how to convert bitmap image to CIELab image?
- by Neal Davis
Hello to stackoverflow members! This
is my first post but I love reading
the questions and answers on this
forum!
I'm using VS2008, CSharp, NET 3.5 and
Windows XP Pro latest patches on this
project.
I am reading in a jpeg file to a
bitmap image using CSharp in the
following way:
Bitmap bmp = new Bitmap("background.jpg");
Graphics g = Graphics.FromImage(bmp);
I then write some text and logos on g
using various DrawString and DrawImage
commands. I then want to write this
bitmap to a tiff file using the
command:
bmp.Save("final_artwork.tif", ImageFormat.Tiff);
I don't know what the TIFF tags in the
header of the final resultant TIFF
file will be when you do bmp.Save as
shown above?
But what I want to produce is a TIFF
image file with PHOTOMETRIC CIELab,
BITSPERSAMPLE 8, SAMPLESPERPIXEL 3,
FILLORDER MSB2LSB, ORIENTATION
TOPLEFT, PLANARCONFIG CONTIG, and also
uncompressed and singlestrip.
Im fairly certain, at least I have not
found anything about Microsoft API and
CIELab, I can not convert the bitmap
image to CIELab photometric and the
other requirements using anything from
the Microsoft API or .NET 3.5
environment - someone please correct
if I am wrong.
I have used libtiff in a project in
the past but just to write a tiff file
where the tiff image in memory was
already in CIELab format and all the
other requirements as noted per above.
Im not certain libtiff can convert
from my CSharp bitmap image, which is
probably RGB photometric, to CIELab, 8
bps, and 3 spp?
Maybe I can use OpenCVImage or Emgu CV
or something similiar?
So the main question is what is going
to be the easiest way to get my final
bitmap image as outlined above into a
CIELab TIFF and also meeting the other
requirements per above?
Thanks for any suggestions and code
fragments you can provide?
Neal Davis
