This LabVIEW snippet demonstrates a fundamental image loading and display sequence using OpenLvVision functions.

  1. Create Image Reference:

    • The “OLVCreate” function (1) initializes a new, empty image reference.
    • In LabVIEW, image data is handled by references, meaning the wire carries a pointer to the image data’s location in memory, not the image data itself.
    • This is a crucial distinction, as image references do not adhere to LabVIEW’s standard dataflow paradigm where data is copied between functions.

  2. Read Image File:

    • The “OLVReadFile” function (2) loads an image from the specified file path.
    • When the “UseFilePartImageType” input is set to TRUE (as indicated by the constant), the appropriate image file format reader is automatically selected, simplifying the loading process.

  3. Draw Image to Control:

    • Draws the image onto a control.
    • Note: If the control is configured for snapshots, it will retain a copy of the image; otherwise, the image will be lost after disposal.

  4. Dispose Image:

    • Finally, the “OLVDispose” function (5) releases the memory allocated for the image data referenced by the initial “OLVCreate” function.
    • It is essential to dispose of image references when they are no longer required to prevent memory leaks and ensure efficient memory management within your LabVIEW application.

ReadImageFile