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Outline of Paper: “How many pixels make an image ?” Antonio T orralba

Outline of Paper: “How many pixels make an image ?” Antonio T orralba. Roger S. Gaborski. This presentation is an outline of the paper “How many pixels make an image?” by Antonio Torralba Some material (images, graphs, etc.) taken from original paper .

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Outline of Paper: “How many pixels make an image ?” Antonio T orralba

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  1. Outline of Paper: “How many pixels make an image?”Antonio Torralba Roger S. Gaborski Roger S. Gaborski

  2. This presentation is an outline of the paper “How many pixels make an image?” by Antonio Torralba • Some material (images, graphs, etc.) taken from original paper Roger S. Gaborski

  3. 2816 x 1880 PixelsHow many pixels do we really need? Roger S. Gaborski

  4. Gist of a scene • Gist of a scene- scene category and a few objects in the scene • What is the minimum resolution needed for scene recognition and object recognition? Roger S. Gaborski

  5. Image Database • http://people.csail.mit.edu/torralba/code/spatialenvelope/ • Categories: • Coast • Forest • Highway • Inside city • Mountain • Open country • Street • Tall building Roger S. Gaborski

  6. Sample of partial code img = imread('hous24.jpg'); img = im2double(img); f = [ 1 1 1 1 1;... 1 4 4 4 1;... 1 4 6 4 1;... 1 4 4 4 1;... 1 1 1 1 1]; f = f/(sum(f(:))); I256 = img; I256f = imfilter(I256, f); I128 = imresize(I256f,.5,'nearest'); %filterimagebeforesubsampling Roger S. Gaborski

  7. What is this image? Roger S. Gaborski

  8. What is this image? Roger S. Gaborski

  9. What is this image? Roger S. Gaborski

  10. Roger S. Gaborski

  11. Roger S. Gaborski

  12. Roger S. Gaborski

  13. Roger S. Gaborski

  14. Roger S. Gaborski

  15. Roger S. Gaborski

  16. 47 x 71 x 3 21 x 31 x 3 Two individuals Outdoor scene Roger S. Gaborski

  17. “How many pixels make an image?”Antonio Torralba Roger S. Gaborski

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