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Chapter 3 ‚ Camera Functions
page 14
camRAM
memory segment 1
memory
segment 2
Figure 3.3:
memory
segm. 3 memory segment 4
Illustration of a sample camRam (primary image memory)
segmentation in the camera. Various configurations are possible
for the four memory segments to record various image formats,
binning modes or ROIs. The image format is fixed within the
same segment.
The image memory segment size is determined by both
the number of images it can accept, as well as by the
smallest possible memory unit, a page. The size of this
page is 1280 pixel for CCD image sensors and 3584 pixel
for CMOS image sensors.
memory segment 1
page
Figure 3.4:
Ilustration of one memory segment (e.g. memory segment 1). In
this example, he images are stored, where the smallest memory
unit is a "page", i.e. each image has to be an integer multiple of
this basic memory unit page.
Therefore the memory demand for a total image always
must be an integer multiple of this basic unit.
3.2.2 Operating Modes
There are two basic operating modes for the camRAM:
-
FIFO buffer
Record mode
FIFO BufferMode
In the buffer or FIFO buffer (FIFO = first in first out) mode,
the camera records and stores image data while simultaneously transmitting this image data to the computer.
User Manual pco.camera status 12/2004