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Method and device for adjusting brightness

A technology of brightness adjustment and brightness value, which is applied in the field of image processing and can solve problems such as brightness difference at seams

Active Publication Date: 2019-12-24
ZHEJIANG DAHUA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a brightness adjustment method and device to solve the problem in the prior art that the brightness difference at the stitching seam is obvious during image stitching

Method used

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  • Method and device for adjusting brightness

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Experimental program
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Effect test

Embodiment 1

[0053] figure 1 A schematic diagram of a brightness adjustment process provided by an embodiment of the present invention, the process includes the following steps:

[0054] S101: For the first image and the second image to be stitched, determine a first overlapping viewing area in the first image and a second overlapping viewing area in the second image.

[0055] The brightness adjustment method provided by the embodiment of the present invention is applied to electronic equipment, and the electronic equipment may be a PC, a tablet computer or the like, or may be an image acquisition device.

[0056] The image acquisition device can perform image acquisition. The first image and the second image in the embodiment of the present invention can be acquired by the same image acquisition device, or can be acquired by two different image acquisition devices. The electronic device can acquire the first image and the second image collected by the image acquisition device, wherein th...

Embodiment 2

[0068] In order to make the first target brightness value corresponding to the determined first brightness value more accurate, after each second pixel point corresponding to each first pixel point of the first brightness value is determined for the first brightness value, after On the basis of the above-mentioned embodiments, in the embodiment of the present invention, each first pixel point according to the first brightness value in the first overlapping viewing area, and the second overlapping viewing area and the The second luminance value of each second pixel point corresponding to each first pixel point, and determining the first target luminance value corresponding to the first luminance value includes:

[0069] For each second pixel, determine whether the absolute value of the difference between the second brightness value of the second pixel and the first brightness value is greater than a preset brightness threshold, and if so, filter out the second pixel;

[0070] j...

Embodiment 3

[0083] In order to ensure that the first image after brightness adjustment is not distorted, on the basis of the above embodiments, in the embodiment of the present invention, for each first brightness value within the preset range, according to the first overlapping Each first pixel point of the first brightness value in the viewing area, and the second brightness value of each second pixel point corresponding to each first pixel point in the second overlapping viewing area, determine the Before the first target brightness value corresponding to the first brightness value, the method further includes:

[0084] Judging whether the first brightness value is 0 or 255, if not, proceed to the next step.

[0085] If the first brightness value is 0 or 255, the method further includes determining a first target brightness value corresponding to the first brightness value as 0 or 255.

[0086] The first brightness value within the preset range includes 0-255. When adjusting the brigh...

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Abstract

The present invention discloses a method and device for adjusting brightness. The method includes: determining a first overlapping viewing area and a second overlapping viewing area for a first image and a second image to be spliced; for each first brightness value, Determine the first target brightness value corresponding to the first brightness value; adjust the brightness value of each third pixel point of the first brightness value in the first image according to the first target brightness value corresponding to each first brightness value to The first target brightness value. Because in the embodiment of the present invention, according to each first pixel point of the first brightness value in the first overlapping viewing area, and each second pixel point corresponding to each first pixel point in the second overlapping viewing area The second brightness value of the first brightness value, determine the first target brightness value corresponding to the first brightness value, and then adjust the brightness value of each third pixel point of each first brightness value in the first image to the corresponding first target brightness value The luminance value, therefore, can eliminate the luminance difference at the stitching seam between the first image and the second image.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a brightness adjustment method and device. Background technique [0002] Today, with the rapid development of the monitoring system, the scale of the system is getting larger and larger, and there are more and more monitoring points. With the continuous expansion of the monitoring range, the field of view of most image acquisition devices cannot meet the requirements of users, so image stitching technology has emerged as the times require. According to the overlapping viewing area in the two images, the two images are spliced ​​to meet the user's needs for the monitoring range. When splicing images, it is necessary to adjust the brightness of the spliced ​​images. [0003] A medical digital image mosaic method is provided in the prior art, which adjusts the brightness of the image through a method of brightness histogram equalization, so that the statistical characteristics of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/262H04N5/232G06T5/00G06T3/40
CPCH04N5/262G06T3/4038G06T5/007H04N23/80
Inventor 蒙诚哲卢维
Owner ZHEJIANG DAHUA TECH CO LTD
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