1. An image transmitting apparatus comprising: region detecting means for detecting, in an image, a region of interest that matches a predetermined condition; resolution converting means for selecting, for reducing resolution of the image, an image passed through a low-pass filter as an image outside the region of interest detected by the region detecting means and an image not passed through the low-pass filter as an image inside the region of interest; and transmitting means for transmitting, to a destination, the image with resolution reduced by the resolution converting means and positional information of the region of interest.