multiple CurveTool nodes executed on frame by frame basis?

Hi,

I have many CurveTool nodes in the script sampling Avg. Intensities of cropped areas of the same source image sequence for further processing downstream. Is there a way to:

1. execute all CurveTool nodes (make them "Go") in the script on a frame by frame basis as you scrub through the timeline, and better yet,

2. the CurveTool will dynamically re-calculate the Avg. Intensities themselves as the input data changed even for the same frame.

If there is a better node/command for dynamically sampling Avg. intensities of specified areas of an image (or image sequence) as the image being modified upstream, I would love to know.

Thanks,
Jason

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