Messen mit Subpixel‐Genauigkeit: Legende und Wirklichkeit

Abstract

Die 2‐D‐Messtechnik mit elektronischen Bildaufnehmern hat sich zu einer Schlüsseltechnologie der Automatisierung entwickelt. Dabei hat die Frage nach der erreichbaren Genauigkeit oberste Priorität. Sie entscheidet über die Wahl der Kamera, der Abbildungsoptik und der Beleuchtung.

High resolution displacement detection by speckle pattern analysis : accuracy limits in linear displacement speckle metrology

“…Assuming a linear behavior we see that the maximum permitted deformation has to be smaller than s = 1/25, a twenty-fifths of a pixel pitch. Such deformations are at the limit what could be recorded if interpolation between pixels is considered [16].…”

‘Kings among their subjects’? Ernst Thälmann, Harry Pollitt and the Leadership Cult as Stalinization

“…34 Significantly, Thälmann's adhesion to the SPD, in May 1903, predated by almost a year his enrolment in the appropriate trade union. 35 Thälmann later attributed this to a theoretical bent and streak of idealism prevailing over the materialist motivations of the trade unionist. He also claimed to have spurned employment as a union official out of commitment to the interests of rank-andfile workers.…”