scikits-image/scikits-image — pull request #223 by jni (2012-07-20 20:50:04+00:00)
Title: Concatenate image collection

In a few contexts (stacks of microscopy images, video frames) it is desirable to operate on a `numpy.ndarray` containing *all* images in a collection. The new `skimage.io.ImageCollection.concatenate` function converts a collection to such an `ndarray`.

This operation only makes sense when all images have the same shape, so the function raises a `ValueError` when this is not the case (and np.concatenate fails with such a ValueError).