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Roles of local and global information in image classification

Roles of local and global information in image classification. Devi Parikh. Aeroplane. Car-rear. Face. C oast. H ighway. M ountain. S treet. OSR. Inside city. Open country. Tall buildings. Forest. Ketch. Watch. Motorbike. Bathroom. Bedroom. Dining room. Gym. ISR. Stair case.

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Roles of local and global information in image classification

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  1. Roles of local and global information in image classification Devi Parikh

  2. Aeroplane Car-rear Face Coast Highway Mountain Street OSR Inside city Open country Tall buildings Forest Ketch Watch Motorbike Bathroom Bedroom Dining room Gym ISR Stair case Kitchen Living room Movie theater CAL

  3. Jumbled Images

  4. Human Study: Intact Images

  5. Human Study: Jumbled Images

  6. Human Recognition of Jumbled Images Accuracy

  7. How do we recognize them? … Are existing machine implementations of this model good enough? Majority Vote of Local Independent Decisions? MRF Inference?

  8. Human Studies: Individual Blocks

  9. Human Recognition of Individual Blocks Accuracy

  10. Machine Experiments • Assign blocks to codewords • Accumulate p(scene|codewords) • Pick class with highest votes

  11. Majority Vote Results Proportion of matched responses

  12. Classification of Jumbled Images Accuracy Need advanced modeling of global information

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