Accuracy
Reason to Measure
The machine has no sensors and moves in a consistent programed motion. The machine doesn't actively catch the ball, but instead relies on the accuracy of the throw to direct the ball to where the hand will be.
The ball will drop if the throw is too far from the center of the hand.
A continuous run of about 3,000 throws (half-an-hour) was recorded on video. Computer vision was used to track the balls in a region of interest before the catch.
Composite Image
A continuous run of about 3,000 throws (half-an-hour) was recorded on video. Computer vision was used to track the balls in a region of interest before the catch.
A faint white line was drawn for each throw path.
Results:
I analyzed a horizontal line fairly low on the figure (but above the imperfection in the bottom right). Light intensity is displayed in the graph.
The light intensity is proportionate to the number of times the ball traveled within that path. The light intensity is essentially a "histogram" of the data along any given horizontal.
