Topic
Dynamic range
About: Dynamic range is a research topic. Over the lifetime, 7576 publications have been published within this topic receiving 101739 citations. The topic is also known as: DNR & DR.
Papers published on a yearly basis
Papers
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07 Nov 2009
TL;DR: The proposed stereoscopic high dynamic range imaging technique is able to record multiple exposures without any time delay, and thus suitable for high dynamicrange video synthesis.
Abstract: This paper presents a method for generating high dynamic range and disparity images by simultaneously capturing the high and low exposure images using a pair of cameras. The proposed stereoscopic high dynamic range imaging technique is able to record multiple exposures without any time delay, and thus suitable for high dynamic range video synthesis. We have demonstrated that it is possible to construct the camera response function using a pair of images with different amount of exposure. The intensities of the stereo images can then be normalized for correspondence matching. Experiments using the Middlebury stereo datasets are presented.
47 citations
Patent•
03 Apr 1992
TL;DR: In this article, an image signal processing device consisting of a logarithmic compression circuit, filtering circuit, filter characteristic setting circuit and dynamic range/gain control circuit is described.
Abstract: An image signal processing device includes a logarithmic compression circuit, filtering circuit, filtering characteristic setting circuit and dynamic range/gain control circuit. The logarithmic compression circuit subjects an input image signal containing a color signal to the logarithmic compression. The filtering circuit serves to filter the input image signal. The filtering characteristic setting circuit adaptively sets the band pass characteristic of the filtering circuit according to the feature of the input image signal. The dynamic range/gain control circuit controls the dynamic range and gain of the filtered input image signal.
47 citations
TL;DR: For the amorphous detector system, local contrast and temperature stability are demonstrated to be excellent while the transient response is sufficient for imaging applications.
Abstract: A locally autoadaptive image sensor LARS II (Lokal-AutoadaptiveR Sensor) with 368/spl times/256 pixels was designed and fabricated in thin film on ASIC (TFA) technology. Every pixel contains an automatic shutter, made of 17 transistors and two capacitors on an area of 40/spl times/38.3 /spl mu/m/sup 2/, that adapts the integration time to the local intensity. This allows the capture and processing of scenes with extremely high dynamic range. For the amorphous detector system, local contrast and temperature stability are demonstrated to be excellent while the transient response is sufficient for imaging applications. Sample images shown in this paper verify the total dynamic range of 120 dB.
47 citations
Patent•
16 Mar 2004TL;DR: In this article, a gain characteristic correctable dynamic range enhancement system (DRES) was proposed to extend the dynamic range of an imager with linearity corrections at predetermined trip points, subject to determined offset values.
Abstract: A gain characteristic correctable dynamic range enhancement system (DRES) receives input signals from an imager device connected to a correlated double sampling (CDS) circuit for receiving the video signal from the CCD imaging device. The dynamic range enhancement system includes a variable gain amplifier (VGA), and a limited bit-width analog-to-digital converter (ADC) which digitizes the analog signal received from the VGA. The output of the ADC is provided to an initial bit range position of a wider bit-width shifter connected to the output of the ADC. The DRES system correctably extends the dynamic range of the imager device, subject to offsets providing linearity corrections at predetermined trip points, subject to determined offset values, to ensure that there are no discontinuities in the system transfer function.
47 citations
TL;DR: In this paper, a bias-free optical phase demodulation using an optical delay line filter is proposed and a spur-free dynamic range of 114 dB/Hz/sup 2/3/ is measured at a frequency of 12.5 GHz using optical carrier suppression.
Abstract: Bias-free optical phase demodulation using an optical delay line filter is analyzed and experimentally demonstrated. A spur-free dynamic range of 114 dB/Hz/sup 2/3/ is measured at a frequency of 12.5 GHz using optical carrier suppression. The method is shown to have the same dynamic range, noise figure, and link gain compared to a Mach-Zehnder link over a limited bandwidth.
47 citations