IMAGE PROCESSING DEVICE FOR DETECTING CONTRAST TRANSITION, PARTICULARLY IN A MACHINE TOOL

• US 20110122243A1
• Filed: 03/16/2009
• Published: 05/26/2011
• Est. Priority Date: 05/14/2008
• Status: Abandoned Application

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Niehsen, Wolfgang, Platzer, Joachim, Koeder, Thilo
• Application Number:
  US12/992,212
• Publication Number:
  US 20110122243A1
• Time in Patent Office: Days
• US Class Current: 348/82
• CPC Class Codes: G06T 7/13 Edge detection

Abstract

An image processing device for detecting contrast transition comprises a digital imaging unit as an optical sensor unit, the digital sensor signals of which are processed in an evaluation unit.

Claims

1. Image processing device for detecting contrast transition, in particular in a machine tool, with an optical sensor unit, whose sensor signals can be supplied to an evaluation unit, in which he signal changes for the detection of a contrast transition can be determined, wherein the optical sensor unit is implemented as a digital image capture unit, whose digital sensor signals are processed in the evaluation unit.

2. The image processing device according to claim 1 in that wherein the digital image processing device is a digital camera.

3. The image processing device according to claim 1 wherein the evaluation unit comprises a digital analog converter in which the digital sensor signals can be converted into analogous signals.

4. The image processing device according to claim 3 wherein the evaluation unit comprises a differentiator that is downstream after the digital analog converter.

5. The image processing device according to claim 4 wherein the differentiator is assigned to a comparator, with which a comparison of the signal that has been determined in the differentiator with a reference value can be carried out.

6. The image processing device according to claim 1, wherein the evaluation unit comprises a logic gate, in which the digital sensor signals have to be evaluated.

7. The image processing device according to claim 1, wherein the evaluation unit comprises a microcontroller, in which the digital sensor signals have to be evaluated.

8. The image processing device according to claim 1, wherein the evaluation unit comprises an edge filter, in which the digital sensor signals have to be evaluated.

9. The image processing device according to claim 1, wherein low-order bits are masked in an adjustable way in the evaluation unit that is assigned to the digital sensor signals.

10. Procedure for operating the image processing device according to claim 1, wherein the detection of the contrast processing transition is used for detecting a target track.