CN103516984A - Method and device for intelligently switching to HDR mode of camera - Google Patents
Method and device for intelligently switching to HDR mode of camera Download PDFInfo
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- CN103516984A CN103516984A CN201310417344.8A CN201310417344A CN103516984A CN 103516984 A CN103516984 A CN 103516984A CN 201310417344 A CN201310417344 A CN 201310417344A CN 103516984 A CN103516984 A CN 103516984A
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Abstract
The invention relates to a method and device for intelligently switching to an HDR mode of a camera. Computer program instructions are used for controlling a computer to complete the camera method for intelligently switching the HDR mode through establishing of a functional module framework, and the computer program instructions are stored in computer readable storage media. The method includes the steps that the duty ratio of pixels of which the brightness value is smaller than a preset low brightness value and the duty ratio of pixels of which the brightness value is larger than a preset high brightness value in an image of a current scene of a camera are estimated, and switching to the HDR mode can be achieved only when the duty ratio of the pixels of which the brightness value is smaller than the preset low brightness value is larger than a preset low brightness ratio threshold value and the duty ratio of the pixels of which the brightness value is larger than the preset high brightness value is larger than a preset high brightness ratio threshold value. In combination with the characteristics of the HDR mode, the estimation of the duty ratio of the pixels of which the brightness value is smaller than the preset low brightness value and the duty ratio of the pixels of which the brightness value is larger than the preset high brightness value in the image of the current scene can really reflect brightness distribution conditions of the actual scene, and accurately judge whether or not switching to the HDR mode needs to be performed to take photos.
Description
Technical field
The present invention relates to a kind of camera intelligence and switch the method for HDR pattern, the method, by setting up functional module construction, is controlled computer system by computer program instructions and is completed, and these computer program instructions are stored in computer-readable recording medium.
Background technology
When the general mode of use camera is taken pictures, if it is too large that the picture brightness of current scene differs, the photo of taking the just bright place of easy appearance is crossed situation bright or that dark place is excessively dark, thereby lose the details of Liang Chuhuo dark place, affected the quality of photo, if now want, in photo, retain details as much as possible, need to adopt HDR(High-Dynamic Range, high dynamic range) pattern is taken pictures, because the photo that HDR pattern is taken pictures and obtained, compare the photo that general mode is taken pictures and obtained, more dynamic range and image detail can be provided.The principle of HDR is, according to LDR image (the Low-Dynamic Range of different time for exposure, be called for short LDR, low dynamic range echograms), utilize the LDR image of each corresponding best details of time for exposure to synthesize final HDR image, the HDR image obtaining like this can the better visual effect that must reflect in true environment.
Camera of today comprises multiple exposal model, wherein just there is HDR pattern, but when taking pictures, need user's manual switchover exposal model, most domestic consumer does not have professional photographic knowledge and technical ability, these domestic consumers also do not know the photo which scene should just can be taken by HDR pattern, therefore manual switchover HDR pattern is intelligent not, and inconvenient domestic consumer is used.
Summary of the invention
The object of this invention is to provide a kind of method that can facilitate the camera intelligence switching HDR of the domestic consumer's use that does not possess professional photographic knowledge and technical ability.
For achieving the above object, the invention provides following technical scheme.
Camera intelligence is switched the method for HDR pattern, add up brightness value in the image of described camera current scene and be less than the accounting of pixel of default low bright value and the accounting that brightness value is greater than the pixel of default highlighted value, when the accounting that is less than the pixel of default low bright value at brightness value is greater than accounting that default low bright proportion threshold value and brightness value be greater than the pixel of default highlighted value and is greater than default highlighted proportion threshold value, be switched to HDR pattern.
Wherein, by the data in brightness histogram, add up brightness value in the image of described camera current scene and be less than the accounting of pixel of default low bright value and the accounting that brightness value is greater than the pixel of default highlighted value.
Wherein, default low bright proportion threshold value equates with default highlighted proportion threshold value.
Wherein, described brightness value is the Y value of YUV color space.
Wherein, described current scene be the scene of preview before described camera is taken pictures or take pictures after the scene of the photo that obtains.
The invention has the beneficial effects as follows: the feature that is applicable to the scene that light and shade difference is large in conjunction with HDR pattern, in the image of statistics current scene, brightness value is less than the accounting of the pixel of presetting low bright value and the accounting that brightness value is greater than the pixel of default highlighted value, the Luminance Distribution situation that can reflect truly actual scene, determine whether that exactly need to be switched to HDR pattern takes pictures, without artificial judgment and switching; In addition, the brightness histogram automatically generating by camera is added up, and without carrying out, loaded down with trivial details computing and statistics are accurate, saving resource and photo opporunity.
Embodiment
Below in conjunction with embodiment, the present invention is elaborated.
