saving a .IMG file into .TIF format

[samik]

hi all,
I have got a bunch of files with .IMG extension and a c code which on execution asks for the input file name and then displays the image on the screen. but i want to save the image in a jpg or tif format. what addition i should make in the code for doing that ( i guess it has got to do something with file handling)

[brewbuck]

hi all,
I have got a bunch of files with .IMG extension and a c code which on execution asks for the input file name and then displays the image on the screen. but i want to save the image in a jpg or tif format. what addition i should make in the code for doing that ( i guess it has got to do something with file handling)

Sure, in the sense that building a house has something to do with nails...

The TIFF format, while not overly complicated, isn't exactly trivial either. And you can't even begin to solve this problem without understanding more about this "IMG" file format.

[matsp]

You are probably best off working of some existing library, since almost all variants of image format is fairly complex - both JPEG and TIFF are formats that require a fair bit of work to store the image itself. JPEG is probably a bit harder to implement than TIFF. But as I started out, there are good libraries about that do all the hard work for you, all you need to do is give it some basic settings (e.g. the name of a file to store the image in, number of bits per pixel, how many pixels (X, Y) and where the pixels themselves are stored in memory). Shouldn't take more than about half a day to a day to achieve that.

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Mats