Difference between revisions of "Team:Cambridge-JIC/Autofocus"
KaterinaMN (Talk | contribs) |
KaterinaMN (Talk | contribs) |
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<li><p>Tested out focus scores based on variance since this was recommended by both sources [1][2] on artificially blurred out images (Gaussian blur with different standard deviations). This worked well. Variance was chosen as the focus measure to implement since it is quick to evaluate, and numpy has a function that does this already.</p></li> | <li><p>Tested out focus scores based on variance since this was recommended by both sources [1][2] on artificially blurred out images (Gaussian blur with different standard deviations). This worked well. Variance was chosen as the focus measure to implement since it is quick to evaluate, and numpy has a function that does this already.</p></li> | ||
− | <li><p>Implemented an autofocus method for multiresolution search (described in the textbook [2], section 16.3.3</p></li> | + | <li><p>Implemented an autofocus method for multiresolution search (described in the textbook [2], section 16.3.3).</p></li> |
<li><p>Implemented DWT (Discrete Wavelet Transform) to decompose image to low resolution versions. This was expected to allow for faster computation and autofocusing. In practice, there was no significant computational advantage from this, so low-res images were not used in the final algorithm.</p></li> | <li><p>Implemented DWT (Discrete Wavelet Transform) to decompose image to low resolution versions. This was expected to allow for faster computation and autofocusing. In practice, there was no significant computational advantage from this, so low-res images were not used in the final algorithm.</p></li> | ||
<li><p>Implemented a hill climbing algorithm to locate an interval, within which to locate most focused position. This assesses the focus scores of individual frames.</p></li> | <li><p>Implemented a hill climbing algorithm to locate an interval, within which to locate most focused position. This assesses the focus scores of individual frames.</p></li> |
Revision as of 22:11, 17 September 2015