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“GrabCut”

“GrabCut”. Project Progress and Future Plans By: Matthew Marsh. What is “GrabCut”. “GrabCut” is an image segmentation technique My aim is to implement “GrabCut” as a plugin for Gimp Code written in C++ and C. Image Segmentation. Process of Splitting images into parts

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“GrabCut”

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  1. “GrabCut” Project Progress and Future Plans By: Matthew Marsh

  2. What is “GrabCut” • “GrabCut” is an image segmentation technique • My aim is to implement “GrabCut” as a plugin for Gimp • Code written in C++ and C

  3. Image Segmentation • Process of Splitting images into parts • “GrabCut” uses region and boundary information in the image to perform segemtation • Strong gradients indicate boundaries • Areas of colour coherence indicate regions

  4. How “GrabCut” Works • User Needs to help the algorithm by specifying foreground and background regions • Builds up a Graph where nodes represent pixels • Uses a Max-Flow algorithm to segment the graph, and the represented image

  5. Graph cut

  6. How My Plugin Works • Allows the user to paint on foreground and background regions. • Histrograms created from these “clues” from the user, and then uses the max flow algorithm to segment the image. • At the moment only using Greyscale images. • Use GDK to do all graphical interface

  7. Future Plans • So far only have a greyscale implementation • intend to implement colour • Can’t use histograms, have to use a Gaussian Mixture Model • If I have sufficent time implement a border matting feature to deal with hair and other fine textures.

  8. Guassian Mixture Models • I:\MixtureEM\JavaApp.html

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