Method and device for recognizing test paper score
A recognition method and test paper technology, applied in character and pattern recognition, instruments, computer parts, etc., can solve the problems of error-prone, high cost, large manpower and material resources, and achieve accurate and efficient recognition, easy operation and simple structure. Effect
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Embodiment 1
[0047] The operation steps of the identification method of the paper surface score are as follows:
[0048] 1. Preprocessing steps before sample training:
[0049]Firstly, the region of interest (ROI) printed on the test paper is generated through a video capture card to generate an analog signal, and then converted into a 256-color digital signal by analog-to-digital conversion and input to the computer. The paper thickness, whiteness, smoothness, writing strength, quality of strokes, and the brightness and angle of the light during shooting will all cause changes in the shape of the characters, resulting in interference such as stains, whiteness, broken pens, and cross-linking. Therefore, generally, the digitized characters obtained by photographing still need various further processings.
[0050] The processing process includes 256-color conversion to grayscale image, binarization of grayscale image, edge sharpening and denoising, overall tilt adjustment of the number part...
Embodiment 2
[0144] Referring to Fig. 9, the examination paper surface score recognition device adopts the above-mentioned test paper surface score recognition method for operation and use, and includes a table 8 for placing the test paper 9, and 4 adjustable columns 5 are set on the table 8 to support a piece with the table 8 The upper panel 1 arranged in parallel; the upper panel 1 is equipped with: a camera 2 aimed at the score of the test paper 9, a laser light 3 illuminating the score area of the test paper 9 and 4 auxiliary lights to illuminate the test paper 9; the camera 2. Connect a computer 7 via the data acquisition card 6. The camera 2 acquires the image of the score area on the test paper surface 9, and sends it to the computer 7 through the data acquisition card 6, and the computer 7 processes the image and recognizes the score, and generates a report.
[0145] The operation steps of this device are as follows:
[0146] (1) Place the test paper 9 to be identified on the ta...
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