Download Shareware and Freeware Software for Windows, Linux, Macintosh, PDA

line Home  |  About Us  |  Link To Us  |  FAQ  |  Contact

Serving Software Downloads in 976 Categories, Downloaded 29.870.800 Times

Fast edges of a color image (actual color, not converting to grayscale) 1.0

  Date Added: May 19, 2013  |  Visits: 228

Fast edges of a color image (actual color, not converting to grayscale)

Report Broken Link
Printer Friendly Version


Product Homepage
Download (18 downloads)



Extracts the edges of a color image without converting it to grayscale.Changes in color are detected even when the grayscale color of two pixels are the same. The edge strength is typically greater or equal to the magnitude obtained by simply filtering a grayscale image.Optionally, the edge orientation can also be returned.Example:The image generated by the example code (presented here as the screenshot) shows two edge types: White - edges found by both methods. Red - edges found only by the color method.This clearly shows that a significant amount of information is lost by the standard method, but it is recovered with the gradient method.figure, im = imread('peppers.png'); imshow(im)%get color edges and normalize magnitudeC = coloredges(im);C = C / max(C(:));%get grayscale edges and normalize magnitudeG_image = single(rgb2gray(im)) / 255;G = sqrt(imfilter(G_image, fspecial('sobel')').^2 + imfilter(G_image, fspecial('sobel')).^2);G = G / max(G(:));%show comparisonfigure, imshow(uint8(255 * cat(3, C, G, G)))Algorithm:The RGB color of each pixel is treated as a 3D vector, and the strength of the edge is the magnitude of the maximum gradient. This also works if the image is in any other (3-dimensional) color space. Direct formulas for the jacobian eigenvalues were used, so this function is vectorized and yields good results without sacrificing performance.

Requirements: No special requirements
Platforms: Matlab
Keyword: Algorithm Coloredgesim Comparison Fspecialsobel Gradient Image Imfilterg Image Imshowuint Singlergb Grayim Sqrtimfilterg Image
Users rating: 0/10

