VLSI realizing system and method of histogram equalization image processing

A histogram equalization and image processing technology, applied in the field of image processing, to achieve fast running speed, correction of loss of details, and low cost

Inactive Publication Date: 2008-01-30
CHENGDU FINCHOS ELECTRONICS
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Problems solved by technology

[0010] In order to solve the above problems, the present invention discloses a VLSI implementation system and method for histogram gray level balance based on statistical characteristic correction, which can improve the overall dark or bright phenomenon of digital images caused by uneven gray level distribution. , complete the processing of grayscale transformation, rationalize the grayscale distribution of the image, and be more suitable for subsequent image processing of fingerprint recognition

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  • VLSI realizing system and method of histogram equalization image processing
  • VLSI realizing system and method of histogram equalization image processing
  • VLSI realizing system and method of histogram equalization image processing

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Embodiment Construction

[0062] The VLSI implementation system of histogram equalization image processing based on statistical characteristic correction disclosed by the present invention mainly includes the following modules, see Fig. 1 system block diagram (Diagram 1)

[0063] 1. Noise reduction and image block unit 1, used to divide the image into a series of small image blocks, carry out noise suppression processing on the small image blocks, improve image quality, and reduce the difficulty of extracting fingerprint feature points in the later stage.

[0064] 2. Image Buffer read controller 2 (Image Buffer read controller) (inconsistent with the noise reduction, image block unit and image buffer read controller in the attached drawing)

[0065] The controller is used to complete the spatial access to the image, control the content of the image in real time, and send it out in sequence according to a certain time interval. Before each image data block is sent out, the data processing of the block i...

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Abstract

A VLSI implementation system of a revised histogram equalization image based on statistical property comprises a block scanning element, a cumulative distribution function unit, a mean value, a variance analysis unit, a mapping table, an amendment element of grey mapping function, a grey mapping processing unit. The invention can improve the phenomenon of integral dark and integral bright caused by the uneven grayscale distribution of the digital image, which reasonably allocates distribution of the grayscale of the image and is suitable for the sequential image treatment processing of fingerprint identification.

Description

technical field [0001] The present invention relates to image processing technology, in particular to a VLSI (Very Large Scale Integrated Circuit) implementation system and method based on a histogram gray balance modified by statistical characteristics Background technique [0002] The histogram reflects the gray distribution information of the image. Therefore, the histogram is often used in image processing to analyze and process the image to realize gray adjustment and threshold generation. The purpose is to: realize the generation of the threshold value of the binarization process, and select the appropriate threshold value to binarize the image. Implement threshold generation in image segmentation. Extract the effective part of the image and extract the image content of interest. Due to the different purposes of use, the histogram is a classic way of using threshold generation. [0003] The existing histogram implementation systems for fingerprint identification mos...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/38G06T5/40
Inventor 薛云波
Owner CHENGDU FINCHOS ELECTRONICS
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