IPUMS

Read our latest blog post from IHGIS! Despite enormous strides in accuracy, OCR still struggles with distinguishing uncertain numerical digits. To address this gap, IHGIS developed an R package that identifies logical relationships in tables, determines where cells don’t add up as expected, and replaces with the correct value. https://bit.ly/3PHJY0K

Does 1 + 2 = 8? Automating QA/QC for Tabular Data – Use It for Good Does 1 + 2 = 8? Automating QA/QC for Tabular Data May 21, 2026May 21, 2026 by mpcblog By Tracy Kugler and Tsu Zhu The problem with OCR and numbers To extract data tables from census reports only available as print documents, IPUMS IHGIS uses optical character recognition (OCR) software to automate t...