Point Grey Grasshopper - General Camera Properties; Standard Data Formats, Modes and Frame Rates

Point Grey Research Grasshopper Technical Reference
Camera Operations and Features
Revised 26-Nov-10
Copyright (c) 2010 Point Grey Research Inc.
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4.1. General Camera Properties
The following section provides an overview of the camera properties implemented by the
Grasshopper. Descriptions of some of the following properties and how they are implemented can
be found in this Technical Reference. Refer to the PGR IEEE-1394 Digital Camera Register
Reference for additional definitions and descriptions of:
• “Auto”, “On/Off” and “One Push” - Control and Status Registers for Features section
• “Absolute Mode” - Absolute Value CSR Registers section
The following property ranges apply to a Grasshopper GRAS-50S5C running at 15 FPS, and can
change depending on the camera resolution and frame rate:
• Shutter / Extended Shutter: maximum values increase as frame rate decreases
• Pan / Tilt: maximum values increase with smaller non-Format_7 resolutions
• Frame Rate: range changes according to the current frame rate
L
Properties marked with a ‘(COL)’ apply to color models only and are
not implemented on cameras using a monochrome sensor.
Property Units Min Max Auto On/Off One
Push
Absolute
Mode
Brightness % 0 6.24 N N N Y
Auto Exposure EV -7.58 2.41 Y Y Y Y
Sharpness 0 4095 Y Y N N
White Balance 1 1023 Y Y Y N
Hue (COL) deg -180 179.91 Y N N Y
Saturation (COL) % 0 399.9 Y Y N Y
Gamma 0.5 4 Y N N Y
Pan 0 848 Y Y N N
Tilt 0 848 Y Y N N
Shutter ms 0 66.64 N Y Y Y
Gain dB -4.50 24.00 N Y Y Y
Trigger Delay s 0 65.00 Y N N Y
Frame Rate fps 0.49 16.52 Y Y N Y
Extended Shutter ms 0.01 63312.04
4.2. Standard Data Formats, Modes and Frame Rates
This section lists the different video formats, modes and frame rates that are supported by the
Grasshopper. Refer to the Customizable Formats and Modes for a list of supported partial image
(Format_7) modes. These standard modes are controlled using the following IIDC registers:
• CURRENT_VIDEO_FORMAT register 0x608
• CURRENT_VIDEO_MODE register 0x604
• CURRENT_FRAME_RATE register 0x600