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Image processing method and device

An image processing and image technology, which is applied in the field of image processing, can solve the problems of not considering the overall distribution of image brightness and the range of light and dark areas, unsatisfactory image processing effects, and expansion of strong light range, etc., to achieve the effect of improving visual visual features

Active Publication Date: 2015-04-15
XIAOMI INC
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Problems solved by technology

[0002] In related technologies, due to the overexposure of the camera or camera acquisition system and the excessive enhancement of the local strong light by the night vision image enhancement algorithm, the range of strong light in the image is further expanded, and the surrounding information of the strong light is lost, so that the image cannot clearly display the captured light. object
In the related technology, by locating a strong light source, the strong light source is weakened to achieve the purpose of making the image clear, but this technology only processes the strong light with a brightness value of 255 in the image, and uses this threshold (255) to process the image. The binary processing does not consider the overall distribution of image brightness and the range of light and dark areas, and the image processing effect is not ideal

Method used

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Embodiment 1

[0097] Embodiment 1 Using the image processing method provided by the embodiment of the present disclosure, the Figure 5 The image in is processed, Figure 5 Due to the high brightness of the headlights of the oncoming car in the image, the information around the headlights cannot be seen clearly. Using the image processing method provided by the embodiment of the present disclosure Figure 5 The image in is processed, such as Figure 6 Shown, this method can be carried out by computer, and computer carries out following operations next:

[0098] In step S601, the area where the headlight of the oncoming vehicle is located is determined as the light source area of ​​the image.

[0099] In step S602, the shadow area of ​​the car and the person is determined as the shadow area of ​​the image.

[0100] In step S603, brightness smoothing processing is performed on the area where the vehicle light is located.

[0101] In step S604, the contrast between shadow areas of vehicles...

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Abstract

The invention relates to an image processing method and device for improving visual characteristics of an image. The method comprises the following steps: determining a light source region and an excessively dark region of the image, wherein the brightness of the excessively dark region is lower than that of the light source region, the ratio of the brightness values of the excessively dark region and the light source region is equal to or less than a preset ratio, and the excessively dark region comprises an object region and a shadow region; identifying the object region and the shadow region in the excessively dark region according to the light source region; performing brightness adjustment on the light source region, the object region and the shadow region of the image respectively to enable the visual characteristics of the adjusted image to be superior to the initial visual characteristics of the image, wherein the brightness adjustment range of the shadow region is smaller than that of the object region, so that the smooth continuity of different processing regions is guaranteed while the brightness of the processed image is improved, and the visual characteristics of the image is improved.

Description

technical field [0001] The present disclosure relates to the field of image processing, in particular to an image processing method and device. Background technique [0002] In related technologies, due to the overexposure of the camera or camera acquisition system and the excessive enhancement of the local strong light by the night vision image enhancement algorithm, the range of strong light in the image is further expanded, and the surrounding information of the strong light is lost, so that the image cannot clearly display the captured light. object. In the related technology, by locating a strong light source, the strong light source is weakened to achieve the purpose of making the image clear, but this technology only processes the strong light with a brightness value of 255 in the image, and uses this threshold (255) to process the image. The binary processing does not consider the overall distribution of image brightness and the range of light and dark areas, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
Inventor 陈志军侯文迪关亚勇
Owner XIAOMI INC
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