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High performance parallel multiplying-adding circuit applied to 8-bit grayscale image matching

A gray-scale image, high-performance technology, applied in image data processing, image data processing, instruments, etc., can solve problems such as multiple DSP resources, achieve the effect of improving the overall circuit performance and facilitating modification and transplantation

Active Publication Date: 2014-06-04
TIANJIN JINHANG COMP TECH RES INST
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Problems solved by technology

In order to achieve high-performance parallelism, the product correlation matching circuit in the prior art needs to use a large number of DSP resources

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  • High performance parallel multiplying-adding circuit applied to 8-bit grayscale image matching
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  • High performance parallel multiplying-adding circuit applied to 8-bit grayscale image matching

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Embodiment Construction

[0039] A high-performance parallel multiply-accumulate circuit applied to 8-bit grayscale image matching of the present invention will be described in detail below with reference to the drawings and embodiments.

[0040] A high-performance parallel multiply-accumulate circuit applied to 8-bit grayscale image matching of the present invention includes a pairing circuit, a data combination circuit, an XtremeDSP, a data splitting circuit and an addition and accumulation circuit.

[0041] Let the size of the small graph and the relevant subgraph of the matching large graph be m*n, when starting to compare the small graph B mn and associated subgraph A uv When performing the matching operation, the pairing circuit takes out the image data points of two corresponding rows each time in the buffer area of ​​the small picture and the relevant sub-picture according to the order of the rows, and it is assumed that the i-th row B of the small picture is taken out i0 B i1 B i2 …B in-2 ...

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Abstract

The invention belongs to the field of the hardware design technology, and in particular relates to a high performance parallel multiplying-adding circuit applied to 8-bit grayscale image matching. The circuit of the invention comprises a matching circuit, a data combination circuit, an XtremeDSP, a data partition circuit and an accumulation circuit. The technical problem in the prior art that the multiplicative-correlation matching circuit occupies too much of the DSP resource is solved; and with use of half of the DSP resource of a conventional circuit, the parallel multiplying-adding operation performance equal to that of the conventional circuit is obtained.

Description

technical field [0001] The invention belongs to the technical field of hardware design, and in particular relates to a high-performance parallel multiply-add circuit applied to 8-bit grayscale image matching. Background technique [0002] In many fields such as image processing, pattern recognition, and information search, it is necessary to perform matching operations on images to examine the correlation of images. Among them, 8-bit grayscale images are the most common image format. For matching algorithms, there are many kinds of matching algorithms, such as absolute difference, mean square error, and product correlation. Among these algorithms, the product correlation matching algorithm has the advantages of high precision, strong adaptability, and good robustness, and has been widely used. In engineering practice, normalized product correlation with demean value is often used. [0003] The product correlation image matching operation refers to traversing and calculating...

Claims

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Application Information

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IPC IPC(8): G06T1/00
Inventor 王可叶旭鸣曾永红
Owner TIANJIN JINHANG COMP TECH RES INST
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