Image Acquisitionand Proces

74 Image Acquisition Processing with LabVIEW
FIGURE 4.17 Embed an IMAQ Vision Window in a parent example — wiring diagram.
Although the child window is embedded in the parent, programming data to it
is almost no different to when it was a ßoating window. However, keep in mind the
relative spatial coordinates as mentioned previously, and that moving the child even
partially outside of the parent’s bounds (Figure 4.18) will mask the image (perhaps
even completely, where it may seem that your image window has disappeared). If
you scroll a front panel while it contains a child window, the image may not be
correctly redrawn. Therefore, it is often a good idea to disable scrolling on a front
panel that will have an embedded IMAQ image.
4.3 THE IMAGE BROWSER
The image browser is a very useful function if you need to display a selection of
thumbnails to a user, perhaps with them selecting one (or more) for further processing.
The image browser itself is displayed as a ßoating IMAQ image window (Figure 4.19).
Loading images into the image browser is quite simple. First, the browser is
conÞgured, including its background color, size, style, and the number of images
you want displayed per line. The image browser is then displayed, like any other
image, and populated with images. Figure 4.20 shows the image browser is updated
after each image is inserted into it, but you could put the IMAQ WindDraw outside
of the for loop, causing the program to wait until all of the images have been inserted,
thus displaying them all simultaneously.
FIGURE 4.18 Embedded window poor move example.