Method and apparatus for changing or mapping video or digital im

Details Method and apparatus for changing or mapping video or digital im Method and apparatus for changing or mapping video or digital im

1997-03-21

2000-01-25

Rogers, Scott

Image analysis

Image enhancement or restoration

Image filter

382279, 382298, 382300, 382305, 708300, 708420, 708290, G06T 340, G06F 1700

Patent

active

06018597&

ABSTRACT:
A method and apparatus for resizing digital or stored images initially retrieves a one-dimensional sample of the image, such as a line of pixels. A final image size D is determined so that the absolute value of the original sample size M-2.sup.N *D is a minimum, and where N is an integer greater than or equal to 0. The discrete series of pixels in the line are then converted to a continuous function under a cubic convolution interpolation technique. From the continuous function, intermediate pixel values are determined. Pyramid filtering is employed to filter the intermediate pixel values to a final series of pixel values D. The routine is performed along the opposite dimension so as to alter the size of a two-dimensional stored image.

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