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Method and device for enhancing image definition based on zoom factor

A technology of image clarity and scaling factor, applied in image enhancement, image communication, image data processing and other directions, can solve problems such as image scaling that cannot be effectively handled, and achieve the effect of improving clarity, solving image blur, and simple processing methods.

Inactive Publication Date: 2009-12-09
POWERLAYER MICROSYST HLDG
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Problems solved by technology

[0004] In order to solve the problem that the existing image sharpness enhancement technology cannot effectively handle image scaling, the present invention provides an image sharpness enhancement method based on scaling factors, which can effectively enhance the sharpness of the image when the input image is scaled

Method used

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  • Method and device for enhancing image definition based on zoom factor
  • Method and device for enhancing image definition based on zoom factor
  • Method and device for enhancing image definition based on zoom factor

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Embodiment Construction

[0034] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0035] figure 1 The illustrated embodiment discloses the flow of the image definition enhancement method based on the scaling factor, and the steps in the figure are described below.

[0036] 1. Image input and filtering to be processed

[0037] After the image signal to be processed is input, it is filtered, and the frequency component of the attribute value of the pixel to be processed is obtained by filtering. Specifically, the attribute value can be a pixel attribute such as luminance or chroma. The filtering in this embodiment adopts low-pass filtering to obtain high-frequency components and low-frequency components of luminance or chrominance. The low-frequency components are used as the object of subsequent transient enhancement processing. The frequency component is combined with the result of transient enhancement processing (that i...

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Abstract

The invention provides a method and a device for enhancing image definition based on zoom factor, aiming to solve the problem that the existing image definition enhancement technology can not effectively treat image zoom. The invention can effectively enhance the image definition when input images are zoomed. The method for enhancing the image definition based on zoom factor comprises the following steps: obtaining the frequency component of the attribute value of pixel to be treated through filtering which adopts low-pass filtering or band-pass filtering; carrying out transient enhanced treatment on the frequency component obtained from the step; and merging the frequency component after the transient enhanced treatment and other separated frequency components so as to realize image definition enhancement. The method adjusts the image definition enhancement according to the image zoom factor, thereby solving the problem of the prior art, and effectively treating image definition enhancement when the images are zoomed.

Description

technical field [0001] The invention belongs to the technology of digital image processing, especially the technology of enhancing image clarity. Background technique [0002] The principle of the image sharpness enhancement method is to enhance the high-frequency components of the image to achieve the effect of enhancing details or edges. There are two traditional methods, one is unsharp masking, that is, the image signal passes through a set of high-pass filters After obtaining the high-frequency component, multiply it by the gain factor, and then add it to the separated low-frequency component. This method mainly enhances the amplitude of the high-frequency component. Another method is transient enhancement, including transient enhancement of brightness and transient enhancement of chroma. The purpose is to make the slowly changing edge in the image become a steeper changing edge, so that the edge feels sharp visually. A method to increase the high frequency of the image...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/208G06T5/00G06T3/40
Inventor 邓宇董旭柳崎峰
Owner POWERLAYER MICROSYST HLDG
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