copyChannels      667 modules/cudalegacy/src/fgd.cpp         copyChannels(curFrame, prevFrame_, 4);
copyChannels      702 modules/cudalegacy/src/fgd.cpp         copyChannels(firstFrame, background_, 4);
copyChannels      703 modules/cudalegacy/src/fgd.cpp         copyChannels(firstFrame, prevFrame_, 4);