Frame Difference

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Duke Watson
Duke Watson 2012-6-2
In the frame difference method,on converting an image to frame,i have got an error in the following statement:
M(i-1)=im2frame(unit8(fg),gray);
fg is gray image.
the error is :
Indexed movie data values must be legal color map indices:
1.0<=value<=length(colormap) for double-precision movie data,and
0<=value<=length(colormap)-1 for unit8 movie data.
plzz tell me how can i fix this error?

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采纳的回答

Walter Roberson
Walter Roberson 2012-6-2
The default size of the colormap for gray() is smaller than 256 elements. You need to use
M(i-1)=im2frame(uint8(fg),gray(256));
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Image Analyst
Image Analyst 2012-7-28
Why are you casting it to double? Don't do that. There's probably a zero in there and it says it must have values between 1 and 4096. Why did you want to cast to double anyway, when it was not necessary?
Hari Patel
Hari Patel 2012-7-30
编辑：Hari Patel 2012-7-30
I am casting it to DOUBLE because im2frame can only make movie frame from image matrices of type double or unit8 and i checked, its not zero.

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