标题：Normal Map Acquisition of Nearly Flat Objects Using a Flatbed Scanner
作者：Pan, Rongjiang; Skala, Vaclav
作者机构：[Pan, Rongjiang] Shandong Univ, Sch Comp Sci & Technol, Jinan 250100, Peoples R China.; [Skala, Vaclav] Univ West Bohemia, Fac Appl Sci, Plzen, Czec 更多
会议名称：International Conference on Virtual Reality and Visualization (ICVRV)
会议日期：SEP 14-15, 2013
来源：2013 INTERNATIONAL CONFERENCE ON VIRTUAL REALITY AND VISUALIZATION (ICVRV 2013)
关键词：Normal map reconstruction; Flatbed scanner; Checkerboard; Subpixel; corners
摘要：We propose a new efficient technique for acquiring normal maps of nearly flat objects using a flatbed scanner. The technique requires no hardware modification or dedicated calibration. Our setup consists of a conventional flatbed scanner and a clamp on which a planar checkerboard is glued. We take four scans of the object manually rotated by roughly 90 degrees. The scans are then registered by subpixel checkerboard corners. Detailed normal map of the scanned surface is obtained by solving a linear least squares problem.