We proposed to use a transmission tunable mask in front of complementary metaloxidesemiconductor (CMOS) or lens to achieve high-dynamic-range (HDR). The mask can control the light that goes into the CMOS pixel by pixel. We demonstrate the validation of such method through simulation. An experiment setup is also achieved by using monochromatic liquid-crystal display (LCD) screen. We demonstrate ...

In this paper, a high dynamic range (HDR) imaging method based on the stereo vision system is presented. The proposed method uses differently exposed low dynamic range (LDR) images captured from a stereo camera. The stereo LDR images are first converted to initial stereo HDR images using the inverse camera response function estimated from the LDR images. However, due to the limited dynamic rang...

There's a plenty of file formats designed for storing high dynamic range (HDR) images. But none of them provide satisfactory compression ratio and backward compatibility with existing file formats. In this paper we propose an approach to lossy compressing HDR data in a standard JPEG/JFIF file. An original HDR file is decomposed into a tone mapped version of it LDR (low dynamic range) 24bpp and ...

High Dynamic Range (HDR) images have been widely applied in daily applications. However, HDR image is special format, which need to pre-process known as tone mapping operators for display. Since the visual quality of HDR images are very sensitive to luminance value variations, conventional watermarking methods for low dynamic range (LDR) images are not suitable and may even cause catastrophic v...

Composition du jury Rapporteurs : Luc Brun Professeur, École Nationale Supérieure d’Ingénieurs de Caen Christine Solnon Mâıtre de Conférences HDR, Université Lyon 1 Examinateurs : Jean-Marc Ogier Professeur, Université de La Rochelle Nicole Vincent Professeur, Université Paris Descartes Ernest Valveny Associate Professor, Universitat Autònoma de Barcelona Invité : Bernard Maigret Directeur de r...

High dynamic range (HDR) displays that incorporate two optically-coupled image planes have recently been developed. The existence of such displays requires HDR image splitting algorithms that send appropriate signals to each plane to faithfully reproduce the appearance of the HDR input. In this paper we introduce a new appearance-based HDR image splitting algorithm that incorporates the iCAM06 ...

HDR Radiance Maps have being widely studied in the last years. In this work we recover HDR Radiance Maps from photographs, using only two shots of the same scene exposed diferently. We also recover film response curves to visualize HDR color images as if they were taken with the photographic film. All the operations used to reconstruct the HDR Radiance Map work on image histograms, the presence...

Jiangtao Kuang Rodney Heckaman Mark D. Fairchild (SID Member) Abstract — Current HDR display technology approaches the dynamic-range capabilities of the fully adapted human visual system. As such, this technology has potential for performing as a surrogate for real-world scenes in the perceptual evaluation of high-dynamic-range (HDR) image-reproduction algorithms that aim to map HDR scenes to t...

We investigate the stereo matching techniques for high dynamic range (HDR) image pairs. It is an emerging topic in computer vision and multimedia applications due to the availability of HDR image capture devices. The disparity computation will eventually take the stereo HDR input. In this work, three state-of-the-art stereo matching algorithms are modified and used to test the advantages of HDR...

Président du jury : François JULIEN Directeur de Recherches(HDR), IEF – Univ. Paris Sud Rapporteurs : Olivier GAUTHIER-LAFAYE Chargé de Recherches(HDR), LAASUniv. Paul Sabatier Dominique COQUILLAT Directeur de Recherches(HDR), L2C –Univ. Montpellier 2 Examinateurs : Robson FERREIRA Directeur de Recherches(HDR), LPA – ENS de Paris Bloch oscillations and Wannier Stark Ladder study in Semiconducto...