According to http://www.jpeg.org/public/jfif.pdf (page 7): "Xdensity and Ydensity should always be non-zero".
I guess it should be respected, ICC profile or not.
According to http:// www.jpeg. org/public/ jfif.pdf (page 7):
"Xdensity and Ydensity should always be non-zero".
I guess it should be respected, ICC profile or not.