Example how to crop jpeg image from file using 'Image Util'. Here ad->fileList[ad->curIndex] is some char string with path to file.
http://tizen.org/privilege/mediastorage should be in manifest.
Also, fyi:
This code snippet applicable if Exif Orientation is ORIENTATION_NORMAL (equal 1)
How to get exif orientation
https://developer.tizen.org/community/code-snippet/native-code-snippet/how-get-exif-orientation
In other cases you need to perform rotation transformation with ret = image_util_transform_set_rotation before.
Alexey.