I have to spread rice grains on a sheet and then find the average length of the rice grains spread. Any ideas how to do this in MATLAB?
A:
sounds like homework but here are some ideas
look at regionprops in the image processing toolbox.
there are a bunch of properties it can help you find, 'majoraxislength' may be apropriate.
second
2010-09-02 12:43:00
A:
If you have a good contrast between the background and the rice, you can follow a simple (though naive algorithm) recipe (I don't remember the commands in Matlab but it will be easy using the help)
1 - Threshold
2- Component Labeling
3- Get the length of each component (as pointed by @second) and use it to reckon the average size.
Andres
2010-09-02 12:46:34
what if the grains are touching each other and they are not aligned in a straight manner.?
shanu
2010-09-05 10:38:50
rice grains can be touching each other in any manner.......wats ur comment on that..
shanu
2010-09-05 10:39:50
+1
A:
This exact situation can be found as an image processing example in the online MathWorks documentation for the Image Processing Toolbox:
Seriously, they use a picture of rice grains and everything! The only difference would be that you would want to look at a different property of the image when using the function REGIONPROPS, probably the 'MajorAxisLength' property (which requires using the labeled matrix from the example).
gnovice
2010-09-02 16:13:32