A Computational Image Sensor With Adaptive Pixelbased Integration Time

• doi: 10.1109/4.913735
• title: A computational image sensor with adaptive pixel-based integration time
• publisher: IEEE
• isbn:
• issn: 1558-173X
• rank: 1029
• access_type: LOCKED
• content_type: Journals
• abstract: An image sensor is proposed in which the pixel adapts its integration time to motion and light. The integration time of each pixel is shortened if motion is detected in the pixel or pixel intensity becomes saturated. The adaptivity of motion and light significantly enhances temporal resolution and dynamic range of the sensor. Because the integration time differs pixel-by-pixel, a scene containing both a bright and a dark region will be captured by pixels of shorter and longer integration times. Because the integration time adapts to motion, higher temporal resolution is obtained in a moving area and a higher signal-to-noise ratio in a static area. The control of the integration time is done on the sensor focal plane, with column parallel processing circuits integrated in CMOS image sensor. A prototype of 32/spl times/32 pixels has been fabricated by using 1-poly 2-metal CMOS 1-/spl mu/m process. The fundamental functions have been verified. By the experiments, it has been verified that the sensor can reduce motion blur by adapting the integration time to motion and achieve wide dynamic range by adapting to light when the minimum integration interval is 680 /spl mu/s.
• article_number: 913735
• pdf_url: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=913735
• html_url: https://ieeexplore.ieee.org/document/913735/
• abstract_url: https://ieeexplore.ieee.org/document/913735/
• publication_title: IEEE Journal of Solid-State Circuits
• conference_location:
• conference_dates:
• publication_number: 4
• is_number: 19725
• publication_year: 2001
• publication_date: April 2001
• start_page: 580
• end_page: 585
• citing_paper_count: 40
• citing_patent_count: 9
• download_count: 673
• insert_date: 20020807
• index_terms:
  • ieee_terms:
    • Image sensors
    • Pixel
    • CMOS image sensors
    • Dynamic range
    • Motion detection
    • Layout
    • Signal resolution
    • Signal to noise ratio
    • Parallel processing
    • Circuits
  • dynamic_index_terms:
    • Integration Time
    • Image Sensor
    • Camera Sensor
    • Dynamic Range
    • Pixel Intensity
    • Focal Plane
    • Back Focal Plane
    • Dark Regions
    • Minimum Interval
    • Minimum Time Interval
    • Motion Blur
    • Processing Circuit
    • Static Area
    • Magnitude Of Differences
    • Photodiode
    • Image Reconstruction
    • Iterative Reconstruction
    • Tomographic Reconstruction
    • Processing Elements
    • Motion Detection
    • Motion Sensors
    • Circuit Design
    • Single Pixel
    • Pixel Array
    • Differential Amplifier
    • Shift Register
    • Pixel Column
    • Memory Array
• authors:
  • Author Name: T. Hamamoto
    Affiliation: Department of Electrical Engineering, Science University of Tokyo, Tokyo, Japan
    Author URL: https://ieeexplore.ieee.org/author/37285218100
    ID: 37285218100
    Order: 1
    Author Affiliations:
    • Department of Electrical Engineering, Science University of Tokyo, Tokyo, Japan
  • Author Name: K. Aizawa
    Affiliation: Department of Electrical Engineering, University of Tokyo, Tokyo, Japan
    Author URL: https://ieeexplore.ieee.org/author/37335828200
    ID: 37335828200
    Order: 2
    Author Affiliations:
    • Department of Electrical Engineering, University of Tokyo, Tokyo, Japan

Image Sensor

• sensor_type: CMOS
• resolution: 32x32 pixels
• dynamic_range: 56 dB
• pixel_size: 1 µm
• dark_current: not specified

Optical Data

• focal_length: not specified
• aperture: not specified
• field_of_view: not specified
• distortion: not specified

Performance Metrics

• shutter_speed: 1/60s
• noise: 3.1 mVRMS

Applications & Benefits

• cell_imaging: The sensor can be used for high-speed imaging or wide dynamic range imaging, beneficial for various applications including vehicle imaging systems.
• benefits: Significantly enhances temporal resolution and dynamic range, reduces motion blur, and adapts to local light conditions.

Supporting Organizations

• supported_by: Science University of Tokyo, University of Tokyo

Manuscript Details

• publication_date: April 2001

Relevancy Score

• score: 10
• missing_fields:
  • focal_length
  • aperture
  • field_of_view
  • distortion
  • frame_rate
  • sensitivity
  • power_consumption

Processed JSON Filename

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