Smart Image Sensor With Integrated Low Complexity Image Processing For Wireless Endoscope Capsules

• doi: 10.1016/S1007-0214(09)70121-X
• title: Smart image sensor with integrated low complexity image processing for wireless endoscope capsules
• publisher: TUP
• isbn:
• issn: 1007-0214
• rank: 3596
• access_type: OPEN_ACCESS
• content_type: Journals
• abstract: A smart image sensor was developed which integrates a digital pixel image sensor array with an image processor, designed for wireless endoscope capsules. The camera-on-a-chip architecture and its on-chip functionality facilitate the design of the packaging and power consumption of the integrated capsule. The power reduction techniques were carried out at both the architectural and circuit level. Gray coding and power gating in the sensor array to eliminate almost 500/0 of the switch activity on the data bus and more than 99% of the power dissipation in each pixel at a transmitting rate of 2 frames per second. Filtering and compression in the processor reduces the data transmission by more than 2/3. A parallel fully pipelined architecture with a dedicated clock management scheme was implemented in the JPEG-LS engine to reduce the power consumption by 15.7%. The smart sensor has been implemented in 0.18 urn CMOS technology.
• article_number: 6076256
• pdf_url: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6076256
• html_url: https://ieeexplore.ieee.org/document/6076256/
• abstract_url: https://ieeexplore.ieee.org/document/6076256/
• publication_title: Tsinghua Science and Technology
• conference_location:
• conference_dates:
• publication_number: 5971803
• is_number: 6076248
• publication_year: 2009
• publication_date: Oct. 2009
• start_page: 586
• end_page: 592
• citing_paper_count: 0
• citing_patent_count: 0
• download_count: 939
• insert_date: 20120117
• index_terms:
  • ieee_terms:
    • Clocks
    • Arrays
    • Image coding
    • Wireless communication
    • Wireless sensor networks
    • Image sensors
  • author_terms:
    • wireless endoscope capsule
    • digital pixel sensor
    • JPEG-LS
    • low power
  • dynamic_index_terms:
    • Image Processing
    • Image Sensor
    • Camera Sensor
    • Wireless Capsule
    • Digital Images
    • Power Consumption
    • Sensor Array
    • Digital Sensor
    • Gray Code
    • Grey Number
    • Data Bus
    • Time Step
    • Pulse Width
    • Pulsewidth Modulation
    • Positive Feedback Loop
    • Raw Images
    • Wireless Systems
    • Radio System
    • Lookup Table
    • State Machine
    • Finite State Machine
    • Finite-state
    • Image Capture
    • Pixel Level
    • Compression Ratio
    • Time-to-digital Converter
    • Real-time Data Processing
    • Sensor Pixel
    • Shift Register
    • Image Compression
    • Clock Frequency
    • On-chip Memory
• authors:
  • Author Name: Xiaowen Li
    Affiliation: Department of Electronic Enaineerinz, Tsinzhua University, Beijing 100084, China
    Author URL:
    ID:
    Order: 1
    Author Affiliations:
    • Department of Electronic Enaineerinz, Tsinzhua University, Beijing 100084, China
  • Author Name: Milin Zhang
    Affiliation: Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology, Hong Kong, China
    Author URL:
    ID:
    Order: 2
    Author Affiliations:
    • Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology, Hong Kong, China
  • Author Name: Zhihua Wang
    Affiliation: Institute of Microelectronics, Tsinghua University, Beijing 100084, China
    Author URL:
    ID:
    Order: 3
    Author Affiliations:
    • Institute of Microelectronics, Tsinghua University, Beijing 100084, China
  • Author Name: Amine Berrnak
    Affiliation: Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology, Hong Kong, China
    Author URL:
    ID:
    Order: 4
    Author Affiliations:
    • Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology, Hong Kong, China

Image Sensor

• sensor_type: Digital Pixel Sensor (DPS)
• resolution: 640x480 pixels
• dynamic_range: Not specified
• pixel_size: 24.5 μm
• 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: 2 fps
• signal_to_noise_ratio: 46.37 dB
• shutter_speed: 50 ms
• power_consumption: 2.2 mW

Applications & Benefits

• cell_imaging: Used in wireless endoscope capsules for internal imaging of digestive tracts.
• benefits: Significantly reduces area usage and power consumption in wireless endoscope capsule applications.

Supporting Organizations

• supported_by: Tsinghua University, Hong Kong University of Science and Technology, Institute of Microelectronics, Tsinghua University.

Manuscript Details

• publication_date: Oct. 2009

Relevancy Score

• score: 10
• missing_fields:
  • fill factor
  • quantum efficiency
  • readout speed
  • noise sources
  • analog-to-digital conversion techniques
  • microlenses
  • on-chip colour filters
  • global or rolling shutters
  • backside illumination

Processed JSON Filename

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