Convert to grayscale using RGB to GRAY instead of BGR to GRAY.
Convert to grayscale using RGB to GRAY instead of BGR to GRAY.

The image arrays loaded in dataset are inverted from the default BGR OpenCV color format to RGB and should therefor be converted to grayscale using RGB to GRAY since grayscale conversion weighs the color channels differently.

sunbingfengPI/OpenSFM_Test,onecue/OpenSfM,onecue/OpenSfM,sunbingfengPI/OpenSFM_Test,BrookRoberts/OpenSfM,onecue/OpenSfM,onecue/OpenSfM,mapillary/OpenSfM,BrookRoberts/OpenSfM,sunbingfengPI/OpenSFM_Test,BrookRoberts/OpenSfM,oscarlorentzon/OpenSfM,mapillary/OpenSfM,NicWayand/OpenSfM,edgarriba/OpenSfM,mapillary/OpenSfM,oscarlorentzon/OpenSfM,oscarlorentzon/OpenSfM,NicWayand/OpenSfM,oscarlorentzon/OpenSfM,sunbingfengPI/OpenSFM_Test,mapillary/OpenSfM,NicWayand/OpenSfM,onecue/OpenSfM,sunbingfengPI/OpenSFM_Test,oscarlorentzon/OpenSfM,edgarriba/OpenSfM,mapillary/OpenSfM,NicWayand/OpenSfM,edgarriba/OpenSfM,edgarriba/OpenSfM,BrookRoberts/OpenSfM,edgarriba/OpenSfM,BrookRoberts/OpenSfM,NicWayand/OpenSfM