VisualApplets
Operator Reference

Operator Library: Synchronization

This operator splits the input image into a number of smaller images. The image height of the smaller images is specified by parameter ImageHeight. For example, setting ImageHeight to 512 and using input images of 1024 lines, the operator will split the input image into two new smaller images with the image height of 512.

If the height of an input image is not divisible by the ImageHeight parameter value, the input image will be split into images of the specified height as far as possible. The remaining lines will generate an output image of smaller height. For example, if an input image of height 1024 is split into chunks of height 400, the operator will output two images of height 400 and and one image of height 224. If the input image height is less than parameter ImageHeight, the operator will not split the input image.

SplitImage can be used to perform a 1D to 2D conversion. The conversion is automatically performed if a link using the image protocol VALT_LINE1D is connected to the operator's input. For example, the 1D input of a line scan camera can be split into images of a specified height, effectively creating a 2D output stream. Example:

When changing the ImageHeight value dynamically while acquisition is running, the operator guarantees image integrity. The operator keeps the old ImageHeight value until the output frame is finished. After the completion of the current output frame the operator will start using the new ImageHeight value for further splitting.

The operator supports variable line length for all ImageHeight values, for example ImageHeight = 2:

The end of each line is marked by a Eol (End of Line) flag, so that there are no undefined data in the output images.