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  • Last update: 5 years ago
  • Total downloads: 92
  • Operating system: Linux, Mac OS X, Win All, BSD, Solaris
  • Publisher: Bernd H
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scripts default iconextract integrated intensity profiles from image (Scripts) Publisher's description

improfile_integrated' computes intensity values along a line or multiline in a greyscale images

function [CX,CY,C_sum,C,xi,yi]=improfile_integrated(I,d,xi,yi);

'improfile_integrated' computes intensity values along a line or multiline in a greyscale images. Parameter d gives the opportunity to integrate along thicker lines with width d.

Please note the 'known problems' section!

I : image (only grayscale)
d : thickness of line for integration
xi, yi : x-/y- coordinates of line profile

CX, CY : (center) coordinates of intensity values
C : intensity along path, single line scan (from improfile)
C_sum : integrated intensity profile of line with thickness d


figure, imshow(I,[]);
% image with step in the middle, the oise free image

figure, imshow(I,[]);
% image is noisy but step is clearly visible

% do a ten pixel averaging
grid on, axis tight
xlabel('lateral distance [px]');
ylabel('intensity [a.u.]');
title('comparision of single linescan and integrated line scan');

known problems:

sometimes the routine fails because of the numerical method of finding
the rotated data points. An error is printed. The try it again with a
slightly different line scan.


is still not reliable, but up to my knowledge the first routine wich
extracts integrated intensity profiles under Matlab. This is a standard
tool in image analysis.

Feel free to improve it!

Hei 06/06

System Requirements:

MATLAB 7.1.0 (R14SP3)
Program Release Status: New Release
Program Install Support: Install and Uninstall

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