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An image acquisition method and device

An image acquisition and image technology, applied in the field of image processing, can solve the problems of poor image quality and low image transparency

Active Publication Date: 2020-12-08
ZHEJIANG DAHUA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides an image acquisition method and device, which are used to solve the problems of low image transparency and poor image quality in large magnification scenes in the prior art

Method used

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  • An image acquisition method and device
  • An image acquisition method and device

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Experimental program
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Effect test

Embodiment 1

[0048] figure 2 A schematic diagram of the image acquisition process provided by the embodiment of the present invention, the process includes the following steps:

[0049] S101: Identify a first brightness value of each first pixel point in the first image, and determine a first mean square error of the first image according to the first brightness value of each first pixel point.

[0050] The image acquisition method provided by the embodiment of the present invention is applied to an electronic device, and the electronic device may be an image acquisition device, such as a video camera.

[0051] The electronic device can collect images in real time. In the embodiment of the present invention, the image currently collected by the electronic device is used as the first image. After the electronic device collects the first image, it can identify the first brightness value of each first pixel in the first image, and determine the first average value of the first image accordi...

Embodiment 2

[0064] In order to ensure that the transparency of the collected target image meets the requirements, an accurate mean square error threshold needs to be saved in the electronic device. Therefore, on the basis of the above embodiments, in the embodiment of the present invention, the process of pre-saving the mean square error threshold includes:

[0065] In the wide-angle lens scene, acquire a test image, identify the third brightness value of each third pixel point in the test image, and determine the third brightness value of the test image according to the third brightness value of each third pixel point Three mean square deviations, the third mean square deviation is used as the mean square deviation threshold and saved.

[0066] When saving the mean square error threshold, first adjust the lens to a wide-angle scene, and collect test images in the wide-angle scene. In order to further make the determined mean square error threshold more accurate, you can try to make the te...

Embodiment 3

[0070] In the above-mentioned embodiments, the mean square error of the image is determined according to the brightness value of each pixel in the image, that is, the mean square error of the image is determined based on the global idea, and the mean square error of the image determined in this way may be inaccurate, for example, the edge area of ​​the image When the pixel luminance value is small and the pixel luminance value in other areas is large, the image mean square error determined based on the global idea may be too large or too small. In order to make the determination of the image mean square error more accurate to a certain extent, On the basis of the above embodiments, in the embodiment of the present invention, identifying the brightness value of each pixel in the image, and determining the mean square error of the image according to the brightness value of each pixel includes:

[0071] Divide the image into multiple regions according to preset rules, and for each...

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Abstract

The invention discloses an image acquisition method and device. The method includes: A. determining the first mean square error of the first image; The first contrast and the preset contrast step, determine the second contrast, and acquire the second image; C, determine the second mean square error of the second image; D, determine whether the second mean square error is less than the pre-saved mean square error threshold, If not, use the second image as the target image, if yes, use the second image as the first image, and proceed to step A. When the first mean square error is less than the mean square error threshold, determine the second contrast according to the preset contrast step size, and determine the second image, if the second mean square error of the second image is not less than the pre-saved mean square error threshold, then Determine the second image as the target image, otherwise, continue to adjust the contrast, so as to ensure that the target image has good transparency and good quality.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to an image acquisition method and device. Background technique [0002] With the rapid development of the video surveillance field, the magnification of camera lenses is also increasing, especially in many scenarios, users have higher requirements for the quality of images captured at high magnifications. Due to the limitation of the manufacturing process of the lens itself, as the magnification increases, the transparency of the captured image will decrease, and the low transparency will make the image blurred and affect the image quality. Such as figure 1 as shown, figure 1 The transparency of the two images in is low and the image quality is poor. [0003] In order to solve the problem that the transparency of the image decreases with the increase of the magnification, the existing technology attempts to alleviate the above problem by improving the camera man...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/232
CPCH04N23/64H04N23/80
Inventor 郑佳枫蒋青锋卢二利陈明珠
Owner ZHEJIANG DAHUA TECH CO LTD
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