Rank: 6828 based on 16 downloads (last 30 days) and 1 file submitted
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Maxime

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05 Jan 2011 Screenshot ptimtransform ptimtransform transforms an image and a list of points all together. Author: Maxime transform, image, points, point set, rotate, imrotate 16 0
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30 Jul 2012 NRRD Format File Reader Read imagery and metadata from .nrrd medical imaging format files. Author: Jeff Mather

13 May 2011 Efficient K-Means Clustering using JIT A simple but fast tool for K-means clustering Author: Yi Cao

Although not a perfect way to solve the above-mentioned issue, adding the following two lines after the update of the centroids solved the problem in my case:

idnan = find(isnan(c(:,1)));
c(idnan,:) = X(randi(n,length(idnan),1),:);

13 May 2011 Efficient K-Means Clustering using JIT A simple but fast tool for K-means clustering Author: Yi Cao

Pretty fast indeed!

However, the number of cluster is sometimes not respected. The algorithm yields a lower number of clusters, replacing additional centroid by NaN. This can be inconvenient.

26 Feb 2011 Separable N-Dimensional Convolution N-dimensional convolution for separable kernels, similar to functionality of "conv2(hcol, hrow, A)" Author: Igor Solovey

I only used it with a all-1's 3-D kernel on a volume image (150x200x200) and it works fine. The time decreased from 5s down to 1s (although I was using a MEX version of 3d convolution). Good job!

However, the trimarray part seems a little weird and does not work since n2s does not exist. Any help on that would be appreciated.

30 Dec 2010 Keypoint Extraction Extract image keypoints using most common algorithms. Author: Vincent Garcia

Great job!

I found that replacing imfilter(img,...) by imfilter(single(img),...) significantly speeds up the detection of keypoints. This is especially interesting with kp_log for which the time decreased from several minutes to 10 seconds in my case. This is due to the available Intel IPP library (as mentioned in the doc of imfilter).

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