The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 08, 1990
Filed:
Jan. 05, 1988
Peter W Stansfield, Hertfordshire, GB;
Alastair Reed, Bedfordshire, GB;
Crosfield Electronics Limited, London, GB;
Abstract
Apparatus for modifying part of an image represented digitally in the frequency domain comprises a first memory for storing a representation of the image digitally in the frequency domain as at least one first block of data locations containing frequency coefficient data. A second memory is provided for storing a representation of the image part in the frequency domain by second blocks of data locations containing frequency coefficient data, the first and second blocks representing, after conversion to the spatial domain, spatially shifted versions of the image part relative to a fixed spatial co-ordinate system. A suitably programmed computer applies a predetermined shift function defined in the frequency domain to the (or each) first block of data stored in the first memory to generate the (or each) second block, and stores the resultant second blocks of data in the second memory.