Journal ArticleDOI
A High Dynamic Range CMOS Image Sensor for Scientific Imaging Applications
Jian Guo,Sameer Sonkusale +1 more
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TLDR
A novel feature of fine-tuning the overall dynamic range and contrast of the output image is achieved using this readout method, enabling a hybrid combination of linear and logarithmic pixel outputs in the same image frame without introducing complicated post-signal processing.Abstract:
This paper presents a high dynamic range CMOS image sensor that utilizes a combined linear-logarithmic readout scheme with built-in linear-logarithmic switching point detection for scientific imaging applications. The proposed readout architecture adjusts each individual pixel to operate in either linear or logarithmic readout mode according to the input illumination level. This realizes direct high-throughput image reconstruction enabling a hybrid combination of linear and logarithmic pixel outputs in the same image frame without introducing complicated post-signal processing. A novel feature of fine-tuning the overall dynamic range and contrast of the output image is also achieved using this readout method. An image sensor chip consisting of a 16times16 7-T pixel array with n-well/p-sub photodiodes and the proposed readout architecture has been implemented in 0.5 mum CMOS technology. The sensor chip has been evaluated through both electrical and optical characterizations, demonstrating an overall dynamic range of 121 dB. As a proof of concept, scientific imaging results on clusters of nano particles (CoFe2O4) and optical fiber sensor are presented and discussed.read more
Citations
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Proceedings ArticleDOI
Recent advances in high dynamic range imaging technology
TL;DR: The state-of-the-art studies and the trends of the HDR imaging are reviewed, in terms of the following three points: HDR imaging sensor and HDR image generation techniques as image acquisition technologies, encode method of HDR images for efficient transmission and storage, and human visual system issues associated with reproduction of HDR image.
Journal ArticleDOI
High dynamic range video reconstruction from a stereo camera setup
TL;DR: A framework is presented that utilizes two cameras to realize a spatial exposure bracketing, for which the different exposures are distributed among the cameras, and which enables the use of more complex camera setups with different sensors and provides robust camera responses.
Journal ArticleDOI
A Linear-Logarithmic CMOS Image Sensor With Pixel-FPN Reduction and Tunable Response Curve
TL;DR: In this article, a high dynamic range (DR) linear-logarithmic (Lin-Log) CMOS image sensor pixel with threshold voltage cancellation technique for pixel fixed pattern noise (PFPN) reduction was presented.
Journal ArticleDOI
A novel readout integrated circuit with a dual-mode design for single- and dual-band infrared focal plane array
TL;DR: The design uses a capacitive transimpedance amplifier with a single-stage amplifier and a switch mode, which has the advantages of a simple structure and a small pixel area and the choice of different sensing modules.
Journal ArticleDOI
Data Compression for Image Sensor Arrays Using a 15-bit Two-Step Sigma-Delta ADC
Mengyun Yue,Dong Wu,Zheyao Wang +2 more
TL;DR: The preliminary results have demonstrated the feasibility and the effectiveness of the proposed compression method, and the advantages are the embedded and simple circuits, considerable speed and storage space improvement, and low power consumption.
References
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Journal ArticleDOI
CMOS image sensors: electronic camera-on-a-chip
TL;DR: In this article, the requirements for CMOS image sensors and their historical development, CMOS devices and circuits for pixels, analog signal chain, and on-chip analog-to-digital conversion are reviewed and discussed.
Journal Article
CMOS image sensors: Electronic camera-on-a-chip
TL;DR: In this article, the requirements for CMOS image sensors and their historical development, CMOS devices and circuits for pixels, analog signal chain, and on-chip analog-to-digital conversion are reviewed and discussed.
Integrated analog-to-digital and digital-to-analog converters / Rudy Van De Plassche
TL;DR: This paper presents the converter as a black box, a guide to high-speed and high-resolution A/D and D/A converters, and some of the devices used in this converter, as well as some of their applications.
Book
Integrated Analog-To-Digital and Digital-To-Analog Converters
TL;DR: In this article, the converter as a black box is described, and the converter is compared with a black-box A/D converter and a high-resolution D/A converter.
Journal ArticleDOI
CMOS active pixel image sensors for highly integrated imaging systems
Sunetra K. Mendis,Sabrina E. Kemeny,R.C. Gee,Bedabrata Pain,Craig Staller,Quiesup Kim,Eric R. Fossum +6 more
TL;DR: In this paper, a family of CMOS-based active pixel image sensors (APSs) that are inherently compatible with the integration of on-chip signal processing circuitry is reported.