This contribution provides the results of a validation test of ECM-6.0 using DIV2K and Flikr2K datasets to test the performance of ECM on images of various subjects. Experimental results show -6.91%/-17.03%/-17.30% and -6.58%/-14.81%/-15.20% (All-intra, Y/U/V) on DIV2K and Flickr2K, respectively under all-intra condition. Experimental results confirmed that the performance is on per with that on Class-B CTC contents.