Yes, that's exactly what I would like to do. I need to do modification on
pixel values directly. Like making the photo to grayscale or colorize it.

I found a Jpeg software decode/encode library. But it can only output 16-bit
"Bitmap" object. I need something like a 24-bit Bitmap object so I can
manipulate image pixel values directly.

Picco

> Picco Chu wrote:
>
> > Does anyone know how to decode a .jpg file into some editable image data
> > with 24-bit (8-bit for each R,G,B channel) value for each pixel? And
save
> > back to .jpg after edit?
>
>
> What do you mean by "editable"? Most photo editing softwares do exactly
> that: decodes jpg, lets you edit it and later save it back to jpg. You
> can also save it as uncompressed tiff for raw rgb values. Could you be
> more specific on what you want to accomplish?
>
> Paapaa
>



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