64 is multiplied with a signal sample value. after multiplication the sample value changes 0 or 255
eg=>17x64= 1088 the resultant value of the above process is 255 i cant understand what actually happened.kindly help me in this
I suppose that you multiplied values in MATLAB. I think that your signal samples are the numbers of 'uint8' type. In order to multiply signal samples properly you have to convert them on 'double' type. I checked your example in MATLAB Command Window. The listing is below:
>> a=uint8(17)
a=
17
>> 64*a
ans =
255
>> 64*double(a)
ans=
1088
I hope that this is solution of your problem.
best regards
Robert Wielgat
Hello,
It's a basic situation.
If your resulting image is a 8-bit image it can only contains values from 0 to 255 (2^8 values different possible values).
You have to change your beginning image type from 8-bit to 16 or 32 bit before the multiplication.
16 bit - 0 to 65 535 => 2^16 different values
32 bit allows fractional values.
You should read ImageJ user guide before analyzing images.
https://imagej.nih.gov/ij/docs/guide/146.html
Regards,
Arthur
Yes, this problem confused me a lot in Matlab, usually, double() solves the problem.
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