Instruction manual

Glossary
PIKE Technical Manual V3.1.0
262
OHCI OHCI = Open Host Controller Interface
One-push autofocus Focus hold mode that can be automatically readjusted as required by the
user (one-push autofocus trigger) assuming that the required subject is
within the focusing limits of the camera lens.
One-push white
balance
AVT color cameras have not only manual but also one-push white balance.
For white balance, in total a number of frames are processed and a grid of
a number of samples is equally spread over the whole image area.
The R-G-B component values of the samples are added and are used as
actual values for both the one-push and the automatic white balance.
This feature uses the assumption that the R-G-B component sums of the
samples are equal; i.e., it assumes that the average of the sampled grid pix-
els is to be monochrome.
Opaque mask In CCD imaging technology, a light-impenetrable material that is used to
shield selected parts of a photosensitive surface. Opaque masks are used
in interline transfer CCDs and frame transfer CCDs.
Open Host Controller
Interface
Open Host Controller Interface (OHCI) describes the standards created by
software and hardware industry leaders (including Microsoft, Apple,
Compaq, Intel, Sun Microsystems, National Semiconductor, and Texas
Instruments) to assure that software (operating systems, drivers, applica-
tions) works properly with any compliant hardware.
Optical Character
Recognition
Optical Character Recognition (OCR) refers to the use of machine vision
cameras and computers to read and analyze human-readable alphanumeric
characters to recognize them.
Optocoupler An optocoupler is a device that uses a short optical transmission path to
transfer a signal between elements of a circuit, typically a transmitter and
a receiver, while keeping them electrically isolated. Advantage: Since the
signal goes from an electrical signal to an optical signal back to an elec-
trical signal, electrical contact along the path is broken.
PCI-Express PCI-Express (PCIE) is the next generation bus architecture and is compat-
ible with the current PCI software environment while offering low-cost
with scalable performance for the next generation of computing and com-
munications platforms. PCIE is a serial technology with point-to-point con-
nection to provide 2.5 Gbit/s per lane which is 2 times faster than current
PCI technology. PCIE is scalable to form multiple lanes like x1, x2, x4, x8,
x16, and x32.
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