Perceptual Image Hashing Based on Multitask Neural Network

Table 5

F₁ scores of different schemes in different content retention operations.

Operations	Proposed	DCP [7]	RP-IVD [4]	RP-NMF [3]	DAE NN-based [24]
Speckle noise	0.9996	0.9340	0.9409	0.9299	0.9995
Scaling	0.9996	0.8487	0.8909	0.9665	0.9993
Median filtering	0.9996	0.9631	0.9782	0.9891	0.9998
Circle average filtering	0.9988	0.9063	0.7121	0.7889	0.9895
JPEG compression	0.9993	0.7957	0.9383	0.9925	0.9998
Rotation and cropping	0.9990	0.6339	0.9936	0.9983	0.9961
Gamma correction	0.9987	0.9518	0.9903	0.8418	0.9999
Gaussian filtering	0.9991	0.9195	0.8148	0.8656	0.9992
Mean	0.9992	0.8708	0.9074	0.9216	0.9979