Image enhancing method and device

An image enhancement and image technology, applied in the field of image processing, can solve problems such as image distortion and image over-enhancement

Active Publication Date: 2015-04-08
XIAOMI INC
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Problems solved by technology

[0004] In order to solve the problem of image distortion caused by excessive enhancement of processed images in the related art, the present disclosure provides an image enhancement method and device

Method used

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  • Image enhancing method and device

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Embodiment Construction

[0064] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.

[0065] figure 1 is a flowchart of an image enhancement method shown according to an exemplary embodiment, such as figure 1 As shown, the image enhancement method can be applied to electronic devices, such as smart phones, tablet computers, smart TVs, e-book readers, multimedia players, laptop computers and desktop computers, etc. The image enhancement method may include the following...

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Abstract

The disclosure discloses an image enhancing method and device, and belongs to the technical field of image processing. The image enhancing method comprises the following steps: acquiring the original gray-scale value of each pixel point in an image, and calculating the gamma transform mapping function of the image according to the original gray-scale values; and / or calculating a histogram equalization mapping function according to the original gray-scale values; calculating a transform mapping function according to at least one of the gamma transform mapping function and the histogram equalization mapping function and a just noticeable difference (JND) model; and performing transformation on the original gray-scale value of each pixel point in the image according to the transform mapping function to obtain an enhanced image. At least one mapping function in the gamma transform mapping function and the histogram equalization mapping function is modulated through the JND model, and gray-scale value transformation is performed on the image according to the modulated transform mapping function, so that the problem of image distortion due to excessive enhancement of the processed image is solved, and the effect of improving the image enhancing effect is achieved.

Description

technical field [0001] The present disclosure relates to the technical field of image processing, in particular to an image enhancement method and device. Background technique [0002] Usually, in order to obtain a better visual experience, it is necessary to use an image enhancement method to modify the appearance of the image on the display or other physical supports. In the image enhancement method provided in the related art, the histogram of the image is counted, and the cumulative histogram is calculated according to the principle of histogram equalization, and the cumulative histogram is used as a mapping function, and the pixel points in the image are transformed according to the mapping function. Grayscale, which makes the areas with dense grayscale distribution in the image sparse, and the sparse areas become dense, so as to achieve the effect of enhancing the contrast of the image. [0003] During the process of implementing the present disclosure, the inventors ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T5/40
Inventor 王百超秦秋平陈志军
Owner XIAOMI INC
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