Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Image enhancing method based on frequency domain

An image enhancement and frequency domain technology, applied in the field of image enhancement based on frequency domain, can solve problems such as utility difficulties, and achieve the effect of low computational complexity, easy parallel processing, and intuitive deformation super-resolution mechanism.

Inactive Publication Date: 2015-12-09
CHENGDU RONGCHUANG ZHIGU SCI & TECH
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practice, finding an effective method requires extensive experimentation, and it is difficult to predict the utility of a specific method without prior knowledge of how a given image will be degraded.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Image enhancing method based on frequency domain
  • Image enhancing method based on frequency domain
  • Image enhancing method based on frequency domain

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0042] A method for image enhancement based on frequency domain, comprising the steps of:

[0043] (1) Get the original image;

[0044] (2) Utilize the Fourier transform method to convert the image in the original image space to the frequency domain space; utilize the Fourier transform method to convert the image in the original image space to the frequency domain space. The specific steps are as follows:

[0045] (21) read the image;

[0046] (22) convert the image matrix format read;

[0047] (23) Transform the format-converted image matrix into the frequency domain with Boyier transform, that is, move the zero point to the center; the filtering in the frequency domain includes the following steps: ① Multiply the input image by (‐1)x+y to get Carry out center transformation; ②Calculate the DFT of the image after the centralization in step ①, that is,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an image enhancing method based on frequency domain and belongs to the technical field of image enhancement methods. An image is regarded as a two-dimensional signal. Signal enhancement based on two-dimension Fourier transform is performed on the two-dimensional signal. By adopting the lowpass filtering method, i.e., just allowing low-frequency signals to pass, noise in pictures can be removed. By adopting the highpass filtering method, high frequency signals on edges can be increased, and vague pictures can become clear. The method comprises steps of 1) obtaining an original image; 2) switching images in the space of the original image to frequency domain space by means of the Fourier transformation; 3) using transition function to process images in the frequency domain space; and 4) after images in the frequency domain space is processed via the transition function, enhancing obtained images via inverse transformation. The image enhancing method is used for image processing.

Description

technical field [0001] An image enhancement method based on frequency domain is used for image processing and belongs to the technical field of image enhancement methods. Background technique [0002] Image enhancement refers to highlighting important information in an image according to specific needs, while weakening or removing unnecessary information. Images obtained from different channels, through appropriate enhancement processing, can process the original blurred or even indistinguishable original image into a clear and usable image rich in a lot of useful information, effectively remove the noise in the image, enhance Edges or other regions of interest in the image, making it easier to detect and measure objects of interest in the image. [0003] An early application of image enhancement was various processing of images sent back by spacecraft. In the 1970s, the application of image processing technology rapidly expanded from the aerospace field to various fields ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T3/00
Inventor 张岱齐弘文
Owner CHENGDU RONGCHUANG ZHIGU SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com