Follow point in AVI
- To: mathgroup at smc.vnet.net
- Subject: [mg123920] Follow point in AVI
- From: nlko <niko at homebound.de>
- Date: Fri, 30 Dec 2011 07:06:42 -0500 (EST)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
Hello, I want to follow a horizontal movement of a black object on white background in an AVI. My concept: - Import the first frame of the AVI - The frame is a "list of lists" : (x = 0 to 320, y = 0 to 240, z = RGBvalues)? How is the list sorted? - the AVI is black and white, RGB is coded with 8 bits? - values : 0 to 255 from white to black? - take one fixed y and show a list of x and their RGBvalues - go through x (from left to right, 0 to 320) and set a threshold for the RGBvalue : If RGB > some value, then : pick position x - save position of x in a list - import next frame of AVI Is it a good way to solve the problem? Do you have any hints? Thanks in advance, Nlko