Point Grey Flea3 USB 3.0 Technical Reference 5 Video Formats, Modes and Frame Rates
Mode 0
Mode 0 allows only for specifying a region of interest, and does not perform any binning. Frame rate does not
increase when ROI size is reduced.
Mode 1
Mode 1 implements a combination of 2X horizontal and 2X vertical additive binning. This mode results in a resolution
that is both half the width and half the height of the original image.
For the FL3-U3-13S2, FL3-U3-13E4, and FL3-U3-32S2 mono models, mode 1 may result in an increase in brightness
and improved signal-to-noise ratio. Frame rate does increase.
For the FL3-U3-13E4 color model, frame rate and brightness increase but there is no improvement to signal-to-noise
ratio.
Mode 1 (FL3-U3-13Y3M)
For the FL3-U3-13Y3M, mode 1 implements a combination of 2X horizontal and 2X vertical subsampling. This mode
results in a resolution that is both half the width and half the height of the original image.
Frame rate increases, but there is no increase in brightness nor improvement to signal-to-noise ratio.
Mode 2
Mode 2 implements a combination of 2X horizontal and 2X vertical subsampling. It results in a faster frame rate, but
there is no increase in brightness or improvement to signal-to-noise ratio.
Mode 4
Mode 4 implements a combination of 2X horizontal and 2X vertical binning. Both horizontal and vertical binning are
performed on the sensor, prior to color processing. It results in an increase in image intensity by a factor of four, and
improved signal-to-noise ratio.
Mode 7
Mode 7 allows only for specifying a region of interest, and does not perform any binning. This mode uses a slower
pixel clock, and is recommended for longer extended shutter times (FL3-U3-13S2 to 1 second and FL3-U3-32S2 to 32
seconds). Frame rate does not increase when ROI size is reduced. Mode 7 output is in 12 bits.
Mode 7 (FL3-U3-13E4)
For the FL3-U3-13E4 mono and color cameras, mode 7 enables a rolling shutter. There is no increase in frame rate or
brightness, but signal-to-noise ratio may be improved.
Mode 8
Mode 8 is a region of interest mode, with no binning, and is recommended for smaller fields of vision at faster frame
rates. On FL3-U3-13S2 models, the maximum size of the ROI is 688 x 504. The width must be a multiple of 16. The ROI
can change position within the entire 2080 x 1552 pixel array. The maximum frame rate stays constant regardless of
the ROIsize.
Revised 9/27/2012
Copyright ©2011-2012 Point Grey Research Inc.
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