Jan 24 2011

Using a Movie Brush for Stack Filtering Effects

by Synthetik in Uncategorized


Yesterday’s post described how to build a custom movie brush from a personal collection of images. With the ultimate goal of using the movie brush to build a photo mosaic effect in the paint synthesizer. But there are other applications of a custom movie file composed of a disparate set of individual images, like stack filtering. Today’s post will describe how to use temporal image processing effects to build artistic stack filtering effects from your custom movie brush files.

As i mentioned in yesterday’s post, i photographed 2 different sets of images in my quest for building some custom movie brushes. The first was a collection of individual photos of boulders at the beach, which we used for yesterday’s photo mosaic effect. But i also photographed a collection of different driftwood photos. We’ll be using the driftwood photos for the movie brush used for today’s stack filtering effect (shown above).

The paint action sequence (PASeq) used to create the image above is shown below.

The control panel settings for the first Temporal Difference Matte action step are shown in the 2nd gallery image above. This first action step is what creates the effect you see in the image at the top of the post. The rest of the PASeq is really just a set of standard optimization steps i typically use to sharpen and contrast optimize a final output image.

Note that a 31 frame movie brush is leaded as the source movie in the 2nd gallery image above. The particular effect generated at the top of the post was created by processing a 7 frame window centered at frame 13, using the associated parameter settings for the Temporal Difference Matte effect shown in the 2nd gallery image.

The steps i used to convert my folder of driftwood images into a movie file are exactly the same as what we detailed in yesterday’s post. The only difference is that i picked the driftwood image folder as my source folder for the Action : Process with Paint Action Sequence : Image to Movie menu command. And i choose a 720 x 480 pixel canvas size for my movie frame output ( as opposed to the 128 x 128 pixel frame size used in yesterday’s post).

We have discussed stack filtering before here in previous posts.

For an introduction to temporal image processing effects, check out this tip.