Capture Video  
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Menu:   Acquire > Capture  
Script:   grabIm, grabAvrg, grabInt, grabSeq, grabSeqAvrg  

This tab of the Capture dialog box lets you acquire a single image or a sequence of images from the video device selected in ImageWarp.
 
Mode
 
Choose among the following video capture modes.  
 
Single  
 
Lets you capture a single video frame as an image.  
 
Average  
 
Lets you capture a single image as a result of accumulating and averaging several video frames. This mode is usually used for the noise reduction.  
 
Integrate  
 
Lets you capture a single image as a result of accumulating and integrating several video frames. This mode is usually used to boost intensity values under low-light conditions.  
 
Sequence  
 
Lets you capture several video frames as an image sequence. See Sequences for more details.  
 
Sequence average  
 
Lets perform a sequential frame averaging and capture several averaged frames as an image sequence. . See Sequences for more details.  
 
Output
 
Displays the number of the workspace frame into which the acquired image or sequence will be placed. By default, ImageWarp will set this number to the first available value. Type or select another value if you want the output image to be placed into a different frame.  
 
Note – ImageWarp's frames are the numbered windows in which the images and sequences reside, and they should not be confused with the frames of the video stream.  
 
Frames
 
Displays the amount of video frames to be captured into the sequence or used for averaging. Type or select another value if you want to change the number of video frames to be captured.  
 
Note – selecting a large number of frames in the Sequence mode can lead to the memory overload. To avoid it, ImageWarp sets the limit to the maximum number of frames based on the amount of RAM available in the system.  
 
Delay
 
Displays the delay (in milliseconds) between consecutive video frames to be captured into a sequence or used for image averaging/integration. Type or select the desired interval between frames. If the video device frame rate exceeds the selected delay time, ImageWarp will use the fastest frame rate possible for the current video device adjusting the actual delay time accordingly.  
 
Window
 
Displays the number of consecutive frames used for the sequential averaging or integration. For better performance this parameter must be a power of 2.  
 
Auto exposure
 
Select this option in the Integrate mode to activate the software auto-exposure. ImageWarp does it by automatically re-adjusting the number of consecutive frames being integrated to produce the "best-fit" image.  
 
Input Preview
 
Check this box to have ImageWarp display a minimized live video in the preview window of the dialog box. During the capture process, live preview is automatically synchronized with the ongoing frame rate.  
 
Output Preview
 
Check this box to have ImageWarp display a full size image resulting from executing the current acquisition function in real time. The number of the image frame in which the output preview is displayed can be selected in the corresponding box.  
 
Note – it is not recommended that the live previews of the capture dialog be enabled while the Video Window is displayed because it can disturb the video stream and lower the frame rate.  
 
Apply
 
Click this button to start capturing. The progress indicator on the status bar will display the capture progress for the Average and Sequence modes.  
 
Note – you can cancel capturing by pressing the PAUSE/BREAK key at any time during the capture process.