:confetti_ball: Added .gitattributes & .gitignore files
Revert ":confetti_ball: Added .gitattributes & .gitignore files"

This reverts commit 1c8395f48116f162f75f6e73da20453e0bc02401.
Revert "Revert ":confetti_ball: Added .gitattributes & .gitignore files""

This reverts commit b136350a2016df28cd0b5c3b4c7985bbafdcd0e0.
opencv  feature extraction