A Robust Coverless Image Steganography Algorithm Based on Image Retrieval with SURF Features

Table 3

The comparison of the number of images required to transmit secret messages of different lengths and their respective capacities.

Algorithm					Capacity
	1B	10 B	100B	1 KB
LDA_DCT [18]	2	7	55	548	15
DenseNet_DWT [19]	2	7	55	548	15
DCMH-CNN [32]	1	5	50	512	16
Our method	1	5	50	512	16