Racket libraries can read and write images of various formats and pixels depths, but a `bitmap%` object always represents an image using 1 or 32 bits per pixel in memory.
At Mon, 29 Sep 2014 23:14:43 +0800, rrandom wrote: > Hi,I am recently working in the book Digital Image Processing with > racket. I want to know is there any way to get the bit depth or color > depth of a input bitmap in Racket? I found the get-depth method in > racket/draw,bitmap%, but it only return 1 and 32, that's not what i > really want.I input a bitmap whose bit depth is 8 but i got 32. > following is the code: > > > (send (read-bitmap "Fig0305(a)(DFT_no_log).tif") > get-depth) > 32 > > Is there anything I am wrong? Thank you! > ____________________ > Racket Users list: > http://lists.racket-lang.org/users ____________________ Racket Users list: http://lists.racket-lang.org/users
