ISET - High Dynamic Range Spectral (HDRS) Image Database
The ISET package includes images from our high dynamic range spectral (HDRS) image database. These images are complete spectral approximations the light radiance field. The full HDRS image database includes a collection of additional images and customized software tools. This document describes the methodology we used to acquire the data and estimate the spectral radiance for the images in the HDRS database. To create spectral radiance (photons/sec/nm/m2) HDRS images, the user combines linear sensor measurements from a calibrated camera with linear models of surfaces and illuminants. These data and models are combined to form an estimate of the multispectral image data.
The scene data were acquired with a 12-bit CCD 6 Megapixel camera. The process begins by acquiring eighteen different images, including six exposure durations and three color filter conditions. The data from these images are combined to estimate the scene radiance. The multiple filters expand the spectral dimension of the scene data; the multiple exposures expand the dynamic range of the scene data.
The high quality database of spectral images serves as a source of input data to the virtual camera simulator. High dynamic range spectral data are essential in order to simulate accurately the effects of optics and sensors. Using a very high quality initial data set makes it possible to assess the properties of many other sensors whose dynamic range are limited compared to the HDRS database images.
Get pdf ISET - High Dynamic Range Spectral (HDRS) Image Database
