Computer Vision

An optimized image segmentation algorithm

In computer vision, semantically accurate segmentation of an object is considered to be a critical problem. The different looking fragments of the same object impose the main challenge of producing a good segmentation. This leads to consider the high-level semantics of an image as well as the low-level visual features which require computationally intensive operations. This demands to optimize the computations as much as possible in order to reduce both computational and communication complexity. This paper proposes a framework which can be used to perform segmentation for a particular object by incorporating optimization in subsequent steps. The algorithm proposes an optimized K-means algorithm for image segmentation followed by balance calculations in multiple instance learning and topological relations with relative positions to identify OOI regions. Finally, a bayesian network is incorporated to contain the learned information about the model of the OOI. The preliminary experimental results suggest a significant drop in the complexity.

Incorporating shape into spatially-aware adaptive object segmentation algorithm

Semantically accurate segmentation of a particular Object Of Interest (OOI) in an image is an important but challenging step in computer vision tasks. Our recently proposed object-specific segmentation algorithm learns a model of the OOI which includes information on both the visual appearance of and the spatial relationships among the OOI components. However, its performance heavily depends on the assumption that the visual appearance variability among OOI instances is low. We present an extension to our algorithm that relaxes this assumption by incorporating shape information into the OOI model. Experimental results and an ANOVA-based statistical test confirm that the incorporation of shape has a highly significant positive effect on segmentation performance.