Authors: Matthew Walker and Linda Shen
Almost all of the commits may be golvok(Matthew Walker)'s, but we pair-programmed essentially the whole thing.
This is our final project for Digital Systems (ECE241). Here follows some random excerpts from the report, and scroll down for some video.
###Intro
The goal of this project was to detect and track motion in real time. Images were extracted from a video camera and analyzed to determine movement between each frame and the centre of motion was tracked. The results were filtered and displayed.
The project was done on an Altera DE2 board. (Cyclone II)
###Block Diagram
###Smoothing
To smooth the binary image, the 8 pixels surrounding the current pixel, as well as it’s value, are considered. If all 9 are high, we display the center one as high. To minimize the number of clock cycles needed, the pixels are loaded into 3 shift registers, one for the row above, below, and current. They are then shifted as it moves across the image.
###Centroid Calcultation The centroid is computed by dividing the x and y totals by the difference count. This must be done at a slower clock speed, as the dividend and divisor are large and variable.
###Motion Tracking/History The centroid is stored in a shift register that keeps the centroid location of 20 frames. This history is drawn to show the path of motion, in the lower right corner of the screen.
###"Random" 3 Cycle Delays There is a 3 clock cycle delay between the setting of the read address and the value being ready from the RAMs. We buffer pixel locations in several places to accommodate this delay.
###Short Demo
###Long Demo
