Table 4: Randomly select the cropping position and the extracting result.

, Randomly croppedQuadrately croppedAmbiently cropped

Cropped watermarked image406349.tab.004a406349.tab.004b406349.tab.004c
Extracted watermark before reverse transformation406349.tab.004d406349.tab.004e406349.tab.004f
Extracted watermark after reverse transformation406349.tab.004g406349.tab.004h406349.tab.004i