code ....\.DS_Store __MACOSX ........\code ........\....\._.DS_Store code\building.bmp __MACOSX\code\._building.bmp code\main.m __MACOSX\code\._main.m code\Sobel.m __MACOSX\code\._Sobel.m code\test_image.jpg resulting images ................\.DS_Store __MACOSX\resulting images ........\................\._.DS_Store resulting images\building_sobel_edge.bmp