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Digital image automatic speckle-removing method

A digital image and speckle technology, which is applied in image enhancement, image data processing, instruments, etc., can solve the problems of inconvenient and fast, and many steps of freckle removal.

Active Publication Date: 2013-12-11
MEITU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although many of the current image processing software can meet most of the needs of users and have this kind of freckle removal function, the existing freckle removal operation still has many steps, which is not convenient and fast enough.

Method used

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  • Digital image automatic speckle-removing method
  • Digital image automatic speckle-removing method
  • Digital image automatic speckle-removing method

Examples

Experimental program
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Embodiment Construction

[0068] A kind of method of digital image automatic spot removal in the present embodiment, it comprises the following steps:

[0069] 1) Receive a face image A digital image A, carry out grayscale processing to image A, obtain grayscale image B; This processing adopts one of following two formulas:

[0070] Gray=0.299*Red+0.587*Green+0.114*Blue:

[0071] Gray=(Red*306+Green*601+Blue*117+512) / 1024;

[0072] Wherein, Gray is the gray value of each pixel of the grayscale image B, and Red, Green, and Blue are the color values ​​of the red, green, and blue channels of each pixel of the image A respectively;

[0073] 2) Perform contrast enhancement processing on the grayscale image B, the formula is:

[0074] nResult=nColor+(nColor-128)*(1.0+Contrast) / 255

[0075] Among them, nResult represents the gray value after contrast enhancement, nColor represents the gray value to be contrast enhanced, and Contrast represents the intensity of contrast enhancement, which is 0.15;

[0076]...

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Abstract

The invention discloses a digital image automatic speckle-removing method. The method is characterized in that: obtaining a result D by successively performing graying, contrast enhancing, gradient maximum searching, skin eliminating, isolation point eliminating, Gauss blurring, threshold processing and region list summation on an image A; and finally performing Poisson equation processing on the speckles in the image A according to the result D and the result of the gradient maximum searching so as to achieve the final effects of automatic acne removing and speckle removing. According to the technical scheme, the hand-operated actions in digital image speckle-removing operation are completely eliminated, the whole process can be automatically finished, no hand-operated speckle calibration and selection are needed, and the operation time and procedures are saved.

Description

technical field [0001] The invention relates to a digital image processing method, in particular to an image processing method for automatically removing spots in the digital image. Background technique [0002] With the popularization of digital portable devices, a large number of digital camera devices are also used in various devices including mobile phones and tablet computers, which greatly reduces the threshold for users to take photos, and various life-related shooting can be completed through simple operations. , which is very convenient. In particular, taking selfies of individuals has become a common behavior in our daily life, and has even been used as a technical means of socializing. This type of shooting for portraits, especially for facial makeup, usually requires adjustment and beautification of the image after taking a selfie. One of the more common operations of this type is to remove some unwanted elements in the image (such as acne, spots, moles, etc.)....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
Inventor 张伟傅松林李志阳张长定
Owner MEITU
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