Howtosignalprocessing
- What is a steerable pyramid?
- How does Laplacian pyramid work?
- How is Gaussian pyramid constructed?
- What is pyramid blending?
What is a steerable pyramid?
A steerable pyramid, developed by Simoncelli and others, is an implementation of a multi-scale, multi-orientation band-pass filter bank used for applications including image compression, texture synthesis, and object recognition.
How does Laplacian pyramid work?
A Laplacian Pyramid is a linear invertible image representation consisting of a set of band-pass images, spaced an octave apart, plus a low-frequency residual. Formally, let. be a downsampling operation which blurs and decimates a j × j image , so that is a new image of size j / 2 × j / 2 .
How is Gaussian pyramid constructed?
How does it work? The "pyramid" is constructed by repeatedly calculating a weighted average of the neighboring pixels of a source image and scaling the image down. It can be visualized by stacking progressively smaller versions of the image on top of one another.
What is pyramid blending?
Pyramid image blending works by blending the Laplacian pyramids of two input photos: Page 2 using the Gaussian pyramid of a "mask" image as the alpha matte: The result of this blend is a new Laplacian pyramid from which we can reconstruct a full-resolution, blended version of the input photos.
