of image A and image B with the original file size. When the image processing procedure in step S43 ends, step S52 is executed: image A and image B of the original file size are synthesized and tone adjustment is performed. When the image processing procedure in step S44 ends, step S53 is executed: performing image rendering on the synthesized original image A and image B. Finally, step S54 is executed: generating and storing the original high dynamic range image. It can be seen from this that the present invention reduces the size of the original image first and then synthesizes it to quickly generate a high dynamic range preview image for the user to watch, and synthesizes the original image to obtain the original high-resolution image while the user is watching. The dynamic range image, in this way, can reduce the time for users to wait for viewing photos, and is more convenient to use.

To sum up the above, the imaging device and its image preview system and image preview method of the present invention have changed the conventional image processing method, but first shrink and synthesize the obtained multiple images, so as to quickly generate a high dynamic A range preview image is shown to the user. When the user watches, the original images are synthesized to generate the original high dynamic range image, thereby effectively reducing the user's waiting time for viewing photos.

The above descriptions are illustrative only, not restrictive. Any equivalent modification or change made without departing from the spirit and scope of the present invention shall be included in the patent scope of the present invention.

Claims (12)

1. a camera head, it is characterised in that comprise:

One camera module, captures a plurality of image；

One image processing module, reduces the pixel of respectively this image to produce a plurality of adjustment images, then by these a plurality of adjustment shadows As carrying out synthesizing to produce a preview image；And

One display module, shows this preview image；

Wherein, the exposure of a plurality of images is different, and this image processing module performs synthesis knot to these a plurality of adjustment images Shu Shi, these a plurality of images are synthesized to produce a high dynamic-range image by this image processing module.

2. camera head as claimed in claim 1, it is characterised in that: wherein this image processing module synthesizes this preview image And after this high dynamic-range image, more respectively this preview image and this high dynamic-range image are carried out the quasi-action of key of the same colour.

3. camera head as claimed in claim 1, it is characterised in that: wherein this image processing module synthesizes this preview image And after this high dynamic-range image, more respectively this preview image and this high dynamic-range image are carried out an image and render action.

4. camera head as claimed in claim 1, it is characterised in that: it further includes a memory module, optionally to store This high dynamic-range image.

5. an image prebrowsing system a, it is adaptable to camera head, it is characterised in that comprise:

One image adjusts module, and after a camera module of this camera head captures a plurality of images, this image adjusts module to respectively The pixel that carries out this image reduces action to produce a plurality of adjustment images；And

One Image compounding module, synthesize these a plurality of adjustment images to produce a preview image after, via the one of this camera head Display this preview image of module displays；

Wherein, the exposure of a plurality of images is different, when this Image compounding module performs synthesis to these a plurality of adjustment images At the end of, these a plurality of images are synthesized to produce a high dynamic-range image by this Image compounding module.

6. image prebrowsing system as claimed in claim 5, it is characterised in that: it further includes an image tone adjustment module, should After Image compounding module synthesizes this preview image and this high dynamic-range image, this image tone adjustment module is pre-to this respectively Look at image and this high dynamic-range image carries out the quasi-action of key of the same colour.

7. image prebrowsing system as claimed in claim 6, it is characterised in that: it further includes an image and renders module, this preview After image and this high dynamic-range image complete this tone adjustment action, this image render module respectively to this preview image and should High dynamic-range image carries out an image and renders action.

8. image prebrowsing system as claimed in claim 5, it is characterised in that: wherein this high dynamic-range image will optionally It is stored in a memory module of this camera head.

9. an image method for previewing, it is characterised in that comprise the steps of

A plurality of images are captured via a camera module；

Utilize the pixel of image processing module narrows respectively this image to produce a plurality of adjustment images；

This image processing module is utilized to carry out synthesizing to produce a preview image by these a plurality of adjustment images；And

Via display this preview image of module displays；

Wherein, the exposure of a plurality of images is different, utilizes this image processing module that these a plurality of adjustment images are performed conjunction At the end of one-tenth, these a plurality of images are synthesized to produce a high dynamic-range image by this image processing module.

10. image method for previewing as claimed in claim 9, it is characterised in that further include the following step:

After synthesizing this preview image and this high dynamic-range image, more utilize this image processing module respectively to this preview shadow Picture and this high dynamic-range image carry out the quasi-action of key of the same colour.

11. image method for previewing as claimed in claim 9, it is characterised in that further include the following step:

After synthesizing this preview image and this high dynamic-range image, more utilize this image processing module respectively to this preview shadow Picture and this high dynamic-range image carry out an image and render action.

12. image method for previewing as claimed in claim 9, it is characterised in that further include the following step:

This high dynamic-range image is optionally stored by a memory module.