Improved CNN-Based Hashing for Encrypted Image Retrieval

Table 1

Retrieval precision of different input image sizes (%).

Method		k
Image size	Bits	20	40	60	80	100
384 × 384	12 bits	73.92	73.56	73.04	72.55	60.38
	24 bits	82.33	82.31	82.36	82.29	67.21
	32 bits	84.82	84.80	84.75	84.69	69.06
	48 bits	86.23	86.21	86.15	86.08	69.91
224 × 224	12 bits	72.55	72.29	72.13	71.85	59.63
	24 bits	80.10	80.02	80.01	79.90	65.23
	32 bits	81.50	81.42	81.38	81.34	66.37
	48 bits	82.26	82.24	82.19	82.11	66.01