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

Apparatus and method for increasing contrast ratio using histogram match

A technology for enhancing device and contrast is applied in the field of contrast device, which can solve the problems of unreliable edge and difficult device, and achieve the effect of easy contrast enhancing device

Inactive Publication Date: 2006-07-05
SAMSUNG ELECTRONICS CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to overcome the above disadvantages, complex algorithms have been proposed, but it is difficult to implement such a device
[0011] At the same time, 6 with conventional contrast stretching techniques, if there are bright or dark parts in the image, the stretched edges become unreliable, making it difficult to expect a good result

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
  • Apparatus and method for increasing contrast ratio using histogram match
  • Apparatus and method for increasing contrast ratio using histogram match
  • Apparatus and method for increasing contrast ratio using histogram match

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0059] Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like parts throughout. For the purpose of illustrating the present invention, the present invention will be described with reference to the accompanying drawings.

[0060] Example.

[0061] figure 2 is a block diagram of a contrast enhancement apparatus 200 according to an aspect of the present invention.

[0062] see figure 2 , the contrast enhancement device 200 includes a first operation part 210 , a second operation part 220 , a transformation part 230 , and a transformation range specifying part 240 .

[0063] The first operation section 210 calculates the average value and standard deviation of the input image. The second operation section 220 calculates the average value and standard deviation of the target image from the average value and standard deviation of the input image....

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

An apparatus and method to enhance a contrast includes a first operation part, a second operation part, and a mapping part. The first operation part calculates an average and a standard deviation of an input image. The second operation part calculates an average and a standard deviation of a target image based on the average and the standard deviation of the input image. The mapping part converts a pixel value of the input image by a mapping function generated by receiving the averages and the standard deviations of the input image and the target image from the first operation part and the second operation part, respectively, and outputs a pixel value of an output image.

Description

[0001] This application claims priority from Korean Patent Application No. 2002-6832 filed with the Korean Intellectual Property Office on February 6, 2002, which is incorporated herein by reference. technical field [0002] The present invention relates to a device and method for enhancing contrast using histogram matching, in particular to a device and method for enhancing the contrast of an output image using a transformation table written according to the distribution of an input image and a target image. Background technique [0003] A histogram is used to represent the distribution of pixel contrast values ​​in an image. In other words, the histogram describes the distribution and value of the bright and dark spots present in the image. The smoothing of the histogram can make the distribution of contrast values ​​of a biased or non-uniform image uniform, thus enhancing the image. By smoothing the histogram, dark images are brightened and too bright images are slightly...

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 Patents(China)
IPC IPC(8): H04N1/407G06T5/40G06T5/00G06K9/00G09G3/20H04N5/20
CPCG06T2207/20216G06T5/50G06T5/40G06T5/009G06T5/92
Inventor 吴才焕梁承埈
Owner SAMSUNG ELECTRONICS CO LTD
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