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Method, device and storage medium for enhancing image contrast

A technology for enhancing images and storage media, which is applied in the field of image processing, can solve the problems of unreal images, complex images, and low image quality, and achieve the effects of real image effects, high image quality, and high dynamic range

Inactive Publication Date: 2018-09-07
SZ DJI TECH CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

However, since the above algorithm is based on prior conditions to optimize the light intensity part, and real images are often more complex, the prior conditions are difficult to reflect the real world colors well, so that the contrast-enhanced image appears unrealistic effect , leading to poor image quality

Method used

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  • Method, device and storage medium for enhancing image contrast
  • Method, device and storage medium for enhancing image contrast
  • Method, device and storage medium for enhancing image contrast

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Embodiment Construction

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0025] When digital camera equipment is shooting, if the photosensitive range of its image sensor is lower than the dynamic range of the natural scene, it will lead to overexposure or underexposure of the captured image. At this time, it is necessary to enhance the contrast of the image. Improves the display of detailed information in images. In some typical application scenarios of computer vision recognition, such as face recognition, scene recognition, pedestrian detection, etc.,...

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Abstract

A method, device and storage medium for enhancing image contrast, the method comprising: invoking a neural network, the training set of the neural network being a group image pair, wherein each pair of images includes a first image and a second image for the same scene, a contrast of the first image is lower than a contrast of the second image (101); a third image is input to the neural network (102); and a fourth image outputted through the neural network map is obtained, the fourth image The contrast is higher than the contrast of the third image (103). The method can enhance the low-contrast image of any input, so that it can achieve the high dynamic range of the multi-exposure fused image, so the contrast-enhanced image is real and the image quality is high.

Description

technical field [0001] The present application relates to the technical field of image processing, and in particular to a method, device and storage medium for enhancing image contrast. Background technique [0002] When digital camera equipment is shooting outdoor scenes or night scenes, because the photosensitive range of the image sensor used, such as CCD (Charge Coupled Device, Charge Coupled Device), is lower than the dynamic range of natural scenes, it is prone to overexposure or underexposure. Therefore, it is necessary to enhance the contrast of the image and improve the display of detailed information in the image, so as to provide a more reliable input image for computer vision recognition. [0003] In related technologies, a single image enhancement algorithm can be used to enhance image contrast. For example, an algorithm based on Retinex theory can be used to enhance image contrast. The principle of this algorithm is to decompose the image into low-frequency lig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T5/50
CPCG06T5/50G06T2207/20084G06T2207/20081G06T2207/20221G06T5/90G06N3/084G06N3/045G06T5/92G06T5/60G06N3/04G06T2207/10144
Inventor 蔡剑锐曹子晟胡攀
Owner SZ DJI TECH CO LTD
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