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Oasis-Knowledge
Sensors
OV-5647: Raspberry Pi Camera
Quickstart:
Introduction:
The OV-5647 Raspberry Pi Camera Module is a compact and versatile digital imaging device designed to work seamlessly with the Raspberry Pi platform. It captures images by detecting light intensity and frequency across a two-dimensional sensor grid, operating on the foundational pinhole camera model principle. This model focuses light through a lens to create an inverted image, which is then corrected when displayed as digital pixels. The camera's adjustable focal length allows for clear image capture of objects at varying distances, making it suitable for a range of applications. It is most commonly used in photography, computer vision projects, and for educational purposes, providing a practical tool for both hobbyists and professionals in exploring digital imaging and vision applications.
Functional Diagram:
Features
Feature
Description
Additional Details
Pixel Technology
1.4 µm x 1.4 µm pixel with OmniBSI technology
High sensitivity, low crosstalk, low noise, improved quantum efficiency
Optical Size
1/4”
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Automatic Image Control
Automatic exposure control (AEC), Automatic white balance (AWB), Automatic band filter (ABF)
Automatic 50/60 Hz luminance detection, Automatic black level calibration (ABLC)
Programmable Controls
Frame rate, AEC/AGC 16-zone size/position/weight control
Mirror and flip, Cropping, windowing, panning
Image Quality Controls
Color saturation, Hue, Gamma
Sharpness (edge enhancement), Lens correction, Defective pixel canceling, Noise canceling
Output Formats
RAW RGB, RGB565/555/444, CCIR656
YUV422/420, YCbCr422, Compression
Operation Support
Video or snapshot operations
Internal and external frame synchronization for frame exposure mode
Flash and Strobe Support
LED and flash strobe mode
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Sub-sampling and Binning
Horizontal and vertical sub-sampling, binning
Minimizing artifacts on binned images
Data Compression
Supports data compression output
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Anti-shake
Supports anti-shake functionality
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Interface
Standard serial SCCB interface
Digital video port (DVP) parallel output, dual lane MIPI output
Power and Connectivity
Embedded 1.5V regulator for core power
Programmable I/O drive capability, I/O tri-state configurability
Additional Features
Supports black sun cancellation
Supports image sizes up to 5 megapixels, arbitrary size scaling down
Auto Focus Control
Supports auto focus control (AFC)
Embedded AF VCM driver
Embedded Components
Embedded microcontroller
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Module Size
Suitable for 8.5 x 8.5 x <6mm
Both CSP and RW packaging
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Working Principle:
Digital cameras work by detecting light intensity and frequency over a 2D grid. A lens focuses light from a single point, which creates an inverted image when these values are registered on the sensor grid. The image captured is then re-inverted to correct for this when converted to pixels on a screen. You now have a digital photograph. This is the pinhole camera model, and it forms the basic theory for of nearly all modern photography and computer vision applications.
Modern cameras lenses can have their focal length changed to create a clear image for objects at different distances.
Sources:
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