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Generate Tiff Thumbnails using PIL

This was tricky because not all browsers show Tiff images so the trick is to generate the thumbnails as jpg.

                    thumb_image_format = None
                    if mimeType == "image/tiff" :
                        thumb_image_format = "JPEG"
                    ret_value = utils.create_thumbnail_pil(inputPath, outputPath, thumb_image_format)


    def create_thumbnail_pil(self, infile, outfile, thumb_image_format=None):
        import Image
        size = 100, 100
        try:
            im = Image.open(infile)
            new_image = im.copy()
            if new_image.mode == "CMYK":
                self.logger.info('converting CYMK to RGB for %s' , outfile)               
                new_image = new_image.convert("RGB")
            new_image.thumbnail(size, Image.ANTIALIAS)
            if thumb_image_format == None:
                thumb_image_format = im.format
            new_image.save(outfile, thumb_image_format)
            return "OK: %s saved successfully" % outfile
        except (IOError, ValueError):
            self.logger.exception("Error creating thumbnail")
            #remove 0 bytes file
            if os.path.exists(outfile):
                os.remove(outfile)
            return "ERR: Error creating thumbnail for %s" % infile

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