Object description
Abstract
Objects are represented as a collection of pixels in an image. Thus, for purposes of recognition we need to describe the properties of groups of pixels. The description is often just a set of numbers – the object’s descriptors. As such, we should be able to recognise similar objects when they have similar descriptors. Descriptions should have invariant properties: to orientation, scale and position and also to affine and perspective changes. We present the characterisation of objects by two forms of descriptors: region and shape descriptors characterise an arrangement of pixels within the area and the arrangement of pixels in the perimeter or boundary, respectively. This region versus perimeter representation ...
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