It is example that the present embodiment be take the camera of mobile phone.The HDR pattern of camera is applicable to take the scene that light and shade difference is large, therefore whether current scene needs to switch to HDR pattern and takes, whether light and shade difference is large need to first to judge current scene, camera of the present invention intelligence switch HDR pattern method most critical be judge current scene light and shade difference whether enough greatly.For this reason, camera intelligence of the present invention is switched the method for HDR pattern, first be exactly the ratio that the pixel of adding up low bright area in the image of current scene of camera accounts for the pixel of whole image, the i.e. accounting of the pixel of low bright area, also to add up the accounting of the pixel of highlight regions simultaneously, the low bright area here refers to that the brightness value of pixel is less than default Di Liangzhi region, in like manner, highlight regions refers to that the brightness value of pixel is greater than default highlighted Zhi region, default low bright value and default highlighted value are the brightness values of default settings, default low bright value and default highlighted value can draw according to historical statistical data, also can debug and draw voluntarily, can be as required in practical application or actual effect select.Particularly, more employing YUV color space in mobile phone, so the brightness value in the present embodiment specifically refers to the Y value in YUV color space.Count the accounting of pixel of low bright area and the accounting of the pixel of highlight regions, just easily found out the situation of the light and shade difference in the image of current scene, now again the accounting of the pixel of low bright area and default low bright proportion threshold value are compared, the accounting of the pixel of highlight regions and default highlighted proportion threshold value are compared simultaneously, default low bright proportion threshold value and default highlighted proportion threshold value all in advance rule of thumb or debug results set, default low bright proportion threshold value and default highlighted proportion threshold value can equate, also can be unequal, specifically according to actual conditions, set.When the accounting that is greater than the pixel of default low bright proportion threshold value and highlight regions when the accounting of the pixel of low bright area is greater than default highlighted proportion threshold value, show that current scene light and shade difference is large, camera is just switched to HDR pattern and takes pictures.It should be noted that, the accounting that is greater than the pixel of default low bright proportion threshold value and highlight regions in the accounting of the pixel of low bright area is just switched to HDR pattern while being greater than default highlighted proportion threshold value, this is because in other cases, the accounting that is less than the pixel of default low bright proportion threshold value and highlight regions such as the accounting of the pixel of low bright area is greater than default highlighted proportion threshold value, or the accounting that the accounting of the pixel of low bright area is greater than the pixel of default low bright proportion threshold value and highlight regions is less than default highlighted proportion threshold value, or the accounting that the accounting of the pixel of low bright area is less than the pixel of default low bright proportion threshold value and highlight regions is less than default highlighted proportion threshold value, can only show that current scene is partially bright or partially dark or do not work also not dark, can not show that current scene light and shade difference is very large, therefore add up the accounting of pixel of low bright area and the accounting of the pixel of highlight regions in the image of current scene, the Luminance Distribution situation that can reflect truly actual scene, meet the feature that HDR pattern is taken pictures, thereby determine whether that exactly need to be switched to HDR pattern takes pictures, without artificial judgment and switching.
Wherein, described current scene be the scene of preview before camera is taken pictures or take pictures after the scene of the photo that obtains, the accounting of pixel of low bright area and the accounting of the pixel of highlight regions in the image of statistics current scene, need to first obtain the Luminance Distribution situation of pixel in the image of current scene, camera intelligence of the present invention is switched the method for HDR pattern, to add up by the data in the automatic brightness histogram generating of camera, according to default low bright value and default highlighted value, only need to be less than in cumulative brightness histogram the pixel quantity and the pixel quantity that is greater than each brightness value of default highlighted value of each brightness value of presetting low bright value, and then calculate respectively the pixel accounting of low bright area and the pixel accounting of highlight regions.Because camera is when the preview or take pictures and obtain photo, conventionally all can automatically generate brightness histogram, therefore without again going the brightness value that obtains each pixel to add up, greatly reduce operand, not only save resource, also reduced the photo opporunity of camera.
The method providing herein, all or part of step wherein can, by setting up functional module construction, be controlled computer system by computer program instructions and complete.These computer program instructions are stored in computer-readable recording medium.
Finally should be noted that; above embodiment is only in order to illustrate technical scheme of the present invention; but not limiting the scope of the invention; although the present invention has been done to explain with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify or be equal to replacement technical scheme of the present invention, and not depart from essence and the scope of technical solution of the present invention.
Claims (10)
1. camera intelligence is switched the method for HDR pattern, it is characterized in that, add up brightness value in the image of described camera current scene and be less than the accounting of pixel of default low bright value and the accounting that brightness value is greater than the pixel of default highlighted value, when the accounting that is less than the pixel of default low bright value at brightness value is greater than accounting that default low bright proportion threshold value and brightness value be greater than the pixel of default highlighted value and is greater than default highlighted proportion threshold value, be switched to HDR pattern.
2. camera intelligence according to claim 1 is switched the method for HDR pattern, it is characterized in that, by the data in brightness histogram, add up brightness value in the image of described camera current scene and be less than the accounting of pixel of default low bright value and the accounting that brightness value is greater than the pixel of default highlighted value.
