Implementing a Parallel Image Edge Detection Algorithm Based on the Otsu-Canny Operator on the Hadoop Platform

Table 1

Comparison of the running times of different algorithms under different data scales.

Image scale	Running time (S)
	Canny algorithm	Otsu-Canny algorithm [21]	Parallel Canny algorithm	The proposed approach (4 slave nodes)
1,000	30	30	27	28
3,000	58	60	51	50
8,000	92	95	76	75
16,000	155	159	93	93
30,000	487	488	199	201
60,000	840	843	275	276