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

Abstract

The invention involves an information identification method for machine-readable information card or machine-readable answer paper of examinations. There are coordinate labels in machine-readable information card or machine-readable answer paper for objective questions. The method includes following steps: according to the symbols from the selected option in information card or answer paper of examination, build electronic templates of them and store into computer; according to the coordinate labels build electronic template of coordinate labels and store in computer; acquire digital images of information card or answer paper by digital conversion equipments for optical image information, and store into computer; according to coordinate label electronic template, determine the coordinates of each option in the digital images, retrieve the symbol characteristics from the digital image of each option region to get the symbol information; compare the obtained symbol information with the electronic templates to get the answer information represented by the symbols in each option region.

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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