Name

improfile — Draws intensity profiles of an image

Calling Sequence

[hprofile,vprofile]=improfile(matrix[,option,maximal_luminance])

Parameters

matrix
The gray-level matrix obtained by matrix=imread("my_picture.jpg").
option
0 to draw the profiles on the image 1 to draw the profiles in separated windows. 2 to draw the profiles on the image and the gaussian interpolation (used with laser beam images) Default=0.
maximal_luminance
hprofile and vprofile will contain values in the 0-1 range. To draw the profile, you can specify a multiplication factor to these values. For example, if your initial image was 8bits, you could pass 255 as the maximal luminanace of the image. Default= 255.
hprofile, vprofile
Matrix containing the horizontal (or vertical) profile selected.

Description

Draws the values of pixels on a line and/or a row. Can draw profiles on the image or in separate windows. With the option=2, you can determine radius w of a laser beam, which allows you to find the beam waist.

This function was created (and tested) only with gray level images.

Examples

   a=imread(SIPDIR+'images/tru.jpg');
   g=im2gray(a);
   improfile(g);

   //profiles in separate windows
   improfile(g,1)

   //laser beam visualisation
   b=gray_imread(SIPDIR+'images/photonics/laser1.jpg');
   improfile(b,2);

Authors

Jocelyn DRUEL <jocelyn.druel1@libertysurf.fr>
Ricardo Fabbri <ricardofabbri@users.sf.net>

Availability

The latest version of the Scilab Image Processing toolbox can be found at

http://siptoolbox.sourceforge.net

See Also

xgetpixel