This paper introduces a new approach for optimum auto exposure (AE) based on the high-dynamic-range histogram (HDH) of a scene. The exposure control is optimal in terms of recorded information of the scene. The advantages over AE based on mean values of images will be shown as well as a proof of concept implementation and results. Futhermore possible extensions to this approach are discussed. T...

Images taken by typical digital cameras with fixed exposure often suffer from a lack of details in the underexposed and overexposed regions. Fusing multi-exposed images is particularly useful for improving this situation. This paper proposes a weighted-sum-based multi-exposure image fusion method that is fast enough to be implemented in digital cameras. The proposed method attempts to improve t...

Recently, we have proposed a new image device called gigavision camera whose most important characteristic is that pixels have binary response. The response function of a gigavision sensor is non-linear and similar to a logarithmic function, which makes the camera suitable for high dynamic range imaging. One important parameter in the gigavision camera is the threshold for generating binary pix...

This work deals with the problem of automatically choosing the correct exposure (or integration) time for timeof-flight depth image capturing. We apply methods known from high dynamic range imaging to combine depth images taken with differing integration times in order to produce high quality depth maps. We evaluate the quality of these depth maps by comparing the performance in reconstruction ...

Due to technical limitations, common display devices can only reproduce images having a low range of intensity values (dynamic range). As a consequence, the dynamic range of images encoding real world scenes, which is large, has to be compressed in order for them to be reproduced on a common display, and this technique is called tone mapping. Because there is no ground truth to compare with, ev...

Introduction: As the number and complexity of partially sampled dynamic imaging methods continues to increase, understanding how these methods relate and perform becomes increasingly difficult. Modulation transfer functions (MTF) have been used extensively in medical imaging in general, and X-ray imaging in particular, to evaluate the performance of imaging systems. An MTF graphically displays ...

Neutron imaging finds applications in many branches of science and industry such as in nondestructive testing, material science etc. Conventional imaging of neutrons has been carried out mostly using analogue technology such as screen film imaging. Making transition from analogue to digital could bring several advantages such as fast image acquisition and display, implementation of image proces...

To avoid motion artefacts when merging multiple exposures into a high dynamic range image, a number of HDR deghosting algorithms have been proposed. However, these algorithms do not work equally well on all types of scenes, and some may even introduce additional artefacts. As the number of proposed deghosting methods is increasing rapidly, there is an immediate need to evaluate them and compare...

Related Concepts – Overexposure – Radiometric response functions – Full well capacity – Blooming – Dynamic range – High dynamic range imaging Definition In imaging, saturation is a type of distortion where the recorded image is limited to some maximum value, interfering with the measurement of bright regions of the scene.