ALLIED Vision Technologies Marlin F-201 - Manual (Page 128)

Controlling image capture
MARLIN Technical Manual V2.4.0
128
Frame memory and deferred image transport
An image is normally captured and transported in consecutive steps. The
image is taken, read out from the sensor, digitized and sent over the 1394
bus.
Deferred image transport
As all Marlin cameras are equipped with built in image memory, this order of
events can be paused or delayed by using the deferred image transport fea-
ture.
Marlin cameras are equipped with 8 MB of RAM. The table below shows how
many frames can be stored by each model. The memory operates according
to the FIFO (first in, first out) principle. This makes addressing for individual
images unnecessary.
Deferred image transport is especially useful for multi-camera applications:
Assuming several cameras acquire images concurrently. These are stored in
the built-in image memory of every camera. Until this memory is full, the lim-
iting factor of available bus bandwidth, DMA- or ISO-channel is overcome.
Model Memory Size
Marlin F-033 17 frames
Marlin F-046 13 frames
Marlin F-080 7 frames
Marlin F-131 4 frames
Marlin F-145 3 frames
Marlin F-146 3 frames
Marlin F-201 2 frames
Table 49: FIFO memory size
Note
L
Configuration
To configure this feature in an advanced register: See Table
109: Advanced register: Deferred image transport on page
215.