Decoding method of the barcode displayed on the mobile phone

Abstract

A method for decoding the barcode displayed on the mobile phone. Firstly, the image of the barcode displayed on the mobile phone is collected and decoded in an alternate row and column manner. If the decoding fails, the mobile phone screen area is determined, and the selected mobile phone screen area is fully collected to obtain a complete image. The barcode image is then decoded. The present invention meets the decoding requirements at short distances by interleaving images with rows and columns; and at long distances, the images collected after positioning the screen area of ​​the mobile phone can also be decoded normally, which improves the decoding range, and the images collected at intervals of rows and columns Or the size of the image data positioned on the screen area of ​​the mobile phone is much smaller than that of the full image data, so the data that needs to be processed in the barcode decoding operation is also greatly reduced, and the required calculation amount is also reduced, which can save decoding time, and at the same time, the RAM space is insufficient. , it can also be decoded smoothly.

Description

technical field [0001] The invention relates to a decoding method of a barcode displayed on a mobile phone. Background technique [0002] At present, while users require a good reading rate for barcode scanning devices, such as ticket verification terminals and scanning guns, they also hope that they have a wider reading range. Due to the requirement of low cost, the optional decoding chip configuration is not too high, and the storage space of a pair of images such as VGA (640*480) has reached 300KB, and the problem often encountered at this time is RAM Insufficient space; at this time, there are two methods that are often used: the first is to decode the image after collecting the image every row and every column, but this method will sacrifice some effective pixels and shorten the decoding range; the second is The image is fully collected, but the collection range is reduced, so that the required image space will be reduced, but this method will sacrifice a part of the f...

AI Technical Summary

Problems solved by technology

When the collection distance is short, the barcode resolution in the image is high, and the adjacent row and column information is repeated, and the method of interlacing rows and columns will not lose image information; on the contrary, when the distance is long, the image collected has a wide viewing angle, and the barcode in the image becomes smaller , the resolution becomes lower, and the barcode information will inevitably be lost if the method of interlacing is used

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