Справочник Пользователя для National Instruments Image Acquisition Software
Chapter 2
Software Overview
2-2
©
National Instruments Corporation
Generic Functions
Use generic functions in both high-level and low-level applications.
imgInterfaceOpen
Opens by name an interface as specified
in the IMAQ Configuration Utility.
in the IMAQ Configuration Utility.
imgSessionOpen
Opens a session of an unknown type and
returns a session ID.
returns a session ID.
imgClose
Closes a session or interface and unlocks
and releases all buffers associated with
the data type.
and releases all buffers associated with
the data type.
High-Level Functions
Use high-level functions to quickly and easily capture images. If you need
more advanced functionality, you can mix high-level functions with
low-level functions.
more advanced functionality, you can mix high-level functions with
low-level functions.
Snap Functions
Snap functions program the session to capture all or a portion of a single
frame or field to the user buffer.
frame or field to the user buffer.
imgSnap
Performs a single frame and field
acquisition.
acquisition.
imgSnapArea
Performs an area-specific frame or field
acquisition.
acquisition.
Grab Functions
Grab functions start a continuous image acquisition to a user buffer. Any
frame or field can be copied from the grab buffer to another user buffer.
frame or field can be copied from the grab buffer to another user buffer.
imgGrabSetup
Configures and optionally starts a
continuous acquisition.
continuous acquisition.
imgGrab
Performs a transfer from a continuous
acquisition session. Call this function
only after calling
acquisition session. Call this function
only after calling
imgGrabSetup
.
UM.book Page 2 Monday, July 13, 1998 9:49 AM