An intelligent identification and analysis method for an examination answer sheet system
A technology of intelligent recognition and analysis methods, applied in image analysis, character and pattern recognition, image data processing and other directions, can solve problems such as image instability, and achieve intelligent high-speed recognition, high efficiency, and high image accuracy.
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[0025] 1. Image preprocessing technology
[0026] 1.1 Image grayscale
[0027] The color of each pixel of a color image is composed of three color components: red (R), green (G), and blue (B). The RGB color mode is based on optical principles. Each color has 255 kinds of grayscale values can be taken, 0 represents the darkest black, otherwise 255 represents white. A grayscale image is a special color image in which the three component values of R, G, and B are set to be the same. The image feature description of the grayscale image has not changed, and it can still reflect the overall and local brightness and chromaticity characteristics of the entire image.
[0028] Image grayscale is the process of converting a color image into a grayscale image. Since the processing of color images requires three channels of RGB, the time overhead is relatively large. Image grayscale is to convert the data transmission of three channels into a single channel, which can reduce the amo...
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