Image Recognition Based on Two-Dimensional Principal Component Analysis Combining with Wavelet Theory and Frame Theory

Table 2

The comparison of the recognition time between the 2DPCA algorithm and this algorithm under different principal components in the ORL Library (s).

principal component	P=6	P=8	P=10	P=20	P=45
2DPCA	1.8722	2.1367	2.5691	3.2425	3.8973
WT-2DPCA	1.7879	2.1109	2.3078	3.1213	3.3677
The frame theory without wavelet transform 2DPCA	1.5456	2.0139	2.1214	2.8476	3.1911
The algorithm in this paper	1.5153	2.0031	2.1128	2.7659	2.9098