[Tutor] Reading a "Raw "Image File
Emile van Sebille
emile at fenx.com
Sun Apr 12 22:46:12 CEST 2009
Wayne Watson wrote:
> I can read a raw of 640x480 bytes with:
> It likely contains a lot of 0 values, black=0. The result above is a
> string of 242 characters. I'm guessing the 0's were ignored, and only >0
> values were kept. If so, how do I get all 307200 bytes into a read?
> Whoops ... Ah, I missed 'rb'; however, I want to continue.
> I found the minimum value among the first 242 items to be 31 without the
the first 32 characters in ascii are control characters
> Among the 307200, I found it to be 150, which I believe is
> correct. That is, there are pixels in the image that are pretty bright.
> So what weirdness took place w/o the 'rb'? Why no 150?
not sure what this means...
> One more question, when I tried (no 'wb')
assuming you mean 'rb' above
> why di read
> balk at size, syntactically.
read terminates upon first end on line character encountered
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