Wanted a super quick way of insetting a snapshot of the original image before it goes through the filter chain. So here's the filter for just that, you just drag PiP into composer wire the output of the filters to it and you get this..



I've written it as a utility filter but it does have sliders so if you want to get creative with it and post the results be my guest! It honours transparency from the input images and you can scale the inset to be larger than the original if you want so have fun. Just as a lame example..



CODE:

#Picture In Picture V0.0
#Written by step7 (2012)
#Insets a positionable, scalable 2nd image within a main image
#
#Wiring:
#in1 - Primary image
#in2 - Secondary image to be inset into primary image
#
#User Values:
#PiP_x, PiP_y - position inset image
#PiP_scale - Main image is scaled down by this factor
#when producing the inset (have fun with scaling <1)
#PiP_opacity - Sets the inset opacity
#
#
#Contact me about the filter on Gimp Chat Forum or Mathmap Google Group
#
filter PiP(image in1, image in2, float PiP_x:-1-1 (0.6), float PiP_y:-1-1 (-0.6),float PiP_scale:0-16 (3.5),float PiP_opacity:0-1 (1))
qq=in2(xy:[(x-PiP_x)*PiP_scale,(y-PiP_y)*PiP_scale]);alp=alpha(qq)*PiP_opacity;in1(xy)*(1-alp)+qq*alp end

Thanks step7.

You've taken a real fancy for MathMap.
Nice script, how about a transform option or put the inset on a separate layer so it could be freely manipulated in MathMap?

LOL yeah stuck on Mathmap, it'll wear off when I've exhausted all the possibilities, you'll be running Gimp 32.8 by then

What transform options would you like?
Bear in mind transforms can be applied to the inset image before its passed to PiP.

Not sure what you mean by "put the inset on a separate layer" - please elaborate (I'm a bit slow and you may have to resort to drawing pictures). The filter has two inputs so both the main and inset images can be sourced from separate Gimp layers if that's what you mean.

I'll post some more examples shortly to elaborate. Meantime please keep any suggestions coming.

OK an example using an image from a Gimp layer and applying a rotate transform prior to PiP in composer. (Notice the transparency on the inset).

This would be the bomb.
When you activate your expression you have an inset picture you can totally manipulate independently of the original image. Like now you can x y, opacity and scale, why not add a transform option for the inset? The transform would be some type of rotation.

i think may be added using it (with the composer )