I should note that you do still get some black edges even with the
crop patch, which end up being more vignette like, but still very
apparent, this is because edge pixels outside the boundary of the
image are calculate before the crop and taken into consideration for
values within the boundary depending on the width of the blur. This
may be technically correct for usages where your input image is placed
within a larger canvas (think photoshop, you want your edges to blur
out to be transparent), but can be odd/unexpected in video when you
want your blur to blur the whole frame and nothing but the frame.
Anyway :)
On Sep 15, 2009, at 6:57 PM, George Toledo wrote:
A common practice would be to chain an Image Crop patch after a
blur, or any of the CI patches that change the image bounds. Then,
one would take an Image Dimensions patch, connect it's input to the
image source, and then take the pixel w/h out, and connect it to the
Image Crop patch, thereby eliminating the edges. If you do that, you
can eliminate it with standard patches. You can pull up the Image
Filter example composition at the QC startup that shows a CI Zoom
Blur setup in this way, along with some mouse interaction macro to
adjust for how large the viewer is.
-George Toledo
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