Intensity Discontinuity Location to SubPixel Precision
نویسندگان
چکیده
Lateral inhibition processing of an image yields subpixel precision in the location of intensity discontinuity edges in a digitized image. The method is illustrated using a 512 x 512 x 8 bit image.
منابع مشابه
FFT-based Subpixel MRI Image Registration and Its Application in FMRI
Introduction There are many methods[l] to register various images from different modalities, or the same anatomical images acquired at different times. A technique for 2D/3D subpixel MRI image registration is proposed here for 2Di3D MRI data of the same location acquired at different t imes with the same scanning parameters. Because these image data contain a similar intensity distribution, int...
متن کاملMorphological Corner Detection. Application to Camera Calibration
In this paper we study the application of the Affine Morphological Scale Space (AMSS) to corner detection with subpixel precision. Corner detection techniques are in general very sensitive to noise, so some kind of filtering is usually needed to remove noise before estimating the corner location, however, the filtering procedure changes the location of the corner, so the filtering introduce err...
متن کاملA Model Based Edge Location with Subpixel Precision
Estimation of edge features in an image (sub-pixel position, direction, curvature and change in intensity at both sides of the edge) starting from the calculus of the gradient vector in each pixel is not exact, even in ideal images. In this paper we present a new edge detector based on an edge and adquisition model that does not assume continuity in the image values. Edge features are obtained ...
متن کاملImage analysis with rapid and accurate two-dimensional Gaussian fitting.
A computationally rapid image analysis method, weighted overdetermined regression, is presented for two-dimensional (2D) Gaussian fitting of particle location with subpixel resolution from a pixelized image of light intensity. Compared to least-squares Gaussian iterative fitting, which is most exact but prohibitively slow for large data sets, the precision of this new method is equivalent when ...
متن کاملSubpixel-Precise Extraction of Watersheds
An approach to extract watersheds and watercourses, as well as their corresponding valleys and hills, from images with subpixel precision is proposed. The critical points of the terrain are essential as the starting points for the construction of these separatrices. They are extracted efficiently with subpixel precision using an approach based on derivatives of Gaussian filters. The separatrice...
متن کامل