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Improving performance of morphological reconstruction
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Morphological reconstruction may be implemented in a number of different ways. ITK has an iterative method and a non iterative method. This article compares the performance of another non iterative method and finds a significant improvement.

Parallel algorithms for erosion and dilation of label images.
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It is sometimes useful to be able to apply binary morphological operations, such as erosions and dilations, to labelled images in a fashion that preserves the labels. This article introduces a specialised class implementing parallel methods described in beare [...]

Optimization of connected component labelling
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The report details some modifications made to the ITK {em ConnectedComponentImageFilter} in an attempt to improve performance. Some interesting observations were made during this process. A new filter using a different algorithm to perform the [...]

Grayscale morphological attribute operations
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Morphological area attribute openings and closingscite{Cheng92,Vincent93a} are connected set operations that are able to remove parts of an image that meet certain criteria without changing the rest of the image. This article describes a number of classes [...]

Image mask adaptor for pixel order independent filters
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It is sometimes useful to apply a filter to a region defined by a mask. This article introduces a simple ``mask adaptor'' filter that allows this type of operation to be tested easily. It is applicable to filters that do not need any pixel location [...]

Some extra image logical operations
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Logic operations such as $I > J$, where I and J are images are useful when generating masks. This submission includes $==$, $>$, $>=$, $<$ and $<=$ filters based on the existing logic filters. This is a very minor submission - there may already be easy [...]

ImageLinearIterator - WithIndex removed
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ITK includes a number of iterators including the {em itkImageLinearConstIteratorWithIndex} and {em itkImageLinearIteratorWithIndex} that support visiting voxels along lines parallel to the image axes. This is particularly useful for separable filters. This [...]

Including TIFF tags in the MetaDataDictionary
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Tiff images are widely used and domain and instrument specific information is often included in some tags. There isn't any standard way of making use of this information in ITK at present. This article introduces some minor additions to the ITK tiff reader to [...]

Efficient implementation of kernel filtering
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Kernel based filtering is one of the fundamental tools of image analysis and processing. A number of approaches have been developed over the years that allow efficient implementation of such filters even when the kernel size is large. This article reviews [...]

Finding regional extrema - methods and performance
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Finding regional extrema of images is an important step in a number of morphological algorithms, such as some versions of the watershed transformfootnote{This work started because we were trying to compare different watershed algorithms}. Regional extrema [...]


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