Localization of a valid area of a blood smear

US8538122B2 · kind B2 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Timo Schlarb · Bad Sobernheim, DE
• Stephan Rupp · Forchheim, DE
• Thorsten Zerfass · Nuremberg, DE

Key dates

• Filing date: Jan 6, 2012
• Grant date: Sep 17, 2013
• Expiry date: Apr 15, 2032

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T2207/30024
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Automated localization of a valid area of a blood smear and, thus, localization requiring less effort and being more objective is enabled in that a picture of the blood smear pixels are classified at least into first pixels, which represent blood cells, and second pixels, which do not represent the blood cells, and the valid area is then found on the basis of a local frequency of pixel clusters of at least Amin first pixels, Amin being a minimum threshold for a number of first pixels of a pixel cluster, and a local average size of the pixel clusters for laterally distributed areas of the blood smear.