How to replace images from monitored content?

Hi, I wish you would support replacing images. The site administrator I use sometimes displays a blank image temporarily, and when there is an update, he replaces the image with a proper one. It’s a list of pre-order items on a site called FANZA. Please consider doing this if you’d like. Sorry if my English is bad because of Google translation.

@degouret do you need to remove images from the monitored content?