A 151 dB high dynamic range CMOS image sensor chip architecture with tone mapping compression embedded in-pixel
| Autor: | Ángel Rodríguez-Vázquez, S. Vargas-Sierra, Gustavo Liñán-Cembrano |
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| Přispěvatelé: | Office of Naval Research (ONR). United States, Ministerio de Ciencia e Innovación (MICIN). España |
| Rok vydání: | 2015 |
| Předmět: |
Computer science
media_common.quotation_subject ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Tone mapping Pulse width modulation CMOS image sensors Real-time hdr video Histogram High dynamic range Contrast (vision) Computer vision Electrical and Electronic Engineering Image sensor Instrumentation ComputingMethodologies_COMPUTERGRAPHICS media_common Pixel Dynamic range business.industry Frame (networking) CMOS image sensor Artificial intelligence business |
| Zdroj: | idUS. Depósito de Investigación de la Universidad de Sevilla instname Digital.CSIC. Repositorio Institucional del CSIC |
| Popis: | This paper presents a high dynamic range CMOS image sensor that implements an in-pixel content-aware adaptive global tone mapping algorithm during image capture operation. The histogram of the previous frame of an auxiliary image, which contains time stamp information, is employed as an estimation of the probability of illuminations impinging pixels at the present frame. The compression function of illuminations, namely tone mapping curve, is calculated using this histogram. A QCIF resolution proof-of-concept prototype has been fabricated using a 0.35 μm opto-flavored standard technology. The sensor is capable of mapping scenes with a maximum intra-frame dynamic range of 151 dB (25 bits/pixel in linear representation) by compressing them to only 7 bits/pixel, while keeping visual quality in details and contrast. The in-pixel on-the-fly fully parallel tone mapping achieves high-frame rate allowing real-time high dynamic range video (120 dB at 30 frames/s). |
| Databáze: | OpenAIRE |
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