Point Grey Grasshopper - Customizable Data Formats and Modes

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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is over 8192Bpp into two smaller packets per isochronous period. This feature is unique to the
Grasshopper and requires software support to work properly.
For more information on this feature, please see
Knowledge Base Article 276.
4.4. Customizable Data Formats and Modes
The table below outlines the Format_7 custom image modes that are supported by the
Grasshopper. The implementation of these modes and the frame rates that are possible are not
specified by the DCAM, and are subject to change across firmware versions.
Mode_0, Mode 1, Mode_6 and Mode 7 are region of interest (sub-window) modes that allow the
user to only transmit a selected area of the image. Mode_1 is a pixel binning (subsampling)
mode. Color binning is supported in the 14S3C and 20S4C models. Refer to the Pixel Binning
and Region of Interest Modes section for information on mode implementation.
Moving the position of region of interest to a different location does not require the camera to be
stopped (isochronous transmission disabled) and restarted (iso enabled), unless the change is
illegal (e.g. moving the ROI outside the imaging area) or would affect the isochronous packet
size. Changing the size of the image or the pixel encoding format does require the stop/start
procedure. Ignoring the time required to do this in software (tearing down, then reallocating,
image buffers, write times to the camera, etc.), the maximum amount of time required for the
stop/start procedure is slightly more than one frame time.
L
The sizes and frame rates supported by monochrome (BW) models
are identical to the color models specified below, with the exception
that only Mono8 and Mono16 are supported. Images acquired by color
cameras using Mono8 or Mono16 modes are converted to greyscale
(monochrome) on-board the camera. Users interested in accessing the
raw Bayer data to apply their own color conversion algorithm or one of
the FlyCapture library algorithms should refer to the Color and
Greyscale Conversion section of this manual.
GRAS-03K2C
Mode
Pixel
Format
Unit Size
(H,V)
Min BPP
(Max Size)
Max BPP
(Max Size)
Max
Resolution
FPS
640 x 480
FPS
320 x 240
FPS
160 x 120
FPS
0 Mono8 8,2 4 2760
61
640x480
61 105 168
0 Mono16 8,2 4 5520
61
640x480
61 105 168
0 Raw8 8,2 160 8960
200
640x480
200 341 538
0 Raw16 8,2 320 9600
121
640x480
121 341 538