Highdr Framefree Pwm Imaging With Asynchronous Aer Intensity Encoding And Focalplane Temporal Redundancy Suppression

• doi: 10.1109/ISCAS.2010.5537150
• title: High-DR frame-free PWM imaging with asynchronous AER intensity encoding and focal-plane temporal redundancy suppression
• publisher: IEEE
• isbn: 978-1-4244-5309-2
• issn: 2158-1525
• partnum: 10CH38177
• rank: 2617
• access_type: LOCKED
• content_type: Conferences
• abstract: The presented asynchronous, time-based CMOS dynamic vision and image sensor is based on a QVGA (304×240) array of fully autonomous pixels containing event-based change detection and PWM imaging circuitry. Exposure measurements are initiated and carried out locally by the individual pixel that has detected a brightness change in its field-of-view. Thus pixels do not rely on external timing signals and independently and asynchronously request access to an (asynchronous arbitrated) output channel when they have new illumination values to communicate. Communication is address-event based (AER)-gray-levels are encoded in inter-event intervals. Pixels that are not stimulated visually do not produce output. This pixel-autonomous and massively parallel operation ideally results in optimal lossless video compression through complete temporal redundancy suppression at the focal-plane. Compression factors depend on scene activity. Due to the time-based encoding of the illumination information, very high dynamic range - intra-scene DR of 143dB static and 125dB at 30fps equivalent temporal resolution - is achieved. A novel time-domain correlated double sampling (TCDS) method yields array FPN of <;0.25%. SNR is >56dB (9.3bit) for >10Lx.
• article_number: 5537150
• pdf_url: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=5537150
• html_url: https://ieeexplore.ieee.org/document/5537150/
• abstract_url: https://ieeexplore.ieee.org/document/5537150/
• publication_title: Proceedings of 2010 IEEE International Symposium on Circuits and Systems
• conference_location: Paris, France
• conference_dates: 30 May-2 June 2010
• publication_number: 5512009
• is_number: 5536941
• publication_year: 2010
• publication_date: 30 May-2 June 2010
• start_page: 2430
• end_page: 2433
• citing_paper_count: 17
• citing_patent_count: 0
• download_count: 457
• insert_date: 20100803
• index_terms:
  • ieee_terms:
    • Pulse width modulation
    • Encoding
    • Sensor arrays
    • Lighting
    • CMOS image sensors
    • Image sensors
    • Pixel
    • Circuits
    • Brightness
    • Timing
  • dynamic_index_terms:
    • Focal Plane
    • Back Focal Plane
    • Field Of View
    • Dynamic Range
    • Change Detection
    • Arbitration
    • Image Sensor
    • Camera Sensor
    • Output Channels
    • High Dynamic Range
    • Vision Sensors
    • Lossless Compression
    • Lossless Data Compression
    • Video Compression
    • Compression Factor
    • Inter-event Intervals
    • Dynamic Vision Sensor
    • Event Camera
    • Optimal Compression
    • Integration Time
    • Scientific Applications
    • Contrast Sensitivity
    • Noise Floor
    • Machine Vision
    • Visual Navigation
    • Spike Probability
    • Temporal Contrast
    • Low Illumination
    • Video Resolution
• isbn_formats:
  • format: CD, value: 978-1-4244-5309-2, isbnType: New-2005
  • format: Print ISBN, value: 978-1-4244-5308-5, isbnType: New-2005
• authors:
  • Author Name: Christoph Posch
    Affiliation: Austrian Institute of Technology GmbH, Vienna, Austria
    Author URL: https://ieeexplore.ieee.org/author/37394392300
    ID: 37394392300
    Order: 1
    Author Affiliations:
    • Austrian Institute of Technology GmbH, Vienna, Austria
  • Author Name: Daniel Matolin
    Affiliation: Austrian Institute of Technology GmbH, Vienna, Austria
    Author URL: https://ieeexplore.ieee.org/author/37267061200
    ID: 37267061200
    Order: 2
    Author Affiliations:
    • Austrian Institute of Technology GmbH, Vienna, Austria
  • Author Name: Rainer Wohlgenannt
    Affiliation: Austrian Institute of Technology GmbH, Vienna, Austria
    Author URL: https://ieeexplore.ieee.org/author/37395107900
    ID: 37395107900
    Order: 3
    Author Affiliations:
    • Austrian Institute of Technology GmbH, Vienna, Austria

Image Sensor

• sensor_type: CMOS
• resolution: QVGA (304×240)
• dynamic_range: 143dB static, 125dB at 30fps
• pixel_size: 30µm × 30µm
• dark_current: ~3fA

Optical Data

• focal_length: Not specified
• aperture: Not specified
• field_of_view: Not specified
• distortion: Not specified

Performance Metrics

• frame_rate: 30fps equivalent, 500fps equivalent at low light
• signal_to_noise_ratio: >56dB (9.3bit) for >10Lx, 42.3dB (7bit) for ΔVth min (100mV) at 10Lx
• power_consumption: 50mW (static), 175mW (high activity)
• noise: <0.25% FPN (Fixed-Pattern Noise) at 10 Lx with TCDS

Applications & Benefits

• cell_imaging: High-speed/high temporal-resolution dynamic machine vision
• benefits: Lossless pixel-level video compression through temporal redundancy suppression, high dynamic range imaging for various applications including machine vision, automotive, industrial and scientific applications.

Supporting Organizations

• supported_by: AIT – Austrian Institute of Technology GmbH, Vienna, Austria

Manuscript Details

• publication_date: 30 May-2 June 2010

Relevancy Score

• score: 9
• missing_fields:
  • focal_length
  • aperture
  • field_of_view
  • distortion
  • sensitivity
  • shutter_speed

Processed JSON Filename

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