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A method of image subjective visual effect enhancement based on Laplacian pyramid

A visual effect and pyramid technology, applied in the field of image processing, can solve problems such as over-enhancement, and achieve the effect of avoiding excessive image noise and avoiding image over-enhancement

Active Publication Date: 2020-10-23
北京锐影医疗技术有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for enhancing the subjective visual effect of an image based on the Laplacian pyramid, which can alleviate the boundary effects, over-enhancement and noise that may occur in the image enhanced by the traditional contrast-limited adaptive histogram equalization method Significantly improve the subjective visual effect of the image

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  • A method of image subjective visual effect enhancement based on Laplacian pyramid
  • A method of image subjective visual effect enhancement based on Laplacian pyramid
  • A method of image subjective visual effect enhancement based on Laplacian pyramid

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[0035] In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0036] A kind of image subjective visual effect enhancement method based on Laplacian pyramid according to the present invention, its flow chart is as follows figure 1 shown, including the following steps:

[0037] Step S1: Image Laplacian Pyramid Decomposition

[0038] Using existing technology to decompose the input image into a Laplacian pyramid to obtain an approximate image Lp K and the multi-scale detail image Lp k (k=1,2,...,K-1); then scale the multi-scale detail image to the approximate size of the image, and calculate the mean value of the scaled image to obtain the multi-scale detail mean image Among them, K is the number of layers of the Laplacian pyramid, Lp_resized k (k=1,2,...,K-1) is the scaled mult...

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Abstract

The invention relates to an image subjective visual effect enhancement method based on a Laplace pyramid, and belongs to the field of digital image processing. The method comprises the steps of 1, performing Laplace pyramid decomposition on an original image to obtain an approximate image and a multi-scale detail image; and 2, enhancing the approximate image based on an improved contrast limited adaptive histogram equalization algorithm; 3, enhancing the multi-scale detail image; and 4, performing Laplace inverse transformation on the enhanced approximate image and the multi-scale detail imageto obtain an enhanced image. Through the steps, the problems of boundary effect, over-enhancement, overlarge noise and the like possibly occurring in the image after traditional contrast-limited adaptive histogram equalization enhancement can be effectively relieved, and the subjective visual effect of the image is remarkably improved.

Description

technical field [0001] The invention provides a method for enhancing the subjective visual effect of an image based on a Laplacian pyramid, which belongs to the technical field of image processing. Background technique [0002] Image enhancement is an important processing step in image processing, which can effectively improve image quality and enhance the subjective visual effect of images. Among them, contrast-limited adaptive histogram equalization is one of the most commonly used local image enhancement algorithms. It first divides the image into multiple continuous non-overlapping image blocks, and then performs histogram correction and equalization respectively to obtain the corresponding gray degree mapping function, and finally perform bilinear interpolation to alleviate the discontinuous effect between different image blocks. This algorithm can effectively enhance the detail information of the local image and improve the subjective visual effect of the image, but i...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00G06T5/40
CPCG06T5/002G06T5/40G06T2207/20016G06T2207/20021G06T2207/20048
Inventor 黄立东黄黎明李志明陈海华
Owner 北京锐影医疗技术有限公司
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