[Starson17]

Originally Posted by scissors

I went to an imagemagik sit and found the -colorspace command. I tried colorspace=gray but calibre gives errors.

Did you implement it in a recipe and import as needed? My code for rotating images is in the sticky code thread of the recipe forum. You can see there how I used the rotate options.

Spoiler:

#Add these imports
from calibre.utils.magick import Image, PixelWand

    def postprocess_html(self, soup, first):
        #process all the images. assumes that the new html has the correct path
        for tag in soup.findAll(lambda tag: tag.name.lower()=='img' and tag.has_key('src')):
            iurl = tag['src']
            img = Image()
            img.open(iurl)
            width, height = img.size
            print 'img is: ', iurl, 'width is: ', width, 'height is: ', height 
            if img < 0:
                raise RuntimeError('Out of memory')
            pw = PixelWand()
            if( width > height ) :
                print 'Rotate image'
                img.rotate(pw, -90)
                img.save(iurl)
        return soup