Re: convert png with transparency to jpg

>i have tried -fill white and -backgroud white too, but i don't know
>why -opaque or -flatten is needed.


convert image.png -fill white -opaque none image.jpg


this replaces transparency (-opaque none) with white. The -opaque 
none specifies that there are pixels with transparency (no opacity) 
to be replaced and the -fill white is the replacement color



convert image.png -background white -flatten image.jpg


this simply applies a white background over which the image is 
composited (-flatten) so that looking through the transparent areas 
one see white and then turns off the transparency. Thus where ever 
there was transparent white shows in its place.


Fred