Realtime picture quality determiing method

Abstract

The present invention is a method for judging image quality in real time, which comprises the following steps: when there is a one-dimensional pixel in an image frame, the brightness of the pixels on both sides of a pixel is smaller than the brightness of the pixel by a certain degree, then judging that the brightness of the pixel is one the upper peak; when there is a pixel in the one-dimensional pixel of the image, the brightness of the pixels on both sides is greater than the brightness of the pixel to a certain extent, then it is judged that the brightness of the pixel is the lower peak; in addition, when the one-dimensional pixel of the image, the edge Even if the luminance of a pixel is the maximum value, it is not judged as an upper peak, and even if the luminance of an edge pixel is the minimum value, it is not judged as a lower peak. When the number of peaks of the image frame meets the requirements, it is determined that the image frame is a good image frame; otherwise, it is determined that the image frame is a bad image frame.

Description

field of invention [0001] The invention relates to a method for judging image quality in real time. Background technique [0002] The optical navigation sensor (optical navigation sensor) is based on the images collected at different times, and compares the correlation of the images collected at different times to judge the displacement of the optical navigation sensor. Therefore, the quality of the image will determine the judgment of the optical navigation sensor. As a result of the amount of displacement, the reason that affects the image quality is generally noise, the optical steering sensor is not aligned with the focus to blur the image, and the light source will also affect the quality of the image. For example, the LED light source used by the optical steering sensor has a fixed brightness. To prevent the wrong judgment of the displacement due to the unstable brightness of the light source, but when the light source of the optical manipu...

AI Technical Summary

Problems solved by technology

[0002] The optical navigation sensor (optical navigation sensor) is based on the images collected at different times, and compares the correlation of the images collected at different times to judge the displacement of the optical navigation sensor. Therefore, the quality of the image will determine the judgment of the optical navigation sensor. As a result of the amount of displacement, the reason that affects the image quality is generally noise, the optical steering sensor is not aligned with the focus to blur the image, and the light source will also affect the quality of the image. For example, the LED light source used by the optical steering sensor has a fixed brightness. To prevent the misjudgment of the displacement due to the unstable brightness of the light source, but when the light source of the optical manipulation sensor is added with a 60Hz or 50Hz fluorescent light source, the brightness has a periodic change, which will cause the image collected by the optical manipulation sensor There is a flickering phenomenon, which causes an error in the judgment of the displacement

[0003] The disadvantage of the existing technology is that it needs several images to judge the image quality, and judge whether the image sensor is in focus according to the correlation of several images, so many buffers and a delay time are required in hardware implementation

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