A semi-fragile image tamper detection system and method based on thumbnail
hiding and which signifies the image areas in which tampering has
occurred, is provided. A thumbnail is defined as a low-resolution version
of an entire image or the significant features of an entire image.
Thumbnail hiding is chosen to be resilient to effects of both image
compression and low levels of transmission channel noise. The thumbnail
computation and embedding techniques are chosen such that the resultant
marked image corresponds in size and dynamic range to the original image.
