Sequence Mode - AVT Pike Technical Manual

Controlling image capture

Sequence mode

Examples
Mode
All modes
Fixed modes only
Format_7 only
Generally all AVT Pike cameras enable certain image settings to be modified
on the fly, e.g. gain and shutter can be changed by the host computer by
writing into the gain and shutter register even while the camera is running.
An uncertainty of up to 3 images remains because normally the host does not
know (especially with external trigger) when the next image will arrive.
Sequence mode is a different concept where the camera holds a set of dif-
ferent image parameters for a sequence of images. The parameter set is
stored volatile in the camera for each image to be recorded. This sequence
of parameter sets is simply called a sequence. The advantage is that the cam-
era can easily synchronize this parameter set with the images so that no
uncertainty can occur. All AVT Pike cameras support 32 different sequence
parameters.
Additionally to the sequence mode known from Marlin cameras, the Pike cam-
eras have:
• Repeat counter per sequence item
• Incrementing list pointer on input status (on/off)
• Pointer reset (software command; on input pin)
For a sequence of images, each image can be recorded with a different shut-
ter or gain to obtain different brightness effects.
The image area (AOI) of a sequence of images can automatically be modified,
thus creating a panning or sequential split screen effect.
The following registers can be modified to affect the individual steps of the
sequence. Different configurations can be accessed via e.g a footswitch
which is connected to an input.
this registers can be modified...
Cur_V_Mode, Cur_V_Format, ISO_Channel, ISO_Speed, Brightness,
White_Balance (color cameras only), Shutter, Gain, LUT, TestImage,
Image-Mirror, HSNR, Output-Ctrl, ColorCorrection matrix (color cam-
eras only), ISO-Channel, Shading-Ctrl, Sequence-Stepping Mode,
SIS_UserValue
Cur_V_Frm_Rate
Image_Position (AOI-Top, AOI-Left), Image_Size (AOI-Width, AOI-
Height), Color_Coding_ID*, Binning*, Sub-Sampling*,
Byte_Per_Packet
*hidden in video formats and video modes
Table 66: Registers to be modified within a sequence
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