License: Shareware Size: 10 KB
USER REVIEWS
More Reviews or Write Review


FAST EDGES OF A COLOR IMAGE (ACTUAL COLOR, NOT CONVERTING TO GRAYSCALE) RELATED
Backup Utilities  -  R-Drive Image 4.7
R-Drive Image copies disks and creates disk image files for backup or duplication purposes. Disk image file contains exact, byte-by-byte copy of a hard drive, partition or logical disk and can be created with various compression levels on the fly...
11.13 MB  
3D Graphic Tools  -  Thin Image Upload 2.0 Beta
Thin Image Upload is a drag and drop image uploader for embedding in Web pages. Thin Image Upload has the ability to resize images on the client side. Files that are not images can be filtered out to save bandwidth. The applet is equipped with a...
70.66 KB  
Libraries  -  GD::Image::CopyIFS 0.25
GD::Image::CopyIFS is a Perl module for fractal-based image copying and resizing. SYNOPSIS # zoom in on an area of an image use GD::Image::CopyIFS; my $width = 64; my $height = 60; my $scale = 4; my $neww = $scale * $width; my $newh =...
21.5 KB  
Graphics Editors  -  Image-ma-jig 2.0.0
Image-ma-jig is a comprehensive batch image-editing package. Whether you own a digital camera, or work with digital images on your computer. Image-ma-jig gives you the tools you need to easily manage, manipulate and organize all of your image...
6.59 MB  
Word Processing  -  Image to PDF 3.0
Image to PDF is ideal software designed to convert multiple standard image formats including DWG, DXF, DWF, SHW, CDR, PSD, ICO, JPEG, JPG, JP2, CMW, J2K, JFT, SHP, IMG, IFF, PCD, PSP, PBM, EPS, TGA, WBMP, BMP, TIFF, PNG, GIF etc 87 image format...
13.68 MB  
Backup Utilities  -  !R-Drive Image Hard Disk Backup Software 3.0
Drive image and backup software that creates exact image of a hard drive, partition or logical disk. Drive image files can be created on the fly without stopping Windows and then can be stored in a variety of places, including removable media.
11.13 MB  
Multimedia & Graphics  -  Image Video Machine 3.0
Image Video Machine is an very easy to use image-to-video and video-to-image converting software. You can use this nice tool to create your own video files from separate image files, like making animated GIF. You can also extract all frames of a...
6.86 MB  
ActiveX Components  -  GdPicture Pro Image Processing ActiveX 3.9.0
GdPicture Pro OCX is an image activex ocx control to create, edit, and compose bitmap images. It can read, convert, print and write images in a large variety of formats. GdPicture Pro OCX can be used from any Windows development environment...
6.07 MB  
ActiveX Components  -  Image ActiveX OCX - Image Viewer CP Pro 2.58
Convert PSD, BMP, GIF, JPG, PNG, ICO, TIF image files to true color PDF file. Convert multipage TIF to multipage true color PDF. Support Lightness, Brightness, Contrast, Diffuse, Emboss, FocalBW, Gamma, InvertColor, Monochrome,...
5.94 MB  
ActiveX Components  -  Image ActiveX - Image Viewer CP Pro 3.0
Convert PSD, BMP, GIF, JPG, PNG, ICO, TIF image files to true color PDF file. Convert multipage TIF to multipage true color PDF. Support Lightness, Brightness, Contrast, Diffuse, Emboss, FocalBW, Gamma, InvertColor, Monochrome, Noise,...
5.94 MB  
NEW DOWNLOADS IN SCRIPTS, DEVELOPMENT TOOLS
Scripts  -  Freelancer Script 5.05
Main Features: 100% Secured. Email Support (3 Years). FREE Updates (3 Years). Post projects. Featured projects. Private projects. Sealed projects. Edit/delete projects. Select freelancers....
5.49 MB  
Scripts  -  B2B Script 4.20
Main Features: 100% Secured. Email Support (3 Years). FREE Updates (3 Years). Sign-up Account (Registration of account). Lead generation tools (for the sellers). Email verification to...
5.49 MB  
Scripts  -  B2C Script 5.06
Main Features: 100% Secured. Email Support (3 Years). FREE Updates (3 Years). The script comes with totally editable site colors, icons and graphics Multilevel categories allows extensive browsing Admin can change Category ordering or...
5.49 MB  
Scripts  -  Social Networking Script 2.86
Main Features: 100% Secured. Email Support (3 Years). FREE Updates (3 Years). Registration with name, email, password, date of birth etc. User can add multiple school, college, university with start...
5.49 MB  
Scripts  -  Business Networking Script 8.04
Main Features: 100% Secured. Email Support (3 Years). FREE Updates (3 Years). Ajax based interface. Profile creation. Different types of profile. Profile for jobseekers, employers and employed...
5.49 MB  
Development Tools  -  VMP Viewer 1.0
This is a very rudimentary tool to visualize the VMP files generated by BrainVoyager. Useful to share files with people who do not have BV.
10 KB  
Development Tools  -  Sending reports and timestamped file by emailing 1.0
main executing reference usage:[1] usage_send_mail.mIllustrates email sending with multiple separate files or single timestamped tar file. Attachment failure is properly handled, with continuation of report emailing without the attachment.[2]...
768 KB  
Development Tools  -  IrisMVC 2.0 rc1
IrisMVC is an OOP PHP framework that developers can use as a strong and secure foundation to build on various web applications following the Model-View-Controller (MVC) pattern. It provides the basic functionality developers need, without...
51.2 KB  
Development Tools  -  7-Zip for Script 4.42
7-Zip is a file archiver with a high compression ratio.Features:- High compression ratio in new 7z format with LZMA compression- Supported formats:- Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR- Unpacking only: RAR, CAB, ISO, ARJ, LZH, CHM,...
624.64 KB  
Development Tools  -  Barnardextest 1.0
This file, as the Fisher's exact test, performs the exact probability test for a table of frequency data cross-classified according to two categorical variables, each of which has two levels or subcategories (2x2). It is a non-parametric...
10 KB