Background Substraction

The Background substraction correction is a simple operation you can active when a detector has some dark-current noise independent of the dose of photons it will receive. To set the correction you must provide to the device a background image file (setBackgroundImage command) and then start the correction (start command). Instead of providing an external image file you can simply ask the device to use an image taken. Call the command takeNextAcquistionAsBackground to set the internal background image from an acquisition image. One can apply an extra offset correction using the offset attribute value.

Properties

This device has no property.

Attributes

Attribute name	RW	Type	Description
delete_dark_after_read	rw	DevBoolean	If true the device will delete the file after reading Can be useful to not keep obsolete dark image file after use
offset	rw	DevLong	Set a offset level to be applied in addition to the background correction
RunLevel	rw	DevLong	Run level in the processing chain, from 0 to N
State	ro	State	OFF or ON (stopped or started)
Status	ro	DevString	“OFF” “ON” (stopped or started)

Commands

Command name	Arg. in	Arg. out	Description
Init	DevVoid	DevVoid	Do not use
setBackgroundImage	DevString	DevVoid	Full path of background image file
Start	DevVoid	DevVoid	Start the correction for next image
State	DevVoid	DevLong	Return the device state
Status	DevVoid	DevString	Return the device state as a string
Stop	DevVoid	DevVoid	Stop the correction after the next image
takeNextAcquisitionAsBackground	DevVoid	DevVoid	next taken image will replace the background