Hi,
I am comparing results of ippiGetHuMoments_64f() with alternative implementation. There are equal results except for 5th moment (hu[4]). What can be cause of this? Does ippiGetHuMoments_64f() uses same equation as stated for example in wikipedia or in OpenCV : https://docs.opencv.org/2.4/modules/imgproc/doc/structural_analysis_and_... ?
Here are results for two objects:
1:
Alt. :Hu moments: 0,6320094033, 0,3361693204, 0,03546582373, 0,02023822563, 0,0005380840922, 0,01160643157, -0,00006672319914
Intel: Hu moments: 0,6320094033, 0,3361693204, 0,03546582373, 0,02023822563, 0,0005388502231, 0,01160643157, -0,00006672319914
2:
Alt. :Hu moments: 0,4550913598, 0,0651230286, 0,02186730725, 0,001194923098, -5,865595432E-6, 0,0003034540164, -1,704090629E-6
Intel:Hu moments: 0,4550913598, 0,0651230286, 0,02186730725, 0,001194923098, -5,866945186E-6, 0,0003034540164, -1,704090629E-6
As you can see there is only difference in 5th moment, which is quite strange.