EP 1537378 A1 20050608 - METHOD AND SYSTEM FOR SIZE CALIBRATION
Title (en)
METHOD AND SYSTEM FOR SIZE CALIBRATION
Title (de)
VERFAHERN UND SYSTEM ZUR GRÖSSENKALIBRATION
Title (fr)
PROCEDE ET SYSTEME D'ETALONNAGE DES DIMENSIONS
Publication
Application
Priority
- DE 10242628 A 20020913
- EP 0310013 W 20030909
Abstract (en)
[origin: WO2004025217A1] The invention concerns a method and a system for size calibration of an electronically generated image (8, 9) of a specimen that is generated by an optical instrument (1) having a downstream digital camera (3) operable in different reproduction modes. In order to enhance image analysis reliability and decrease access times, it is proposed that firstly, for a specified reproduction mode of the camera, a reference calibration value (21c, 21d) indicating the ratio of a specimen dimension to an image dimension be determined and be stored together with the specified reproduction mode (21b); and that for size calibration, a correction factor regarding the reproduction mode be derived by means of a comparison of the stored reproduction mode (21b) to the reproduction mode (16) of the camera (3) currently in use, and from that correction factor, together with the stored reference calibration value (21c, 21d), the current calibration value be calculated.
IPC 1-7
IPC 8 full level
G01B 9/04 (2006.01); G01B 11/00 (2006.01); G01B 11/02 (2006.01); G06T 7/00 (2006.01)
CPC (source: EP)
G01B 9/04 (2013.01); G01B 11/00 (2013.01)
Citation (search report)
See references of WO 2004025217A1
Designated contracting state (EPC)
DE GB
DOCDB simple family (publication)
WO 2004025217 A1 20040325; DE 10242628 A1 20040325; DE 10242628 B4 20040812; EP 1537378 A1 20050608; JP 2005538368 A 20051215
DOCDB simple family (application)
EP 0310013 W 20030909; DE 10242628 A 20020913; EP 03795001 A 20030909; JP 2004535466 A 20030909