8/26/2014Matlab code: Histogram equalization without using histeq function | IMAGE PROCESSING IMAGE PROCESSING Follow + 176 Image Processing Like 2,474 people like Image Processing. Facebook social plugin Its Totally Random MATLAB CODE: GIm=imread('tire.tif'); numofpixels=size(GIm,1)*size(GIm,2); figure,imshow(GIm); Subscribe Now: Subscribe in a reader YOU ARE HERE title('Original Image'); HIm=uint8(zeros(size(GIm,1),size(GIm,2))); freq=zeros(256,1); probf=zeros(256,1); probc=zeros(256,1); cum=zeros(256,1); output=zeros(256,1); http://angeljohnsy.blogspot.com/2011/04/matlab-code-histogram-equalization.html 2/8 Centroid. Spain viewed Image Sharpening using second order A visitor from Kharagpur. output(i)=round(probc(i)*no_bins). freq(value+1)=freq(value+1)+1. Bangladesh viewed Sobel edge detection | IMAGE PROCESSING 4 mins ago A visitor from Evanston. probc(i)=cum(i)/numofpixels. end end figure. TAGS title('Histogram equalization').1) for j=1:size(GIm. 10 A visitor| IMAGE from India viewed mins ago TILE SWAPPING GAME | IMAGE PROCESSING 27 A visitor from Thanjavur. %The probability of each occurrence is calculated by probf..com/2011/04/matlab-code-histogram-equalization..html 3/8 .imshow(HIm).j)=output(GIm(i. ago A visitor10from Pakistan viewed FACE DETECTION . United States viewed MATLAB CODE:Local Histogram equalization.MATLAB CODE PRO.1) for j=1:size(GIm. no_bins=255. mins ago Malaysia viewed Sobel edge detection | IMAGE PROCESSING 40 mins ago A visitor from Barcelona.8/26/2014 Matlab code: Histogram equalization without using histeq function | IMAGE PROCESSING Live Traffic Feed %freq counts the occurrence of each pixel value.j). %The cumulative distribution probability is calculated. probf(value+1)=freq(value+1)/numofpixels.blogspot.. Malaysia viewed Find Area. India mins ago viewed Bit-Plane Slicing | IMAGE PROCESSING 35 A visitor from Petaling Jaya. end for i=1:size(GIm. deri. minsIslamabad..2) A visitor from Chittagong. end end sum=0. 5 mins ago viewed Sobel Switzerland edge detection | IMAGE PROCESSING 6 mins ago A visitor from Ipoh.. 9 mins A visitor from Dayton. 44 mins ago India viewed Sobel edge detection | IMAGE A visitor from Salai. GUI Components in MATLAB Removing Image noise Image Conversion Photoshop effects in MATLAB Edge detection MATLAB BUILT_IN FUNCTIONS Morphological Image Processing Array functions in MATLAB Video Processing Object Identification Optical illusion Shapes Templates Files Histogram equalization Image Compression Image Arithmetic Image Geometry Followers %The result is shown in the form of a table http://angeljohnsy.. for i=1:size(probf) sum=sum+freq(i). India PROCESSING 47 mins ago viewed MATLAB Real-time view · Menu HIm(i. A visitor from Lugano. Perimeter. for i=1:size(GIm... Equivdia... United ago States viewed Image Erosion without using MATLAB funct. cum(i)=sum.j)+1).2) value=GIm(i. title('Before Histogram equalization'). bar(HIm).2..[]). columnformat = {'numeric'. 'Cumulative histogram'. 'numeric'. 'numeric'.8/26/2014 Matlab code: Histogram equalization without using histeq function | IMAGE PROCESSING figure('Position'.9]. Members (50) More » for i=1:256 dat(i.html 4/8 .get(0.'screensize')).cum(i)..'numeric'}. 'Histogram'. title('After Histogram equalization'). Already a member? Sign in columneditable = [false false false false false false]. subplot(2.html Here is a simple Version of Histogram Equalization MATLAB CODE: http://angeljohnsy. 'RowName'. 'ColumnEditable'.1 0.. bar(GIm). 'Data'.. 'numeric'. 'Probability'.1 0. dat.probf(i).'normalized'. subplot(2.2).com/2011/04/matlab-code-histogram-equalization. Join this site w ith Google Friend Connect dat=cell(256.com/2011/06/local-histogram-equalization. 'ColumnFormat'.. [0... columnformat.. columneditable.4 0. t = uitable('Units'..2.blogspot.'Output'}. 'numeric'.com/2011/06/histogram-of-image.probc(i).'CDF'.freq(i).6).blogspot..html Local histogram equalization of an Image: http://angeljohnsy..4).output(i)}. columnname.. To find the histogram of an Image: http://angeljohnsy.blogspot..:)={i... end columnname = {'Bin'. 'ColumnName'.'Position'. []. 2011 at 7:53 PM sầu_đông said.the code works!!unlike most of the other sites! -thank u soo much for this code.imshow(A).and most importantly... help me out Thanx in advance... September 26.. %Calculate the Cumlative sum CSum=cumsum(Output). its last part is not working 3rd fig does not plot. %Find the histogram of the image. Like "IMAGE PROCESSING" page Labels: Histogram equalization Your Reactions: Useful (5) Interesting (0) Not bad (0) :-( (0) 21 comments: Anonymous said. its nice that this space provides output too.1).ERROR::::bar must be 2 -D. December 14.. %Specify the bin range[0 255] bin=255.html 5/8 . good.8/26/2014 Matlab code: Histogram equalization without using histeq function | IMAGE PROCESSING %Read a grayscale Image or a matrix mxn A=imread('tire.. %Perform the transformation S=T(R) where S and R in the range [ 0 1] HIm=CSum(A+1)..com/2011/04/matlab-code-histogram-equalization. %Convert the image into uint8 HIm=uint8(HIm*bin).. Val=double(Val). figure. http://angeljohnsy.0:bin).blogspot. figure. 2011 at 9:10 PM cool_images said. 2011 at 11:50 PM raj kumar said. %Divide the result by number of pixels Output=I/numel(A)..imshow(HIm). very good December 12. I=hist(Val.tif')... Val=reshape(A. 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