A correction table generation method, device and image correction method

Abstract

The invention provides a correction table generation method and device and an image correction method, wherein the method and device are applied to a scanning device which comprises a plurality of sampling units. The method comprises the following steps of scanning a target object in a preset exposure time period; sampling the target object through a plurality of sampling units to obtain a voltagevalue corresponding to each sampling unit in a preset exposure time period; if the preset exposure time period meets the preset condition, determining a correction coefficient corresponding to each sampling unit according to the voltage value and a preset threshold value corresponding to each sampling unit; and generating a correction table corresponding to the scanning equipment according to thecorrection coefficient corresponding to each sampling unit. According to the embodiment of the invention, all programs are set in the scanner, only the scanner is used for scanning the target objectto generate the normalization correction table, and a large amount of data communication between the upper computer and the scanner is not needed, so that the complexity degree of the system is reduced.

Description

technical field [0001] The present application relates to the technical field of scanner calibration, in particular, to a calibration table generation method, device and image calibration method. Background technique [0002] The scanning head of the fixed contact image CIS sensor scanner uses a CIS sensor, and the scanning head does not move during the scanning process, and the scanned object moves. In order to ensure the quality of the scanned image output by the CIS sensor scanner, it is necessary to use a normalization correction table to perform regular normalization calibration on the CIS sensor scanner when it leaves the factory and during operation. [0003] At present, the process of generating the normalization correction table of the CIS sensor scanner is as follows: the host computer controls the scanner sampling according to the set light length gradient interval and step value, and the scanner performs multi-scale scanning on the scanned part according to the g...

AI Technical Summary

Problems solved by technology

[0004] In the process of generating the above-mentioned CIS sensor scanner normalization correction table, the scanner needs to perform data sampling, and at the same time, the upper computer needs to analyze the data sampled by the scanner. In the above process, the upper computer and the scanner need to perform a large amount of data communication As a result, the complexity of the system increases, and in the process of generating the normalized correction table, it is inefficient to use traversal to perform multiple samplings to find the optimal light length.

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