Determining the Radiometric Response Function from a Single Grayscale Image

A method is presented for computing the radiometric response function of a camera from a single grayscale image. While most previous techniques require a set of registered images with different exposures to obtain response data, our approach capitalizes on a statistical feature of graylevel histograms at edge regions to gain information for radiometric calibration. Appropriate edge regions are automatically determined by our technique, and a prior model of radiometric response functions is employed to deal with incomplete data. With this single-image method, radiometric calibration becomes possible to perform in many instances where the camera is unknown.

• Type: Conference
• Year: 2005
• Where: CVPR
• Authors: Stephen Lin, Lei Zhang
• Keywords: Appropriate Edge Regions, Computer Vision, CVPR 2005, Radiometric Calibration, Radiometric Response Function, Radiometric Response Functions, Single Grayscale Image