On 2013-01-28 16:53:44 +0000, Jean-Baptiste BUTET said:
Hi all, I have a 1394 cam that has a 16 bit greyscale output. How can I handle this under PIL ? Matrix has this shape : [ [ ][ ] [ ]...] and come frome libdc1394 wrapper. 8 bit is well recognise and treated : ---------8 Bits---------- matrix = cam0.current_image i = Image.fromarray(matrix) i.save("mypicture.jpg") (or png, or bmp ...) ---------16 bits---------- (code found somewhere) matrix = cam0.current_image if j ==0 : print matrix.size, len(matrix[0]),type(matrix) ## 'F' correspond au mode de conversion : F pour Float, bien sûr ## [667,800] est la taille de l'image à créer, dans mon cas img = Image.fromstring('F',[480,640], matrix) nom = "t"+str(j)+".tif" tiff = nom fim = open(tiff, 'wb') ## Et conversion en entiers, en précisant le nombre de couleurs... img = img.convert('I', colors=65536) ## Sauvegarde au format TIFF. BMP, JPEG, PNG ne sont pas compatibles ## avec le format des données img.save(fim, 'tiff') fim.close() ---------------------------- ---> result Mode: 640x480_Y16 <- 16 bits OK for cam ! Framerate: 30 307200 640 <class 'pydc1394.camera.Image'> <- lenght of string, width Traceback (most recent call last): File "16save_image.py", line 78, in <module> img = Image.fromstring('F',[481,641], matrix)File "/usr/lib/python2.7/site-packages/PIL/Image.py", line 1797, in fromstringim.fromstring(data, decoder_name, args) File "/usr/lib/python2.7/site-packages/PIL/Image.py", line 594, in fromstring raise ValueError("not enough image data") ValueError: not enough image data I really don't see what the problem... Thanks for response.
Does it happen with Pillow too? If so, please report the issue here: https://github.com/python-imaging/Pillow/issues
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-- Alex Clark · https://www.gittip.com/aclark4life/ _______________________________________________ Image-SIG maillist - Image-SIG@python.org http://mail.python.org/mailman/listinfo/image-sig
