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Image strong light suppression adaptive control method and device

A technology of adaptive control and strong light suppression, which is applied in the field of image processing, can solve problems such as difficulty in adapting to all-weather application environments, and achieve the effect of improving image effects and avoiding overexposure

Active Publication Date: 2018-11-30
SHENZHEN INFINOVA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, both methods are difficult to adapt to the all-weather application environment

Method used

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  • Image strong light suppression adaptive control method and device
  • Image strong light suppression adaptive control method and device
  • Image strong light suppression adaptive control method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] In the above, in the step S1, the images include multiple images, and the multiple images are continuously / interval acquired from the video.

[0080] In this embodiment, the source of the images may be continuous images in the video, or images at intervals. For the case of continuous images, image adjustment is the most real-time, but requires higher hardware resources and costs more. After trial and error, the discriminative exposure control of the present invention can also achieve a better balance of hardware cost and effect by acquiring images from video at intervals.

Embodiment 2

[0082] In the above, in the step S6,

[0083] The calculation of the overexposure weight includes the steps of,

[0084] S61) Judging whether the proportion of the high-brightness area meets the preset range, if yes, go to step S62, otherwise go to step S63;

[0085] S62) Pass the formula: overexposure weight=32×e (-过曝区域占比 / 2) Calculate the overexposure weight;

[0086] S63) If it is judged that the proportion of the high-brightness area is lower than the preset range, the lower limit of the preset range is used as the overexposure weight; the proportion of the high-brightness area is lower than the preset range, and the upper limit of the preset range is used as the overexposure weight Weights.

[0087] This embodiment provides an optimization solution for calculating the overexposure weight by judging details. In this solution, firstly, judge whether the proportion of the identified high-brightness area of ​​the screen meets the preset range. If it meets the calculation f...

Embodiment 3

[0089] In the above, the step S2 obtains the histogram Hist[256] of the image;

[0090] The average brightness light_ave and weighted average brightness light_ave_wt in the step S7 are calculated by the following formula:

[0091]

[0092]

[0093] In the formula, i is the gray value in the histogram.

[0094] This embodiment provides a method for calculating the average luminance and the weighted average luminance, which the applicant found through a large number of experiments to be simple and accurate.

[0095] The present invention also provides an image strong light suppression adaptive control device, comprising

[0096] The obtaining module is used to obtain at least one frame image in the video, and then transfers to the histogram module;

[0097] The histogram module is used to obtain the histogram of the image and then go to the region segmentation module;

[0098] The area segmentation module is used to divide the brightness of each area of ​​the image into...

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Abstract

The present invention provides an image glare suppression adaptive control method, by obtaining the histogram of the image in the video, through brightness region discrimination, brightness region proportion statistics and high brightness weight, overexposure weight, average brightness and weighted average brightness to calculate the final After marking the brightness state of the image, the preset exposure adjustment value is determined, so as to control the exposure increase and decrease of the image. Thus, the overall image effect is improved, and it is suitable for adaptively controlling exposure in all-weather and various contrasting strong light scenes.

Description

technical field [0001] The invention relates to the field of image processing, in particular to an image strong light suppression adaptive control method and device. Background technique [0002] Due to the limitations of the electronic image sensor, the latitude of the acquired image is not high, that is, the level of light and dark differences that the picture can accommodate is not high, especially when the image contains a particularly strong light source (such as street lamps, the sun, etc.), it is limited by the latitude , the details of the image information obtained in the rest of the screen will become very poor. Especially for the security field, it is necessary to continuously acquire images for video. For example, strong light is common in road monitoring. It can be seen that for many image processing applications, the demand for strong light suppression is very strong. [0003] In the prior art, there are various strong light suppression means, for example, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/235
CPCH04N23/70
Inventor 杨兵李修新
Owner SHENZHEN INFINOVA
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