IMAGE RESAMPLING WITH GEOMETRIC TRANSFORMATION

摘要

An approach to resampling incorporates geometric transformation into the resampling process. A specification of a geometric transformation is accepted for application to the first image to produce a second image. A two-dimensional filter for application to the first image is then determined using the specification of the geometric transformation. Data characterizing relationships between pixel locations in the second image and pixel locations in the first image is computed. Pixel values of a second image are then computed by applying the two-dimensional filter to the first image, including for each of a plurality of pixels locations of the second image, computing a value for the second image at said pixel location by applying the second filter according to the data characterizing the relationships between pixel locations. The approach can be performed in two phases, with the computing of the data characterizing the relationships between the pixel locations being completed prior to the computing of the pixel values of the second image.

主权项

1. A method for processing a first image comprising:
accepting a specification of a geometric transformation for application to the first image to produce a second image; determining a two-dimensional filter for application to the first image using the specification of the geometric transformation; computing, using a processor, data characterizing relationships between pixel locations in the second image and pixel locations in the first image, wherein the data includes, for a pixel location in the second image, an identifier indicating a position of the two-dimensional filter with respect to the first image; storing the data characterizing relationships between pixel locations in a data structure; and computing, using a processor, pixel values of the second image by applying the two-dimensional filter to the first image, including for each of a plurality of pixels locations of the second image, computing a pixel value for the second image at said pixel location by applying the two-dimensional filter according to the data characterizing the relationships between pixel locations.