In the documentation of the Ghiro website it says "Sometimes when a photo is edited, if the image editing software does not support image preview, the original image is edited but the thumbnail not. A simple comparison between the original image and the thumbnail could detect image edits.
I want to ask if there is any image editing software that doesn't provide thumbnail previews? Because even Window's 'paint' software updates the thumbnail after editing.
Also, is there a particular feature for thumbnail consistency checking because I couldn't find it in Ghiro. I guess it's up to the analyst to check differences in the image and thumbnail manually then?