Frame-skipping scanning and recognizing device and method

Abstract

The invention discloses a frame-skipping scanning and recognizing device and method, belonging to the field of computer peripheral equipment. The device comprises an optical sensor for taking images and a control module for processing the images and recognizing characters, wherein the optical sensor is used for continuously taking images of scanned characters so as to obtain an image frame sequence containing the scanned characters; the control module carries out downsampling on the image frame sequence according to scanning speed, the downsampled image frames are used as sampled frames, image frames not subjected to downsampling are used as skipping frames, the quantity of the skipping frames adjacent to the sampled frames is more than zero; and all the sampled frames obtained after downsampling are spliced, the character recognition and storage are carried out on a spliced panoramic image in sequence, and the character codes of the scanned characters are obtained. In the invention, image frames in the image frame sequence acquired by the optical sensor are screened through the control module, the obtained image frames to be spliced are spliced according to overlapping contents, and the splicing speed of the whole image frame sequence is improved.

Description

technical field [0001] The invention belongs to the field of computer peripheral equipment, and relates to a frame skipping scanning recognition device and method, in particular to a device and method for scanning and recognizing a selected character sequence. Background technique [0002] Electronic scanning pen (abbreviated as scanning pen) is one of the important applications of OCR. The optical camera of the scanning pen continuously takes pictures of the scanned data according to a certain frequency, obtains the image frame sequence of the scanned data, and then stitches the image frame sequence into a panoramic image for OCR processing. [0003] With the improvement of hardware technology, in order to increase the peak scanning speed supported by the scanning pen and improve the user experience, the sampling frequency of the optical sensor used by the scanning pen is getting higher and higher, such as collecting 120 image frames per second or even higher. When the sam...

AI Technical Summary

Problems solved by technology

But the signal control unit of this invention can only combine each image frame vertically and horizontally with the previous image frame by overlapping content, so every two adjacent image frames must be combined, when the sampling rate of the scanning pen is too high When it is high, the content overlap ratio of two adjacent image frames is very large, and it is not necessary for the signal control unit to stitch all the image frames collected by the optical sensor in a pairwise combination, which not only makes the load of the control module It is greatly aggravated, takes up hardware resources, and also reduces the splicing speed of the entire image frame sequence

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