reading jpg image

[biplab]

Hi all,

s it possible to read a jpg image in C language??and after reading the
image,can I perform some manipulations on the pixel values to perform
some image processing tasks and the output the new modified image??

Thanks in advance.

biplab

 

[osmium]

s it possible to read a jpg image in C language??and after reading the
image,can I perform some manipulations on the pixel values to perform
some image processing tasks and the output the new modified image??

Yes, you can do that. Be sure to open both files in binary mode. You
wouldn't *have to* in Unix but I think it is a good practice to follow
anyway.

 

[bartc]

Hi all,

s it possible to read a jpg image in C language??and after reading the
image,can I perform some manipulations on the pixel values to perform
some image processing tasks and the output the new modified image??

Sure. But jpg format is quite complicated and normally you'd use an existing
library to do the work of reading jpg and writing it out again.

(I used one very good library for Windows, Intel's IJL, supplied as DLL
files and some C headers, but I think Intel has withdrawn that product and
you might only come across it bundled with the odd application. But there
should be other libraries out there supplied as sources.)

 

[Boon]

Is it possible to read a JPEG image in C language? and after reading the
image, can I perform some manipulations on the pixel values to perform
some image processing tasks and the output the new modified image?

(Your question is not about the language.)

You might want to take a look at libjpeg.

http://en.wikipedia.org/wiki/libjpeg
http://www.ijg.org/
http://jpegclub.org/

 

[BGB / cr88192]

http://www.personal.leeds.ac.uk/~bgy1mm

yep, I have one that does this as well, but I don't have it standalone in
any easily-downloadable place...


ok, put something on my server, this may help:
http://cr88192.dyndns.org/bgb.proj.pdsys42/libpdgl/base/render/jpg1.c


look at the source, as minor alterations will be needed to use.
no restrictions here, use as you will...