get_framegrabber_paramT_get_framegrabber_paramGetFramegrabberParamGetFramegrabberParamget_framegrabber_param (算子)

名称

get_framegrabber_paramT_get_framegrabber_paramGetFramegrabberParamGetFramegrabberParamget_framegrabber_param — 查询图像采集设备的具体参数。

签名

get_framegrabber_param( : : AcqHandle, Param : Value)

描述

算子 get_framegrabber_paramget_framegrabber_paramGetFramegrabberParamGetFramegrabberParamGetFramegrabberParamget_framegrabber_param returns specific parameter values for the image acquisition device specified by AcqHandleAcqHandleAcqHandleAcqHandleacqHandleacq_handle. The standard parameters listed below are available for all image acquisition devices. Additional parameters may be supported by a specific image acquisition device. A list of those parameters can be obtained with the query 'parameter'"parameter""parameter""parameter""parameter""parameter" via info_framegrabberinfo_framegrabberInfoFramegrabberInfoFramegrabberInfoFramegrabberinfo_framegrabber。

Standard values for ParamParamParamParamparamparam, see open_framegrabberopen_framegrabberOpenFramegrabberOpenFramegrabberOpenFramegrabberopen_framegrabber:

'name'"name""name""name""name""name": Name of the image acquisition interface.
'horizontal_resolution'"horizontal_resolution""horizontal_resolution""horizontal_resolution""horizontal_resolution""horizontal_resolution": Horizontal resolution of the image acquisition device.
'vertical_resolution'"vertical_resolution""vertical_resolution""vertical_resolution""vertical_resolution""vertical_resolution": Vertical resolution of the image acquisition device.
'image_width'"image_width""image_width""image_width""image_width""image_width": Width of the specified image part.
'image_height'"image_height""image_height""image_height""image_height""image_height": Height of the specified image part.
'start_row'"start_row""start_row""start_row""start_row""start_row": Row coordinate of upper left corner of specified image part.
'start_column'"start_column""start_column""start_column""start_column""start_column": Column coordinate of upper left corner of specified image part.
'field'"field""field""field""field""field": Selected video field or full frame.
'bits_per_channel'"bits_per_channel""bits_per_channel""bits_per_channel""bits_per_channel""bits_per_channel": Number of transferred bits per pixel and image channel.
'color_space'"color_space""color_space""color_space""color_space""color_space": Color space of resulting image.
'generic'"generic""generic""generic""generic""generic": Generic value with device-specific meaning.
'external_trigger'"external_trigger""external_trigger""external_trigger""external_trigger""external_trigger": External triggering ('true'"true""true""true""true""true"/ 'false'"false""false""false""false""false").
'camera_type'"camera_type""camera_type""camera_type""camera_type""camera_type": Type of used camera (interface-specific).
'device'"device""device""device""device""device": Device name of the image acquisition device.
'port'"port""port""port""port""port": Port the image acquisition device is connected to.
'line_in'"line_in""line_in""line_in""line_in""line_in": Camera input line of multiplexer (optional).

注意

For a multithreaded application, info_framegrabberinfo_framegrabberInfoFramegrabberInfoFramegrabberInfoFramegrabberinfo_framegrabber, open_framegrabberopen_framegrabberOpenFramegrabberOpenFramegrabberOpenFramegrabberopen_framegrabber, and close_framegrabberclose_framegrabberCloseFramegrabberCloseFramegrabberCloseFramegrabberclose_framegrabber are executed exclusively.

get_framegrabber_paramget_framegrabber_paramGetFramegrabberParamGetFramegrabberParamGetFramegrabberParamget_framegrabber_param runs in parallel with all non-exclusive operators inside and outside of this group.

执行信息

多线程类型：可重入（与非独占算子并行运行）。
多线程作用域：全局（可从任何线程调用）。
未采用并行化处理。

参数

AcqHandleAcqHandleAcqHandleAcqHandleacqHandleacq_handle (输入控制) framegrabber → (handle)

Handle of the acquisition device to be used.

