Topic
High-dynamic-range imaging
About: High-dynamic-range imaging is a research topic. Over the lifetime, 766 publications have been published within this topic receiving 22577 citations.
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03 Jun 2013
TL;DR: An FPGA-based smart camera prototype that can produce a high dynamic range live video colour stream from three successive sensor acquisitions and consists of a hardware architecture with different algorithms : a multiple exposure control, a memory management unit, the HDR creating, and the tone mapping.
Abstract: A camera or a video camera is able to capture only a part of a high dynamic range scene information. The same scene can be almost totally perceived by the human visual system. This is true especially for real scenes where the difference in light intensity between the dark areas and bright areas is high. The imaging technique which can overcome this problem is called HDR (High Dynamic Range). It produces images from a set of multiple LDR images (Low Dynamic Range), captured with different exposure times. This technique appears as one of the most appropriate and a cheap solution to enhance the dynamic range of captured environments. We developed an FPGA-based smart camera prototype that can produce a high dynamic range live video colour stream from three successive sensor acquisitions. Our hardware platform is build around a standard LDR CMOS sensor and a Virtex 6 FPGA board. Our approach consists of a hardware architecture with different algorithms : a multiple exposure control, a memory management unit, the HDR creating, and the tone mapping. Our video camera enables a real-time video at 60 frames per second for a full sensor resolution of 1; 280 1; 024 pixels.
1 citations
TL;DR: This work proposes an extended multiscale algorithm based on compression of the dynamic range in the gradient domain that shows a significantly improved visualisation of astronomical images compared to the standard gradient domain compression, as well as more robustness to noise and better artefact suppression.
Abstract: Visualisation of high dynamic range images requires compression of the data to be properly displayed on media with more limited dynamic ranges. Astronomical images pose a difficult challenge for dy...
1 citations
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01 Jul 2018
TL;DR: Rehan’s Zone System provides a systematic, adaptive workflow that makes use of these techniques to maximise tonal latitude, extend creative control, and, provide a greater opportunity to capture the decisive moment using faster shutter speeds.
Abstract: Contemporary digital photographic tools, technologies and techniques such as high dynamic range (HDR) photography, focus stacking and digitally-stitched panoramas have enabled photographers to have an unprecedented level of creative control over the final image. Rehan’s Zone System provides a systematic, adaptive workflow that makes use of these techniques to maximise tonal latitude, extend creative control, and, provide a greater opportunity to capture the decisive moment using faster shutter speeds.
1 citations
TL;DR: In this paper, a dual digital micromirror devices (DMDs) camera for high dynamic range imaging is presented, which consists of two DMDs, an objective imaging lens, and a reimaging lens.
1 citations
Patent•
25 Jul 2011TL;DR: In this article, an imaging device includes an imaging element, a RAM, an adding synthesizing unit, and a high dynamic range synthesizing means, where the RAM temporarily stores plural pieces of image data that have been consecutively captured by the imaging element.
Abstract: An imaging device includes an imaging element, a RAM, an adding synthesizing unit, and a high dynamic range synthesizing means. The imaging element captures an image of a subject and generates image data. The RAM temporarily stores plural pieces of image data that have been consecutively captured by the imaging element. The adding synthesizing means adds and synthesizes the plural pieces of image data stored in the RAM to generate synthesized image data. The high dynamic range synthesizing means synthesizes one of the plural pieces of image data with the synthesized image data to generate high dynamic range image data and outputs the generated high dynamic range image data.
1 citations