Patent Number: 6,295,322

Title: Processing apparatus for synthetically extending the bandwidth of a spatially-sampled video image

Abstract: An input data stream of pixel values, representing an original video image having predetermined horizontal and vertical resolutions that has been spatially sampled at a first spatial sampling frequency, is upsampled and interpolated to derive an output data stream of interpolated pixel values at a second spatial sampling frequency that represents an oversampled video image that has been enlarged in size with respect to the original video image but has the same full bandwidth as the original video image. The pixel values of the input data stream and the interpolated pixel values of this output data stream are both employed to synthetically derive the interpolated pixel values of a correction-waveform data stream that defines spatial frequencies that are higher in frequency than the highest frequency in the full bandwidth of the original video image. A data stream representing an extended-full-bandwidth enlarged video image is derived by summing corresponding interpolated pixel values of the correction-waveform data stream and the data stream representing the oversampled enlarged video image. In this manner, the sharpness of the edge information of the original video image is preserved in the extended-full-bandwidth enlarged video image. Optionally, the data stream representing the extended-full-bandwidth enlarged video image may be further processed to synthetically add a drop shadow effect to a displayed enlarged video image, which provides perspective that enhances the appearance of the displayed enlarged video image.

Inventors: Arbeiter; James Henry (Hopewell, NJ), Bessler; Roger Frank (Lawrenceville, NJ)

Assignee: North Shore Laboratories, Inc.

International Classification: G09G 5/00 (20060101); G06T 3/40 (20060101); H04N 5/14 (20060101); H04N 5/208 (20060101); H04N 5/445 (20060101); H04N 005/14 (); G09G 005/00 ()

Expiration Date: 09/25/2018