Just a quick tutorial to get some of you use to colour tracking.
I have found colour tracking to be quite difficult to implement, this does not mean its impossible – just awkward at times!
Here is a screen shot of a basic colour tracking patch:
Using the chroma key you can filter the colour that is seen by the Eyes actor. Currently, the image above shows only the yellow colour being allowed through the actor. This means, only objects with the colour yellow will be tracked.
If you want to change the colour to be tracked, you can do this by changing the KEY HUE input, a bigger image of the Chroma actor can be seen below at its default state or ‘red’.
The output of the actor is then fed into the Eyes actor. You can adjust the threshold of the Eyes Actor to filter out any unwanted colour/noise and Eyes will work as normal (same with Eyes++)
A good idea is to change the key hue and then snapshot the colours using the snapshot features at the top of the Isadora window. Then you can jump between different colours much easier and the values will be stored. Then get creative!
EDIT: A very quick and very basic working example: