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Expression
Posted Jul 6, 2012, 5:11 p.m. EDT Version 4.2a 2 Replies
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Hi,
I’m modeling a component from the importation of an image. As you know when you import an image, you obtained a function im1(x,y)=(R+G+B)/3 , so is easy to separate only two material. Using the following expression:
Material1*(im1(x,y)<=0.5)+Material2*( im1(x,y)>0.5)
But when i try to do an analytic function in order to distinguish 4 different materials in the image I’m not able to realize a good expression, because there are element that are between at range, but when I applied the following expression:
Material1*(im1(x,y)>=0.9)+Material2*( 0.7<=im1(x,y)<0.9)+Material3*(0.5<=im1(x,y)<0.7)+Material4(im1<0.5)
That doesn’t work and I can only supposed that the expression (0.5<=im1(x,y)<0.7) is incorrect or not supported by Comsol…So if somebody can help me or teach me at little more about the expression that you can input in Comsol I would be very grateful
I’m modeling a component from the importation of an image. As you know when you import an image, you obtained a function im1(x,y)=(R+G+B)/3 , so is easy to separate only two material. Using the following expression:
Material1*(im1(x,y)<=0.5)+Material2*( im1(x,y)>0.5)
But when i try to do an analytic function in order to distinguish 4 different materials in the image I’m not able to realize a good expression, because there are element that are between at range, but when I applied the following expression:
Material1*(im1(x,y)>=0.9)+Material2*( 0.7<=im1(x,y)<0.9)+Material3*(0.5<=im1(x,y)<0.7)+Material4(im1<0.5)
That doesn’t work and I can only supposed that the expression (0.5<=im1(x,y)<0.7) is incorrect or not supported by Comsol…So if somebody can help me or teach me at little more about the expression that you can input in Comsol I would be very grateful
2 Replies Last Post Jul 7, 2012, 3:46 p.m. EDT
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Posted:
1 decade ago
Either (0.5<=im1(x,y)&im1(x,y)<0.7) or (0.5<=im1(x,y)&&im1(x,y)<0.7) should work
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Posted:
1 decade ago
Thank a lot