Re: [Boost-users] How to convert cmyk jpg file to rgb jpg file with BOOST.GIL?

Subject: Re: [Boost-users] How to convert cmyk jpg file to rgb jpg file with BOOST.GIL?
From: Mateusz Loskot (mateusz_at_[hidden])
Date: 2013-11-12 06:34:22

On 12 November 2013 04:21, Guangchao Wang <guangchao0831_at_[hidden]> wrote:
> I used following  code:
>
> rgb8_image_t rgb8Img;
>
> jpeg_read_and_convert_image("CMYK.jpg", rgb8Img); //CMYK.jpg is CMYK image
>
> jpeg_write_view("RGB.jpg", const_view(rgb8Img));
>
> to convert CMYK image to RGB image.
>
> The saved RGB.jpg is not correct.
>
> Could you give me some suggestion?

Try this to see if all steps separately will work:

cmyk8_image_t cmyk;
jpeg_read_image("CMYK.jpg", cmyk);

rgb8_image_t rgb(cmyk.dimensions());
copy_pixels(color_converted_view<rgb8_pixel_t>(view(cmyk)), view(rgb));

jpeg_write_view("RGB.jpg", const_view(rgb));

Best regards,
-- 
Mateusz  Loskot, http://mateusz.loskot.net