Method and device for generating a super-resolution version of a low resolution input data structure

US9245326B2 · kind B2 · utility

Assignee

• Thomson Licensing · FR

Inventors

• Jordi Salvador · Hamburg, DE
• Axel Kochale · Springe, DE
• Malte Borsum · Hannover, DE

Key dates

• Filing date: Jan 11, 2013
• Grant date: Jan 26, 2016
• Expiry date: Jan 11, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T5/73
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

The invention relates to the improvement of the resolution of regularly sampled multi-dimensional signals, where a single low-resolution signal is available. These methods are generically referred to as example-based super-resolution or single-image super-resolution. The method for super-resolving a single image comprises three stages. First, an interpolation-based up-scaling of the input image is performed, followed by an equivalent low-pass filtering operation on the low-resolution image. The second stage comprises a search for low-frequency matches between an inspected patch in the high-resolution image and patches in a local neighborhood in the low-resolution low-frequency image, including partly overlapping patches, and accumulating the high-frequency contribution obtained from the low-resolution image. The third stage comprises adding the contributions of the low-frequency band of the high-resolution image and the extrapolated high-frequency band.