Systems and methods for imaging fine art paintings
US11025800B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 12, 2019 |
| Grant date | Jun 1, 2021 |
| Priority date | — |
| Expiry date | Jun 25, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/6008
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Color values as a function of position within a painting may be determined by acquiring a plurality of sets of images of the painting. Each set of images may correspond to a different region within the painting. Each image in a set of images may be acquired using a different lighting condition. An optical system comprising a telecentric lens may be used to acquire each image. Within a set of images, corresponding lightness values of pixels may be compared. Lightness values varying from other corresponding lightness values more than a threshold amount may be eliminated. The non-eliminated lightness values for a pixel may be used to generate a processed value for the pixel. The processed values for each pixel representing an imaged region may be combined into a single image. Eliminating lightness values may remove specular highlights and/or shadows. Each of the single images corresponding to each set of images may be registered together to generate a color map image of the painting. The generated color map image may be used to correct color data collected by laser scanning the painting. A 3D printer may, for example, use the corrected laser color data in combination with an elevation…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.