The operator ExpandLine stores the last image line of each input image. This stored image line will used to replace all image lines of the next image at the output. In other words, the operator copies the last image line to all lines of the next image.
Mind, that the behavior of this operator will only affect the following frame and not the current frame. Therefore, the output data of the first frame after acquisition start has to be be specified using parameter Init.
If the width of a successive frame is less than the previous frame, the operator will keep the image dimension and only output the first part of the stored line. If the width of a successive frame is greater than the previous frame, the operator will fill the missing pixels with random memory content.
Empty images are not supported.
Images with varying line lengths are not supported.
Input image dimension must be equal to the maximum image dimensions set in the link.