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File:Equalized Histogram.svg

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Original file (SVG file, nominally 712 × 470 pixels, file size: 61 KB)

Summary

Description Greyscale frequency histogram of Equalized Hawkes Bay NZ.jpg. X-axis shows image intensity, y-axis number of pixels with that intensity. Black curve shows cumulative histogram.
Date
Source self-made based on Image:Equalized Histogram.gif file by Konstable
Author Jarekt
SVG development
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The SVG code is valid.
 
This diagram was created with MATLAB.
Source code
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MATLAB code

I = rgb2gray(imread('Unequalized_Hawkes_Bay_NZ.jpg'));
h = hist(double(I(:)),0:255);
map = cumsum(h)/prod(size(I));
J = 255*map(I+1);
[h x]=hist(double(J(:)),0:255);
map = cumsum(h)/prod(size(J));
figure(1)
hold on
bar(x, h, 'r');
plot(x, 30000*map, 'k')
xlim([0 256]);
ylim([0 31000]);
plot2svg('Equalized Histogram.svg')

Licensing

Public domain I, the copyright holder of this work, release this work into the public domain. This applies worldwide.
In some countries this may not be legally possible; if so:
I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

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April 2008

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Date/TimeThumbnailDimensionsUserComment
current15:57, 4 April 2008Thumbnail for version as of 15:57, 4 April 2008712 × 470 (61 KB)Jarekt== Summary == {{Information |Description=Greyscale frequency histogram of Equalized Hawkes Bay NZ.jpg. X-axis shows image intensity, y-axis number of pixels with that intensity. Black curve shows cumulative histogram

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