Information identifying method for machine-readable information card or machine-readable test paper

Abstract

The invention relates to a method for identifying information on a machine-readable information card or a machine-readable test paper. Coordinate marks are set on the machine-readable information card or the machine-readable objective test question and answer test paper, which comprises the following steps: Using symbols, make electronic templates for information cards or test paper options, and store them in the computer; make coordinate mark electronic templates based on the coordinate marks of information cards or test papers, and store them in the computer; collect information cards or test papers through optical image information digital conversion equipment According to the electronic template of the information card or the coordinate mark of the test paper, determine the coordinates of each option area on the digital image, extract the symbolic features of the digital image of each option area, and obtain the symbol information; The symbolic information in each option area is compared with the electronic template of the information card option, and the answer information expressed by the symbolic information in each option area is identified. Adopting the method provided by the present invention not only can identify the traditional information card that adopts the method of filling and painting blocks to answer questions, but also can identify the new type of information card that uses the method of filling and selecting by drawing lines, and it is convenient for answering questions, reducing the rate of wrong answers and machine failure. recognition error rate.

Description

technical field [0001] The invention relates to an information identification method of a machine-readable information card or a machine-readable objective test question and answer test paper. Background technique [0002] Optical Mark Reader (OMR for short) is a fast entry device for computers. It integrates mechanical, optical and electrical technologies, and is widely used in standardized examinations and various statistics due to its fast and reliable performance. OMR first appeared in the 1960s, and now the system is widely used at home and abroad as an information processing system for examinees marking, scoring, statistics and even horse racing. [0003] The cursor reader is a device that uses the principle of photoelectric conversion to convert the optical information symbols on the specified information card into electrical signals that can be processed by the computer. The information card is usually a paper card. There are rectangular or circular marking areas w...

AI Technical Summary

Problems solved by technology

[0008] d. There is no original image information, and if an error is found, only the original card can be checked, which is extremely inconvenient

[0009] In the later period, the method of using high-speed scanner to digitally convert the image of the information card, and after the coordinate positioning of the image of the information card, the method of identifying the density and grayscale of the option area, this method has a certain progress compared with the cursor reader, but due to It is to identify the density and grayscale of the option area, so it can only identify the information card of the filled block, and cannot identify the new information card that uses the line drawing filling method, and the options that have been erased on the filled answer sheet still exist possibility of misidentification

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