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Image Querying with Complex Wavelets: Results of Experiments

Module by: Tom Mowad, Venkat Chandrasekaran. E-mail the authors

Summary: Gives quantiative results for the different approaches, highlighting strenghts and weaknesses of the old and new approaches.

We decided that for testing purposes we would test images from three categories:

  1. hand-drawn images (using mspaint)
  2. blurred images (which emulates scanned images)
  3. shifted images

From each category, we performed five tests using query images based on images from our database. For every test image we used, except for hand drawn image 5 (shown below), the expected image was returned in the top three percent of matched images when using the complex wavelet algorithm. Results using the real wavelet algorithm were similar, except for on shifted images, where the query images had significantly lower rankings (on the range of top 15%) than from our algorithm.

Figure 1
hand drawn 1
hand drawn 1 (hand1.jpg)
Figure 2
actual image
actual image (hand1act.jpg)
Figure 3
hand drawn 2
hand drawn 2 (hand2.jpg)
Figure 4
actual image
actual image (hand2act.jpg)
Figure 5
hand drawn 3
hand drawn 3 (hand3.jpg)
Figure 6
actual image
actual image (hand3act.jpg)
Figure 7
hand drawn 4
hand drawn 4 (hand4.jpg)
Figure 8
actual image
actual image (hand4act.jpg)
Figure 9
hand drawn 5
hand drawn 5 (hand5.jpg)
Figure 10
actual image
actual image (hand5act.jpg)
Figure 11
blurred 1
blurred 1 (blur1.jpg)
Figure 12
actual image
actual image (blur1act.jpg)
Figure 13
blurred 2
blurred 2 (blur2.jpg)
Figure 14
actual image
actual image (blur2act.jpg)
Figure 15
blurred 3
blurred 3 (blur3.jpg)
Figure 16
actual image
actual image (blur3act.jpg)
Figure 17
blurred 4
blurred 4 (blur4.jpg)
Figure 18
actual image
actual image (blur4act.jpg)
Figure 19
blurred 5
blurred 5 (blur5.jpg)
Figure 20
actual image
actual image (blur5act.jpg)
Figure 21
shifted 1
shifted 1 (shift1.jpg)
Figure 22
actual image
actual image (shift1act.jpg)
Figure 23
shifted 2
shifted 2 (shift2.jpg)
Figure 24
actual image
actual image (shift2act.jpg)
Figure 25
shifted 3
shifted 3 (shift3.jpg)
Figure 26
actual image
actual image (shift3act.jpg)
Figure 27
shifted 4
shifted 4 (shift4.jpg)
Figure 28
actual image
actual image (shift4act.jpg)
Figure 29
shifted 5
shifted 5 (shift5.jpg)
Figure 30
actual image
actual image (shift5act.jpg)

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