…combinations of the given properties are equally valid and should be considered as well. If there are n binary properties then the difference between any two objects that are not…
Prior knowledge
Monday, September 10th, 2012 at
00:00
The recognition task
Monday, October 29th, 2012 at
00:00
…he is given exactly the same observation, e.g. the same picture. Only for complicated and ill defined patterns like lung x-ray images or microscope pictures of tissues an experienced observer…
Statistical pattern recognition
Thursday, September 13th, 2012 at
00:00
…accept that knowledge can be expressed in bits of information. This implies always an uncertainty. Prior knowledge however usually comes as certain. The expert cannot estimate how convinced he is…
Representation and generalization
Friday, November 2nd, 2012 at
00:00
…they come from the same production process or when they are twins, they differ. It may take some inspection before we have found the difference. Nevertheless, in spite of the…
Regularization and invariants
Thursday, March 20th, 2014 at
15:21
…mean (or are shifted to the origin before). This matrix needs to be inverted in the computation of a classifier. It will, however, be singular (having rank 0) in case…
Non-Euclidean and non-metric dissimilarities
Monday, January 14th, 2013 at
00:00
…common, as often, by definition dissimilarity measures are metric: the dissimilarity between two objects is the smallest difference that can be found according to some optimization procedure. The criteria for…
My classifier scores 50% error. How bad is that?
Friday, April 3rd, 2015 at
17:27
…probable class. However, in case of multi-class problems much larger errors may be found. How good is a 50% error for a multi-class classifier? Can we compare it in one…
What is pattern recognition?
Monday, September 3rd, 2012 at
00:00
…basis of any science, in particular, the natural sciences. The question how we do this, how we come from observations to memory and to generalization is thereby the basic scientific…
The ten Aristotelian categories, features and dissimilarities
Thursday, August 14th, 2014 at
16:49
…The founding fathers of philosophy, Plato and Aristotle, created two competing foundations for knowledge: the ideas and the categories. According to Plato reality is constituted by the non-materialistic ideas:…
Dissimilarity measures
Monday, December 31st, 2012 at
00:00
…distance measures. There are some additional properties that may be helpful. Dissimilarities versus distances It is very common to define dissimilarity measures that are non-negative. It is however not essential….
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