How to re-size .bmp file in C\C++?

Question

I am doing a CBIR system as an assignment.There are 100 .bmp files,but they have different size,how to re-size them to a same size? Thanks.

Answer 1

Have a look at the CImg Library, it's quite easy to use. You can load your bitmap file then use one of the resize function.

Answer 2

Probably a overkill, but you can take a look on ImageMagick.

Answer 3

You should look at G'MIC, a command-line tool to batch image processing operations. It is even more advanced than ImageMagick's convert tool.

Basically, you can call it like this :

gmic *.bmp -resize 128,128,1,3,3 -outputp resized_

to resize all your bmp images into 128x128 color images, and save them with filenames prefixed by 'resized_'.

G'MIC is available for Linux, Windows and Mac, at : http://gmic.sourceforge.net