A ridgelet representation of semantic object using watershed segmentation
Mikio Hasegawa, S. Tajima · 2005
We propose an application of the ridgelet transform to semantic objects which are produced by the watershed segmentation. The ridgelet transform is effective in representing line singularities; therefore, it is a powerful tool for coding. Moreover, it has the advantageous property of rotating a block easily by shifting coefficients in ridgelet domain. Nevertheless, the rotating target is not a rectangular block but a real object. For that reason, we divide a picture into semantic objects using the watershed segmentation, and each object is converted by the ridgelet transform; then, we can rotate each object easily. Predictive coding with this method is attempted. Simulations show that referencing object with rotation is very effective in prediction.