Utilizing vision systems at a wellsite, which may include operating a video camera to generate a video signal comprising images of one or more pieces of equipment or components and receiving the video signal by a processing system, which may then process the images to determine physical and/or operational characteristics associated with the one or more pieces of equipment in the images. The video signal may contain images of a crown block and/or a drawworks of a hoisting system at an oil and gas drill rig. The processing system may then process the video signal to determine when a traveling block of the hoisting system is within a threshold distance from the crown block.