Canny Algorithm: A New Estimator for Primordial Non-Gaussianities

We utilize the Canny edge detection algorithm as an estimator for primordial non-Gaussianities. In preliminary tests on simulated sky patches with a window size of 57 degrees and multipole moments \(l\) up to 1024, we find a \(3\sigma\) distinction between maps with local non-Gaussianity \(f_{NL}=350\) (or \(f_{NL}=-700\)) and Gaussian maps. We present evidence that high resolution CMB studies will strongly enhance the sensitivity of the Canny algorithm to non-Gaussianity, making it a promising technique to estimate primordial non-Gaussianity.