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HSV color space-based document image processing method and system

A document image, color space technology, applied in the field of image processing, to achieve the effect of retaining effective pixels, saving manpower and time

Pending Publication Date: 2021-10-22
宁波华高信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of document image processing method based on HSV color space, in order to solve the problem of extracting key information from image;

Method used

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  • HSV color space-based document image processing method and system
  • HSV color space-based document image processing method and system
  • HSV color space-based document image processing method and system

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Experimental program
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Embodiment 1

[0045] Such as figure 1 Shown, a kind of document image processing method based on HSV color space of the present invention comprises steps:

[0046] S1. Acquire the document image, and use the acquired RGB value of the document image.

[0047] S2. Convert the RGB values ​​into corresponding HSV values ​​to obtain a document image based on the HSV color space.

[0048] S3. Establish three channel masks respectively for hue, saturation and lightness, and pass the document image based on the HSV color space through the three mask channels respectively to obtain a filter mask of the target color.

[0049] Among them, such as figure 2 As shown, the steps to create three mask channels include:

[0050] A1, establish three channels that are respectively hue (H), saturation (S) and lightness (V);

[0051] A2. Set the filtering values ​​of the three channels to obtain three channel masks.

[0052] Such as image 3 As shown, the step of obtaining the filter mask of the target co...

Embodiment 2

[0063] Such as Figure 8 Shown, a kind of document image processing system based on HSV color space of the present invention comprises:

[0064] The image acquisition module is used to acquire the document image, and according to the RGB value of the acquired document image;

[0065] An image conversion module, configured to convert the RGB value into a corresponding HSV value to obtain a document image based on the HSV color space;

[0066] A mask filter module, used to pass the document image based on the HSV color space through three mask channels respectively to obtain the filter mask of the target color;

[0067] The connected region analysis module is used to analyze the connected region of the filter mask of the target color to obtain the connected region of the target color.

[0068] Among them, the mask filtering module includes:

[0069] A separation unit for separating the document image based on the HSV color space into three channels, namely hue, saturation and...

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Abstract

The invention belongs to the technical field of image processing, and provides an HSV color space-based document image processing method, which comprises the following steps of: acquiring a document image, and acquiring an RGB value of the document image according to the acquired RGB value of the document image; converting the RGB value into a corresponding HSV value to obtain a document image based on an HSV color space; establishing three channel masks which are hue, saturation and brightness respectively, and enabling the document image based on the HSV color space to pass through the three mask channels respectively to obtain a filtering mask of a target color; and performing connected region analysis on the filtering mask of the target color to obtain a target color connected region. The invention further provides a document image processing system based on the HSV color space, and the document image processing system based on the HSV color space has the advantages that information such as handwriting in the image is automatically recognized through the system, preparation is made for subsequent operation such as information recognition, recording and statistics, image processing based on the HSV color space is adopted, color filtering is carried out on the color image, interference information is removed, and manpower and time are greatly saved.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to a document image processing method and system based on HSV color space. Background technique [0002] In recent years, image acquisition devices such as scanners, fax machines, and copiers have been widely used to acquire images of original documents such as books, bills, office documents, educational examination papers, and contracts. [0003] But now, the requirement for scanners is not only to capture images, but also to extract key information such as seals, handwriting, and machine-readable card options from the images to prepare for subsequent operations such as identification, recording, and statistics. [0004] For example, a Chinese patent with the patent number CN202110402489.5 discloses a watermark removal method, device and storage medium. The watermark removal method includes: for the image to be processed with a watermark, obtaining the position of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/90G06K9/46G06K9/34
CPCG06T7/90G06T2207/10024G06T2207/30176
Inventor 刘丁维罗颖杨海萍
Owner 宁波华高信息科技有限公司