Expert: Narendra - 4/12/2007

Question
Hi,

I have a 100 x 1000 picel black and white JPEG image. I'd like to convert the JPEG into a matrix (100x1000) where each entry represents the gray scale intensity of one pixel from JPEG. I'd like to use C language for that but I don't know what I need in order to open and read JPEG's. I heard I may need to download certain files for that. I'd be thankful for any ideas you might have to get me started. Thankfully, Andres.

Answer
You will need to understand the JPEG data format.
Then only you can understand what is written in a JPEG file.
You can open the file like any other file and it will be having binary data. Once you know the format, you can start checking the file contents.