Jitter Colour Filter

brcosa, or scalebias will increase the 'contrast' and boost the
colors, as will operands of jit.op, a lowpass flter would be
something akin to jit.op @op > @val 20, which would not pass any
value less 20 out of 255 (assuming char data)

You could also do a jit.unpack to split each of the color planes into
individual greyscale matrices.

On Dec 27, 2006, at 7:17 PM, Ben Harvey wrote:

>
> Hi,
>
> I am making a project for uni which tracks colours and I am trying
> to filter-out colours which I don't want to be included.
>
> I have used the jit.op object to remove the background so i am left
> with the person and a black background. The person has different
> coloured pieces of felt attatched to his hands and feet and my
> patch so far is tracking the colours fairly well. However, I need
> to be able to track more efficiently for this project.
>
> I am using the jit.findbounds object to select the minimum and
> maximum colour range I want to track, is there a way to boost just
> the 'band' of colour I want to track, making it easier to detect?
>
> Also, I am trying to filter out low amounts of colour that conflict
> with the colours being tracked. I know it's possible to make a low-
> pass filter using jit.op but im a bit confused by the help files
> and examples in the max/msp folder.
>
> Any help I could get regarding the above would be very much
> appreciated.
>
> Many thanks

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