Method for enhancing contrast ratio of camera
A camera and contrast technology, which is applied in the field of camera contrast adjustment, can solve problems such as narrow range, inability to sneak into high-definition cameras, and difficult implementation, and achieve a wide range of applications
Active Publication Date: 2014-12-03
BEIJING ITARGE TECH CO LTD
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Problems solved by technology
[0002] At present, there are many image enhancement algorithms that have been researched, but few of them can actually be applied to high-definition camera hardware. Many algorithms are complex and difficult to implement in the hardware implementation process, and cannot sneak into high-definition cameras.
There are also many algorithms that are only suitable for processing one image or multiple discontinuous images, so the application range of these algorithms is relatively narrow
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[0031] The present invention will be further described below in conjunction with the accompanying drawings.
[0032] combine figure 1 , an embodiment of the present invention. figure 1 The process consists of the following steps:
[0033] (1) A frame of image RAW data is collected by the CCD or CMOS image sensor of the camera;
[0034] (2) analyze the image RAW data collected in step (1) in conjunction with the ratio switch parameter K set in advance by the camera, and analyze the data distribution law coefficient C of the two-dimensional RAW data histogram of the image;
[0035] (3) The coefficient C obtained in step (2) is used as the enhancement coefficient, and the image contrast is enhanced by means of image histogram equalization.
[0036] refer to figure 2 , figure 1 The calculation process of the coefficient C in the embodiment.
[0037] ① Find the maximum value L and the median value M in the RAW two-dimensional array, half of the maximum value is the median va...
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The invention provides a method for enhancing contrast ratio of a camera, which includes the following steps of (1) collecting RAW data of a frame of an image through a charge-coupled device (CCD) or complementary metal-oxide-semiconductor transistor (CMOS) image sensor; (2) analyzing the image RAW data collected in the step (1) according to a preset ratio switch parameter K of the camera, and analyzing a data distribution rule factor C of a histogram of the image two-dimensional RAW data; and (3) using the factor C obtained in the step (2) as an enhancement factor, and enhancing the image contrast ratio by using an image histogram equalization mode. The method can not only achieve software operation, but also can well submerge in the camera through a register of hardware configured in the camera, and is wide in application scope.
Description
technical field [0001] The invention belongs to the technical field of camera contrast adjustment, in particular to a camera contrast enhancement method. Background technique [0002] At present, there are many image enhancement algorithms that have been researched, but few of them can actually be applied to high-definition camera hardware. Many algorithms are complex and difficult to implement in the hardware implementation process, and cannot be sneaked into high-definition cameras. There are also many algorithms that are only suitable for processing one image or multiple discontinuous images, so the application range of these algorithms is relatively narrow. Contents of the invention [0003] In order to solve the defects of the above-mentioned image enhancement algorithm, the present invention proposes a new camera contrast enhancement method, which is not only suitable for the processing of a single image, but also suitable for the processing of high-definition camera...
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IPC IPC(8): H04N5/232H04N9/04G06T5/40
Inventor 杨云飞
Owner BEIJING ITARGE TECH CO LTD