We present two novel mobile reflectometry approaches for acquiring detailed spatially varying isotropic surface
reflectance and mesostructure of a planar material sample using commodity mobile devices. The first approach
relies on the integrated camera and flash pair present on typical mobile devices to support free-form handheld
acquisition of spatially varying rough specular material samples. The second approach, suited for highly specular
samples, uses the LCD panel to illuminate the sample with polarized second order gradient illumination. To
address the limited overlap of the front facing camera’s view and the LCD illumination (and thus limited sample
size), we propose a novel appearance transfer method that combines controlled reflectance measurement of a small
exemplar section with uncontrolled reflectance measurements of the full sample under natural lighting. Finally,
we introduce a novel surface detail enhancement method that adds fine scale surface mesostructure from close-up
observations under uncontrolled natural lighting. We demonstrate the accuracy and versatility of the proposed
mobile reflectometry methods on a wide variety of spatially varying materials.