Design Of A Pseudowide Dynamic Range Cmos Image Sensor By Using The Bidirectional Gamma Curvature Technique

• doi: 10.1109/TCSII.2021.3065992
• title: Design of a Pseudo-Wide Dynamic Range CMOS Image Sensor by Using the Bidirectional Gamma Curvature Technique
• publisher: IEEE
• isbn:
• issn: 1558-3791
• rank: 2173
• access_type: LOCKED
• content_type: Journals
• abstract: This brief presents a 640×480 CMOS image sensor (CIS) with in-circuit bidirectional gamma correction for use in computer vision applications. The conventional gamma correction method can saturate the bright region in an image, leading to the loss of bright image information. Using the proposed bidirectional gamma correction method, which can be implemented with a log-exponential counter, both bright and dark regions in an image can be simultaneously corrected. The transfer function of an 8-bit single-slope analog-to-digital converter can be selected considering either linear or bidirectional gamma curves with three different slope-change points to enhance the visibility in the pseudo-dynamic range. From the prototype sensor, we observed that the visibility of dark images was increased with proper bidirectional gamma curvatures. The CIS was fabricated in a 110 nm CIS process, and the full chip area was 5900 μm × 5240 μm. The total power consumption was 6 mW at a rate of 15 frames per second with an analog, pixel, and digital supply voltage of 3.3 V, 3.3 V, and 1.5 V, respectively.
• article_number: 9378813
• pdf_url: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9378813
• html_url: https://ieeexplore.ieee.org/document/9378813/
• abstract_url: https://ieeexplore.ieee.org/document/9378813/
• publication_title: IEEE Transactions on Circuits and Systems II: Express Briefs
• conference_location:
• conference_dates:
• publication_number: 8920
• is_number: 9419893
• publication_year: 2021
• publication_date: May 2021
• start_page: 1596
• end_page: 1599
• citing_paper_count: 2
• citing_patent_count: 0
• download_count: 819
• insert_date: 20210315
• index_terms:
  • ieee_terms:
    • Generators
    • Random access memory
    • Transfer functions
    • Signal resolution
    • Lighting
    • Frequency control
    • Dynamic range
  • author_terms:
    • CMOS image sensor
    • dynamic range
    • gamma correction
    • log-exponential counter
    • single-slope analog-to-digital converter
  • dynamic_index_terms:
    • Dynamic Range
    • Computer Vision
    • Power Consumption
    • Image Regions
    • Computer Vision Applications
    • Gamma Correction
    • Gamma-corrected
    • Dark Images
    • Total Power Consumption
    • Sensor Prototype
    • Part Of The Image
    • Linear Mode
    • Linear Transition
    • Comparable Yields
    • Comparator Output
    • Comparison Of Yield
    • Comparison Of Outputs
    • White Images
    • Clock Frequency
    • Black Images
    • Voltage Ramp
    • Low Illumination
    • Frames Per Second
    • High Illumination
    • Low Luminance
    • Output Pixel
    • Output Code
• authors:
  • Author Name: Hyejin Im
    Affiliation: Department of Semiconductor Science, Dongguk University, Seoul, South Korea
    Author URL: https://ieeexplore.ieee.org/author/37086429528
    ID: 37086429528
    Order: 1
    Author Affiliations:
    • Department of Semiconductor Science, Dongguk University, Seoul, South Korea
  • Author Name: Keunyeol Park
    Affiliation: Department of Semiconductor Science, Dongguk University, Seoul, South Korea
    Author URL: https://ieeexplore.ieee.org/author/37085992237
    ID: 37085992237
    Order: 2
    Author Affiliations:
    • Department of Semiconductor Science, Dongguk University, Seoul, South Korea
  • Author Name: Jae Hee Cho
    Affiliation: Department of Semiconductor Science, Dongguk University, Seoul, South Korea
    Author URL: https://ieeexplore.ieee.org/author/37088852908
    ID: 37088852908
    Order: 3
    Author Affiliations:
    • Department of Semiconductor Science, Dongguk University, Seoul, South Korea
  • Author Name: Hyun Seon Choo
    Affiliation: Department of Semiconductor Science, Dongguk University, Seoul, South Korea
    Author URL: https://ieeexplore.ieee.org/author/37088852655
    ID: 37088852655
    Order: 4
    Author Affiliations:
    • Department of Semiconductor Science, Dongguk University, Seoul, South Korea
  • Author Name: Soo Youn Kim
    Affiliation: Department of Semiconductor Science, Dongguk University, Seoul, South Korea
    Author URL: https://ieeexplore.ieee.org/author/37859344600
    ID: 37859344600
    Order: 5
    Author Affiliations:
    • Department of Semiconductor Science, Dongguk University, Seoul, South Korea

Image Sensor

• sensor_type: CMOS
• resolution: 640x480
• dynamic_range: Not Specified
• pixel_size: Not Specified
• dark_current: Not Specified

Optical Data

• focal_length: Not Specified
• aperture: Not Specified
• field_of_view: Not Specified
• distortion: Not Specified

Performance Metrics

• frame_rate: 15 fps
• signal_to_noise_ratio: Not Specified
• sensitivity: Not Specified
• shutter_speed: Not Specified
• power_consumption: 6 mW
• noise: Not Specified

Applications & Benefits

• cell_imaging: Not Specified
• benefits: The proposed CIS allows for improved image quality under varied lighting conditions through bidirectional gamma correction, enhancing visibility in both bright and dark areas.

Supporting Organizations

• supported_by: Samsung Electronics Co., Ltd., Ministry of Trade, Industry & Energy (MOTIE), Korea Semiconductor Research Consortium (KSRC), Ministry of Science and ICT (MSIT)

Manuscript Details

• publication_date: May 2021

Relevancy Score

• score: 10
• missing_fields:
  • fill factor
  • quantum efficiency
  • readout speed
  • temporal noise
  • fixed-pattern noise
  • microlenses
  • on-chip colour filters
  • global or rolling shutters
  • backside illumination

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