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Method and apparatus for switching region of interest

A technology of region of interest and switching device, which is applied in the field of region of interest switching method and device, can solve the problems of insufficient exposure of the region of interest, easy to be affected by illumination, and reduce the scope of application, so as to facilitate identification and abnormal judgment, image Satisfied brightness and clear details

Active Publication Date: 2017-08-01
SHENZHEN STREAMING VIDEO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a method for switching regions of interest, which aims to solve the problem that the existing vehicle-mounted front-facing imaging equipment is easily affected by the illuminance. Local overexposure or underexposure occurs in the area of ​​interest, which reduces the scope of application and is not conducive to the promotion and application of vehicle-mounted front-end imaging equipment.

Method used

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  • Method and apparatus for switching region of interest

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Experimental program
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Embodiment 1

[0028] figure 1 It is an implementation flowchart of the method for switching regions of interest provided by the embodiment of the present invention, and is described in detail as follows:

[0029] In step S101, an image of a frame before exposure is acquired;

[0030] Step S101, specifically:

[0031] During the driving process, the image of the previous frame of the current exposure image is obtained. In step S102, output the luminance value of each subregion of the image, the accumulated number of pixels lower than the first set threshold, and the accumulated number of pixels higher than the second set threshold to generate evaluation data;

[0032] In step S103, according to the evaluation data and the preset illuminance evaluation area distribution table, feature values ​​of a plurality of illuminance evaluation areas are generated;

[0033] Wherein, step S103 is specifically:

[0034] The preset evaluation area distribution divides the entire image into multiple are...

Embodiment 2

[0051] The embodiment of the present invention describes the composition of multiple illuminance evaluation areas, which are described in detail as follows:

[0052] The plurality of illuminance evaluation areas include the front area, the center area of ​​the image and the areas on both sides of the vehicle.

[0053] refer to figure 2 , figure 2 It is a better sample diagram of multiple illuminance evaluation areas provided by the embodiment of the present invention.

[0054] The two upper THR0, the middle THR1 and the lower two THR2 are representative five small windows.

[0055] Wherein, THR0 represents the area directly in front, that is, the area directly in front of the vehicle.

[0056] Among them, THR1 represents the central region of the image.

[0057] Among them, THR2 represents the area on both sides of the vehicle.

Embodiment 3

[0059] image 3 It is an implementation flowchart of step S104 of the region of interest switching method provided by the embodiment of the present invention, and is described in detail as follows:

[0060] S301, judging whether the luminance ratios of the plurality of illuminance evaluation areas are all within a set range;

[0061] S302. When the luminance ratios of the plurality of illuminance evaluation areas are all within a set range, determine that the illuminance of the environment where the vehicle is located is a normal illuminance;

[0062] S303, when the luminance ratios of the plurality of illuminance evaluation areas are not within the set range, and the luminance average value corresponding to the area directly in front is higher than the luminance average value corresponding to the areas on both sides of the vehicle, determine that the illuminance of the environment where the vehicle is located is low Illumination;

[0063] Wherein, the brightness ratio is th...

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Abstract

The present invention is suitable for the technical field of vehicle monitoring, and provides a method and an apparatus for switching a region of interest, the method comprising: obtaining a frame of an image before exposure; outputting a luminance value of each partition of the image, accumulation number of pixels lower than a first set threshold, accumulation number of pixels higher than a second set threshold, to generate an evaluation data; generating eigenvalues of a plurality of illuminance evaluation areas based on the evaluation data and the preset illuminance evaluation area distribution table; estimating the illuminance of an environment of a vehicle according to the eigenvalues of the plurality of illuminance evaluation areas and differentiation characteristics between normal illuminance and low illuminance; switching the region of interest of a current exposing image based on the estimating results, generating a weight table based on the content of the current exposing image and the switched region of interest, controlling the exposing of the region of interest based on the weight table. The present invention makes image partitions which is concerned by the monitoring required areas and the intelligent algorithm are highlighted in details, so that to facilitate recognition and abnormality estimation, which makes the details clear while avoid overexposing the region of interest.

Description

technical field [0001] The invention belongs to the field of vehicle monitoring, and in particular relates to a method and device for switching regions of interest. Background technique [0002] With the popularization of vehicle-mounted front-end imaging equipment, many vehicles are equipped with vehicle-mounted front-end imaging equipment. The vehicle-mounted front-end imaging equipment is mainly installed in the front of the car, which has the function of a driving recorder and can be used to monitor the driving process. The driving situation in front of the vehicle and on the left and right sides of the vehicle, and record all the images in the direction of the vehicle during the driving process. Its purpose is mainly to effectively obtain evidence in the event of a traffic accident, and at the same time, it can also record the beautiful scenery and driving trajectory along your self-driving tour. In addition, it also provides reliable data for intelligent algorithms suc...

Claims

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Application Information

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IPC IPC(8): H04N7/18H04N5/243G06V10/22G06V10/25G06V10/50
CPCH04N7/18H04N23/76G06V20/56G06V10/22G06V10/25G06V10/50H04N23/73H04N23/71H04N25/443H04N25/533H04N25/583G06T7/11
Inventor 邓宝华刘文涛
Owner SHENZHEN STREAMING VIDEO TECH