@article {, title = {Improving the calibration of image sensors based on iofbs, using differential gray-code space encoding}, journal = {Sensors}, volume = {12}, year = {2012}, month = {07/2012}, pages = {9006-9023}, publisher = {MDPI}, address = {Suiza}, issn = {1424-8220}, doi = {10.3390/s120709006}, author = {P.R. Fern{\'a}ndez and Jose L. Lazaro and Angel Cano and Alfredo Gardel and Ignacio Bravo and Carlos Andres Luna} }