Search results for key=LSS1997 : 1 match found.

Refereed full papers (journals, book chapters, international conferences)

1997

@article{LSS1997,
	vgclass =	{refpap},
	author =	{Thomas Lehmann and Abhijit Sovakar and Walter Schmiti
	and Rudolf Repges},
	title =	{A comparison of similarity measures for digital
	subtraction radiography},
	journal =	{Computers in Biology and Medicine},
	volume =	{27},
	number =	{2},
	pages =	{151--167},
	year =	{1997},
	abstract =	{Subtraction is useful in detecting small changes in
	sequentially acquired radiographs. Even if the imaging geometry is
	constant, radiographs must be registered after their digltization. To
	compare different algorithms for image registration and to register
	digital X-rays themselves, various similarity measures have been
	proposed. This study compares eight mathematical similarity standards
	using 172 radiographs acquired in different, but exactly known
	projection. Whenever the computation time is a critical factor, e.g.
	registering images using methods similar to correlation techniques, the
	entropy of the subtraction image's histogram function (EHDI) is found
	to be the best similarity standard. If not, e.g. comparative assessing
	different image registration techniques, the cross covariance
	coefficient (CCC) is appropriate.},
}