Single-shot High Dynamic Range Imaging Using Coded Electronic Shutter

Hojin Cho, Seon Joo Kim, Seungyong Lee

Abstract:

Typical high dynamic range (HDR) imaging approaches based on multiple images have difficulties in handling
moving objects and camera shakes, suffering from the ghosting effect and the loss of sharpness in the output HDR
image. While there exist a variety of solutions for resolving such limitations, most of the existing algorithms are
susceptible to complex motions, saturation, and occlusions. In this paper, we propose an HDR imaging approach
using the coded electronic shutter which can capture a scene with row-wise varying exposures in a single image.
Our approach enables a direct extension of the dynamic range of the captured image without using multiple
images, by photometrically calibrating rows with different exposures. Due to the concurrent capture of multiple
exposures, misalignments of moving objects are naturally avoided with significant reduction in the ghosting effect.
To handle the issues with under-/over-exposure, noise, and blurs, we present a coherent HDR imaging process
where the problems are resolved one by one at each step. Experimental results with real photographs, captured
using a coded electronic shutter, demonstrate that our method produces a high quality HDR images without the
ghosting and blur artifacts.