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Thread Subject: feature extraction-classification

Subject: feature extraction-classification

From: Cem NAMAZCI

Date: 19 May, 2008 12:28:02

Message: 1 of 2

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Hi,

image is:

http://bildupload.sro.at/p/247812.html

there is a roboter arm, and when it wants to hold pepsi
bottle in this image, it should exactly now, which one is
pepsi bottle or blue/green bottle...

because of this, i should make a classification...

Do you have any idea, what can i do?
i have segmented images of the bottles also:

http://bildupload.sro.at/p/247813.html
http://bildupload.sro.at/p/247814.html
http://bildupload.sro.at/p/247815.html
http://bildupload.sro.at/p/247816.html

region of interest is defined in this picture:
http://bildupload.sro.at/p/247818.html

i think i can't do any classification with colours, because
they will change under different lighting condition, and it
will be hard to define a classification with colours.

what can be other features and how to work with them???

thaks for your answers...

Subject: feature extraction-classification

From: OkinawaDolphin

Date: 27 May, 2008 11:28:01

Message: 2 of 2

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There are color spaces where lightness is separated from
the kind of color. Examples are the L*a*b* and HSV spaces.
I suggest using the a* and b* components of L*a*b* for
color classification. The conversion works in the following
way:

Conversion = makecform('srgb2lab');

Lab = applycform(RGB, Conversion);

ColorComponents = Lab(:, :, 2 : 3);

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Tag Activity for This Thread
Tag	Applied By	Date/Time
feature	Cem NAMAZCI	19 May, 2008 08:30:06
extraction	Cem NAMAZCI	19 May, 2008 08:30:06
processing	Cem NAMAZCI	19 May, 2008 08:30:05
image	Cem NAMAZCI	19 May, 2008 08:30:05

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