The STD Method

Upon setting the parameter to the STD value, the grabbing window is adjusted to a size expressed by numbers taken from a set of definite values.

The number of active columns is computed from the camera timing definition and the grabber's sampling frequency.

The number of active lines is computed from the camera timing definition and from the possible frame or field acquisition modality.

These numbers are "rounded" to standard values according to the following rules:

Active columns	Grabbing window width	Active lines	Grabbing window height
304 to 485	320	236 to 243	240
486 to 607	512	244 to 475	288
608 to 729	640	476 to 571	480
730 to 972	768	572 to 595	576
973 to 1215	1024	596 to 995	600
1216 and more	1280	996 to 1019	1000
		1020 and more	1024

Do not use STD for smaller grabbing windows.

The WindowX_Px and WindowY_Ln parameters are adjusted to the above-mentioned values.

Thereafter, the user is allowed to readjust the grabbing window position by amending OffsetX_Px and OffsetY_Ln to non-zero values.

The grabber's sampling frequency, which can differ from the camera's pixel clock frequency when analog or master synchronization is used, remains unchanged when GrabWindow is set to STD.