ParamParamParamParamparamparam (输入控制) string(-array) → (string)

Parameter of interest.

默认值： 'revision' "revision" "revision" "revision" "revision" "revision"

建议值： 'bits_per_channel'"bits_per_channel""bits_per_channel""bits_per_channel""bits_per_channel""bits_per_channel", 'camera_type'"camera_type""camera_type""camera_type""camera_type""camera_type", 'color_space'"color_space""color_space""color_space""color_space""color_space", 'continuous_grabbing'"continuous_grabbing""continuous_grabbing""continuous_grabbing""continuous_grabbing""continuous_grabbing", 'device'"device""device""device""device""device", 'external_trigger'"external_trigger""external_trigger""external_trigger""external_trigger""external_trigger", 'field'"field""field""field""field""field", 'generic'"generic""generic""generic""generic""generic", 'grab_timeout'"grab_timeout""grab_timeout""grab_timeout""grab_timeout""grab_timeout", 'horizontal_resolution'"horizontal_resolution""horizontal_resolution""horizontal_resolution""horizontal_resolution""horizontal_resolution", 'image_available'"image_available""image_available""image_available""image_available""image_available", 'image_height'"image_height""image_height""image_height""image_height""image_height", 'image_width'"image_width""image_width""image_width""image_width""image_width", 'line_in'"line_in""line_in""line_in""line_in""line_in", 'name'"name""name""name""name""name", 'port'"port""port""port""port""port", 'revision'"revision""revision""revision""revision""revision", 'start_column'"start_column""start_column""start_column""start_column""start_column", 'start_row'"start_row""start_row""start_row""start_row""start_row", 'vertical_resolution'"vertical_resolution""vertical_resolution""vertical_resolution""vertical_resolution""vertical_resolution", 'volatile'"volatile""volatile""volatile""volatile""volatile"

ValueValueValueValuevaluevalue (输出控制) string(-array) → (string / real / integer / handle)

Parameter value.

结果

If the image acquisition device is open and the specified parameter is supported, the operator get_framegrabber_paramget_framegrabber_paramGetFramegrabberParamGetFramegrabberParamGetFramegrabberParamget_framegrabber_param 返回值 2 ( H_MSG_TRUE )。否则将抛出异常。

可能的前趋

open_framegrabberopen_framegrabberOpenFramegrabberOpenFramegrabberOpenFramegrabberopen_framegrabber, set_framegrabber_paramset_framegrabber_paramSetFramegrabberParamSetFramegrabberParamSetFramegrabberParamset_framegrabber_param

可能的后继

grab_imagegrab_imageGrabImageGrabImageGrabImagegrab_image, grab_datagrab_dataGrabDataGrabDataGrabDatagrab_data, grab_image_startgrab_image_startGrabImageStartGrabImageStartGrabImageStartgrab_image_start, grab_image_asyncgrab_image_asyncGrabImageAsyncGrabImageAsyncGrabImageAsyncgrab_image_async, grab_data_asyncgrab_data_asyncGrabDataAsyncGrabDataAsyncGrabDataAsyncgrab_data_async, set_framegrabber_paramset_framegrabber_paramSetFramegrabberParamSetFramegrabberParamSetFramegrabberParamset_framegrabber_param, close_framegrabberclose_framegrabberCloseFramegrabberCloseFramegrabberCloseFramegrabberclose_framegrabber

另见

open_framegrabberopen_framegrabberOpenFramegrabberOpenFramegrabberOpenFramegrabberopen_framegrabber, info_framegrabberinfo_framegrabberInfoFramegrabberInfoFramegrabberInfoFramegrabberinfo_framegrabber, set_framegrabber_paramset_framegrabber_paramSetFramegrabberParamSetFramegrabberParamSetFramegrabberParamset_framegrabber_param

模块

基础

算子