Fractional order differential filter for digital image

Abstract

The digital image fractional differential filter proposed by the present invention is a signal processing circuit device for real-time enhancement of complex texture details of digital images. The fractional order differential filter of the digital image is composed of a digital video popular memory group, a phase lock / shift circuit group, a fractional order differential mask convolution circuit and a maximum value comparator in a cascaded manner. The operation rule of the first algorithm unit circuit to the eighth algorithm unit circuit in the fractional differential mask convolution circuit is to use the scheme of fractional differential mask convolution to realize spatial filtering of digital image fractional differential. The digital image fractional differential filter circuit proposed by the present invention has simple structure, concise operation rules, good texture detail enhancement effect, and high real-time performance, and is especially suitable for high-definition digital television, biomedical images, bank notes, and satellite remote sensing images. Applications such as real-time enhancement of complex texture details such as biometric images.

Description

[0001] Field of study [0002] The fractional differential filter of digital image proposed by the present invention is a signal processing circuit device for real-time enhancement of complex texture detail features of digital image. The order of the fractional differential involved in the present invention is not the traditional integer order, but a non-integer order, and generally takes fractions or rational decimals in engineering applications. See figure 1 , the fractional differential filter of this digital image is composed of a digital video memory bank 9, a phase lock / shift circuit bank 10, a fractional differential mask convolution circuit 11 and a maximum value comparator 12 in a cascaded manner . The operation rules of the first algorithm unit circuit 1 to the eighth algorithm unit circuit 8 in the fractional differential mask convolution circuit 11 are to use the fractional differential mask convolution scheme to realize the spatial filtering of the digital image f...

AI Technical Summary

Problems solved by technology

This kind of comprehensive application is actually equivalent to the information fusion of the processing results of various traditional texture analysis schemes, but this greatly consumes computing resources, reduces processing efficiency, and cannot meet the real-time requirements of computing.

[0005] For nearly three hundred years, fractional calculus has become an important branch in the field of mathematical analysis, but it is still little known to most scholars in engineering and technology

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