HDR Image Acquisition Using Integrated Mobile Device Camera

Abstract

This work is focused on capturing the radiance map using a common mobile device. More specifically, we focus on a reconstruction of spherical panoramas sky-dome in high dynamic range (HDR) quality and save it to a usable data format. We have attached the cheap fish-eye lens to capture spherical panoramas and the proposed calibration technique, implement selected tone mapping operator (TMO) allowing satisfactory display of HDR images on the mobile device. To capture the HDR image we utilize a camera embedded in smart-phone devices. Built-in cameras on mobile devices do not generally capture the HDR image. In our work, we describe an algorithm for capturing an HDR image on the Android platform. Using the optimization method we are able to construct a camera response curve in order to reconstruct the HDR image. Later the captured panoramas containing HDR data can be used to produce radiance sphere-maps useful in realistic image synthesis for illuminating the objects in the 3D scene.