We propose a novel edge detector in the presence of Gaussian noise with the use of proximal support vector machine (PSVM). The edges of a noisy image are detected using a two-stage architecture: smoothing of image is first performed using regularized anisotropic diffusion, followed by the classification using PSVM, termed as regularized anisotropic diffusion-based PSVM (RAD-PSVM) method. In this process, a feature vector is formed for a pixel using the denoised coefficient’s class and the local orientations to detect edges in (...) all possible directions in images. From the experiments, conducted on both synthetic and benchmark images, it is observed that our RAD-PSVM approach outperforms the other state-of-the-art edge detection approaches, both qualitatively and quantitatively. (shrink)

The culture of science is deeply influenced and conditioned by the socio-political realities of both time and locale. Pre-colonial India, for example, was no tabula rasa. It had a vigorous tradition in at least the realms of mathematics, astronomy and medicine. But gradual colonization made a big dent. It brought forth a massive cultural collision which influenced profoundly the cognitive and material existence of both the colonizer and the colonized.