Differential binary encoding method for calibrating image sensors based on IOFBs

Sensors (Basel). 2012;12(4):4133-55. doi: 10.3390/s120404133. Epub 2012 Mar 27.

Abstract

Image transmission using incoherent optical fiber bundles (IOFBs) requires prior calibration to obtain the spatial in-out fiber correspondence necessary to reconstruct the image captured by the pseudo-sensor. This information is recorded in a Look-Up Table called the Reconstruction Table (RT), used later for reordering the fiber positions and reconstructing the original image. This paper presents a very fast method based on image-scanning using spaces encoded by a weighted binary code to obtain the in-out correspondence. The results demonstrate that this technique yields a remarkable reduction in processing time and the image reconstruction quality is very good compared to previous techniques based on spot or line scanning, for example.

Keywords: image sensor; image transmission; optical fiber sensors; sensor calibration.