I was trying to run the opencv gender classification example from this site,
When I try to run the facerec_fisherfaces.cpp it gives an error saying,
OpenCV Error: Unsupported format or combination of formats (In the Fisherfaces method all input samples (training images) must be of equal size! Expected 40000 pixels, but was 0 pixels.) in train, file /home/kavin/opencv/opencv-2.4.10/modules/contrib/src/facerec.cpp, line 564
terminate called after throwing an instance of 'cv::Exception'
what(): /home/kavin/opencv/opencv- 2.4.10/modules/contrib/src/facerec.cpp:564: error: (-210) In the Fisherfaces method all input samples (training images) must be of equal size! Expected 40000 pixels, but was 0 pixels. in function train
Aborted (core dumped)
This was because there was an empty row in the csv file and also the encoding had to be UTF-8