I have a problem whichI hope somebody can help me
with. I have an image ranging in values from 0 to 255.
I have to modify some of the pixels to say 103.234
I therefore have values with decimal places. however
the problem is when I go and save image again using
imwrite() function I loose these decimal placed values
and am left with 103 rather than 103.234
I hope that somebody can help me with this.
Nil an tintean mar do thintean fein
The image values that you mentioned show that its a gray scale image with only 256 shades of gray. So a fractional value will be quantized to the nearest integer and you'll only be able to store integars from 0 to 255. In other words by 103.234 that you are trying to store, you are defining a shade of gray which is impossible to be represented by a gray scale. With a precision ranging to 3 decimal positions, you need some thing like 65536 levels of quantization !
Btw just for your info, human eye is only sensitive to 256 shades of gray so a further resolution cannot be processed by our brains.
Join the worlds largest e-mail service with MSN Hotmail. Click Here