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Method and device for enhancing night vision image in self-adaption mode
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An adaptive enhancement and self-adaptive technology, applied in the field of data processing, can solve problems such as enhancing night market images, and achieve the effect of improving brightness
Inactive Publication Date: 2015-04-29
NINGXIA UNIVERSITY
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[0004] The purpose of the embodiments of the present invention is to propose a method and device for adaptively enhancing night vision images, aiming at solving the problem of how to adaptively enhance night market images according to different occasions
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Embodiment 1
[0036] refer to figure 1 , figure 1 It is a schematicflowchart of an embodiment of a method for adaptively enhancing night vision images in the present invention.
[0037] In the first embodiment, the method for adaptively enhancing night vision images includes:
[0038] Step 101, obtaining the initial value of the luminance field of the low-illuminance image;
[0039] Specifically, the initial value L(x,y)=max of the brightness field of the low-illuminance image is acquired 3×3 (I r , I g , I b ), first obtain the maximum value of the RGB three channels of a single pixel in the entire image, and then obtain the maximum value within the 3X3 frame range of the pixel.
[0040] Step 102, obtaining a transmittance restoration function according to the initial value;
[0041] Specifically, the transmittance repair function is obtained according to the initial value Re ( x , y ) ...
Embodiment 2
[0060] refer to image 3 , image 3 It is a schematic diagram of functional modules of an embodiment of a device for adaptively enhancing night vision images in the present invention.
[0061] In the second embodiment, the device for adaptively enhancing night vision images includes:
[0062] The first acquiring unit 301 is configured to acquire an initial value of the brightness field of the low-illuminance image;
[0063] Specifically, the initial value L(x,y)=max of the brightness field of the low-illuminance image is acquired 3×3 (I r , Ig ,I b ), first obtain the maximum value of the RGB three channels of a single pixel in the entire image, and then obtain the maximum value within the 3X3 frame range of the pixel.
[0064] The second acquiring unit 302 is configured to acquire a transmittance restoration function according to the initial value;
[0065] Specifically, the transmittance repair function is obtained according to the initial value Re ...
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Abstract
The embodiment of the invention discloses a method and device for enhancing a night vision image in a self-adaption mode. The method comprises the steps that the initial value of a brightness field of a low-light image is obtained; a transmissivity repair function is obtained according to the initial value; enhancement processing is carried out on the low-light image according to the transmissivity repair function and an atmospheric light scatteringphysical model, the curve confirming to the visual characteristic of the human eyes is utilized, the pixels of RGB channels of a color image are all processed, a self-adaption increment coefficient is added, the brightness can be effectively improved, and therefore the method and device can adapt to various occasions and color images or grey level images or optical images or other images, and universality is achieved.
Description
technical field [0001] The invention relates to the technical field of data processing, in particular to a method and device for adaptively enhancing night vision images. Background technique [0002] The existing night visionimage enhancement technology generally adopts the algorithm of histogramequalization, the color of the processed color image is easily distorted, and it is easy to cause problems such as the details of the processed black and white image are not clear enough. [0003] If other combined algorithms are used, due to the high computational complexity, adaptive adjustment cannot be achieved, so the practical value is not great. Contents of the invention [0004] The purpose of the embodiments of the present invention is to provide a method and device for adaptively enhancing night vision images, aiming at solving the problem of how to adaptively enhance night market images according to different occasions. [0005] To achieve this purpose, the embodimen...
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