3. camera intelligence according to claim 1 is switched the method for HDR pattern, it is characterized in that, default low bright proportion threshold value equates with default highlighted proportion threshold value.
4. camera intelligence according to claim 1 is switched the method for HDR pattern, it is characterized in that, described brightness value is the Y value of YUV color space.
5. camera according to claim 1 intelligence is switched the method for HDR pattern, it is characterized in that, described current scene be the scene of preview before described camera is taken pictures or take pictures after the scene of the photo that obtains.
6. camera intelligence is switched the device of HDR pattern, it is characterized in that, comprises with lower device:
It adds up device A. brightness value in the image of described camera current scene and is less than the accounting of pixel of default low bright value and the accounting that brightness value is greater than the pixel of default highlighted value;
When its accounting that is less than the pixel of default low bright value at brightness value of device B is greater than accounting that default low bright proportion threshold value and brightness value be greater than the pixel of default highlighted value and is greater than default highlighted proportion threshold value, be switched to HDR pattern.
7. camera intelligence according to claim 6 is switched the device of HDR pattern, it is characterized in that, device A particularly, adds up brightness value in the image of described camera current scene and is less than the accounting of pixel of default low bright value and the accounting that brightness value is greater than the pixel of default highlighted value by the data in brightness histogram.
8. camera intelligence according to claim 6 is switched the device of HDR pattern, it is characterized in that, default low bright proportion threshold value equates with default highlighted proportion threshold value.
9. camera intelligence according to claim 6 is switched the device of HDR pattern, it is characterized in that, described brightness value is the Y value of YUV color space.
10. camera according to claim 6 intelligence is switched the device of HDR pattern, it is characterized in that, described current scene be the scene of preview before described camera is taken pictures or take pictures after the scene of the photo that obtains.
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| CN104883504A (en) * | 2015-06-05 | 2015-09-02 | 广东欧珀移动通信有限公司 | Method and device for opening HDR (high-dynamic range) function on intelligent terminal |
| CN105376490A (en) * | 2015-11-19 | 2016-03-02 | 浙江宇视科技有限公司 | Mode switching method, mode switching apparatus and terminal device using mode switching method |
| CN105915791A (en) * | 2016-05-03 | 2016-08-31 | 广东欧珀移动通信有限公司 | Electronic device control method and device, and electronic device |
| CN106067177A (en) * | 2016-06-15 | 2016-11-02 | 深圳市万普拉斯科技有限公司 | HDR scene method for detecting and device |
| CN106572311A (en) * | 2016-11-11 | 2017-04-19 | 努比亚技术有限公司 | Shooting apparatus and method thereof |
| CN106961550A (en) * | 2017-03-07 | 2017-07-18 | 浙江大华技术股份有限公司 | A kind of changing method and device of shooting state |
| US10616499B2 (en) | 2016-07-29 | 2020-04-07 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method and device for capturing high dynamic range image, and electronic device |
| CN111263079A (en) * | 2020-02-18 | 2020-06-09 | Oppo广东移动通信有限公司 | Image processing method, image processing device, storage medium and electronic equipment |
| US11399136B2 (en) * | 2018-09-19 | 2022-07-26 | Gopro, Inc. | Automated camera mode selection |
| CN115767262A (en) * | 2022-10-31 | 2023-03-07 | 华为技术有限公司 | Photographing method and electronic equipment |
| CN117651221A (en) * | 2022-08-09 | 2024-03-05 | 荣耀终端有限公司 | Video processing method and electronic equipment |
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| CN104883504A (en) * | 2015-06-05 | 2015-09-02 | 广东欧珀移动通信有限公司 | Method and device for opening HDR (high-dynamic range) function on intelligent terminal |
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| US10616499B2 (en) | 2016-07-29 | 2020-04-07 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method and device for capturing high dynamic range image, and electronic device |
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| CN106572311A (en) * | 2016-11-11 | 2017-04-19 | 努比亚技术有限公司 | Shooting apparatus and method thereof |
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| US20240015397A1 (en) * | 2018-09-19 | 2024-01-11 | Gopro, Inc. | Automated camera mode selection |
| CN111263079A (en) * | 2020-02-18 | 2020-06-09 | Oppo广东移动通信有限公司 | Image processing method, image processing device, storage medium and electronic equipment |
| CN111263079B (en) * | 2020-02-18 | 2021-06-15 | Oppo广东移动通信有限公司 | Image processing method, image processing device, storage medium and electronic equipment |
| CN117651221A (en) * | 2022-08-09 | 2024-03-05 | 荣耀终端有限公司 | Video processing method and electronic equipment |
| CN115767262A (en) * | 2022-10-31 | 2023-03-07 | 华为技术有限公司 | Photographing method and electronic equipment |
| CN115767262B (en) * | 2022-10-31 | 2024-01-16 | 华为技术有限公司 | Photographing method and electronic equipment |
| WO2024093545A1 (en) * | 2022-10-31 | 2024-05-10 | 华为技术有限公司 | Photographing method and electronic device |
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