thanks for the replies, everyone I think I am going to try do what i need to do using jpg instead of png for now.
The funny thing is this piece of code I am now trying to run used to work with those kind of gel png in the past when I have this installed in an old server: python-imaging-devel-1.1.6-3.fc7 On 2/5/12, Matthias Bock <matthiasb...@users.sourceforge.net> wrote: > It really is a PNG and it's 16-bit grayscale. > > $ file gcp.png > gcp.png: PNG image data, 1024 x 768, 16-bit grayscale, non-interlaced > > I can reproduce, the blank white show() output, > which clearly is a bug in PIL. > > PIL opens it in "I" mode > print im.mode > which means "integer", but I don't know whether this is correct > or not. Maybe "I;16" or so could be tried. > See http://svn.effbot.org/public/tags/pil-1.1.4/libImaging/Unpack.c > for possible modes. > > QuickFix: Make a JPG. > > ... > im = Image.open('gcp.jpg') > ... > > Have a nice day, > Matthias > > Am Samstag, den 04.02.2012, 10:58 -0500 schrieb Chris Mitchell: >> Hey Nelson, >> >> Are you sure this image isn't actually a tiff (Every gel scanner I've ever >> used outputs tiffs)? Also, is it opening as an 8 bit image or a 16 bit? >> For a gel scan, it should be a 16 bit image, so you can consider forcing >> the mode while opening it.. >> >> Chris >> >> On Tue, Jan 31, 2012 at 1:38 PM, Nelson Tong >> <tongsnelson....@gmail.com>wrote: >> >> > thanks for reply, Matthias, >> > >> > when I use "show()", the image appears to have an all-white >> > background, nothing else is on it. The size does indeed match the png >> > size , I used the following to confirm: >> > >> > x, y = outIm.size >> > print "size of outImg: " + str(x)+" " + str(y); >> > >> > I tries to resave the png as a png image with a different name using >> > PIL and show() of the 2nd png image still appear to have all-white >> > background with nothing on it. >> > >> > but If I open the images (both the 1st and the re-saved image ) with >> > the command line command of "display", I can see the images via >> > ImageMagick. >> > >> > Attached is example image which I am having problem with. Can you >> > reproduce the same problem I'm seeing with this image, possibly due to >> > the png image being broken? >> > >> > -N. >> > >> > >> > On 1/29/12, Matthias Bock <matthiasb...@users.sourceforge.net> wrote: >> > > Am Freitag, den 27.01.2012, 11:11 -0500 schrieb Nelson Tong: >> > > >> > >> outI = Image.open( fileOutPNGFile ) >> > >> outI.show(); >> > >> >> > >> The code run without error, but the image return via X-windows on my >> > >> linux machine is a blank image, without visible graphic on it. >> > > >> > > What color is this "blank": Grey? White? >> > > Does the size match the PNG size? >> > > >> > >> I am 100% positive that the image of fileOutPNGFile is not corrupted >> > >> because I am able to open it via the web-browser. >> > > >> > > Web browsers can open corrupted image files. >> > > >> > >> I tried the same code another to open another png file which I use >> > >> PIL to draw and save as png. The code above is able to open and >> > >> show >> > >> this png file properly. >> > > >> > > Sounds to me, as if the first PNG was broken. >> > > >> > > Try this: >> > > >> > > outI = Image.open( fileOutPNGFile ) >> > > outI.show() >> > > outI.save('test.png') >> > > out2 = Image.open('test.png') >> > > out2.show() >> > > >> > >> why might this happen? >> > > >> > > If the code doesn't help solving the issue, >> > > could you send the PNG to the list? >> > > >> > > Cheers, Matthias >> > > >> > > > > > _______________________________________________ Image-SIG maillist - Image-SIG@python.org http://mail.python.org/mailman/listinfo/image-sig
