Re: convert png with transparency to jpg

thanks for your explanations.
i have mentioned that before:
On Mon, Jan 25, 2010 at 10:15, Pete Whatever <[email protected]> wrote:
>> Try this:
>>
>> convert w.png -background white -flatten w1.jpg
>>
>> Best Wishes
>> Pete

On Mon, Jan 25, 2010 at 14:10, Fred Weinhaus <[email protected]> wrote:
>>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
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