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Parallel Image Saving

Aim

The task is to save the last image with drawn results.

Input

An image containing a gasket.

Output

Saved image with drawn results.

Hints

Read more about the original Gasket Inspection example here. In order to reduce the execution time, draw and save results using a Worker Task Macrofilter.

Labeling connections is explained in this article.

Solution (FIS)

Use the code from the Gasket Inspection example to prepare the inspection.
From the Project Explorer window create a new UserType named InspectionPacket. All the inputs, which need to be created, as well as their corresponding data types are shown in the image below.
From the Project explorer window create a new SavingQueue with InspectionPacket data type.
From the Project explorer window create a new Worker Task called SaveLastImage.
Add Queue_Push filter to the main program's PROCESSING section and assign it the SavingQueue queue.
Right click on the inValue of Queue_Push filter and select "Expand Structure Fields".
Connect created inputs using the following scheme:
- Connect outImage output of the EnumerateImages filter with the inValue.Image input of Queue_Push filter,
- Connect outMatch output of the LocateSingleObject_Edges1 filter with the inValue.Rectangle input of Queue_Push filter,
- Connect outCircle output of the first FitCircleToEdges filter with the inValue.Circle1 input of Queue_Push filter,
- Connect outCircle output of the the second FitCircleToEdges filter with the inValue.Circle2 input of Queue_Push filter,
- Connect outConnectingSegment output of the first PointToPointDistance filter with the inValue.Segment1 input of Queue_Push filter,
- Connect outArc output of the first FitArcToEdges filter with the inValue.Arc1 input of Queue_Push filter,
- Connect outArc output of the second FitArcToEdges filter with the inValue.Arc2 input of Queue_Push filter,
- Connect outConnectingSegment output of the the second PointToPointDistance filter with the inValue.Segment2 input of Queue_Push filter.
Go to the SaveLastImage Worker Task macrofilter.
In the ACQUIRE section add Queue_Pop and Loop filters.
In the PROCESS section add following filters in specified order: DrawRectangles_SingleColor, DrawCircles_SingleColor, DrawCircles_SingleColor, DrawSegments_SingleColor, DrawArcs_SingleColor, DrawArcs_SingleColor, DrawSegments_SingleColor and SaveImage.
Right click on outValues of the Queue_Pop filter, select PropertyOutput and check all visible outputs.
Connect created outputs by following the scheme in the image below.
Set inFile input of the SaveImage filter to LastResult.bmp.
Program is ready to use. In the current version, programs using worker tasks can be properly run only in the Run mode (F5).

Macrofilter Main

Used Filters

Icon	Name	Description
	DrawSegments_SingleColor	Draws segments on an image with a single color.
	DrawRectangles_SingleColor	Draws rectangles on an image with a single color.
	FitCircleToEdges	Precise detection of a circular object or hole, whose rough location is known beforehand.
	FitArcToEdges	Precise detection of an arciform edge, whose rough location is known beforehand.
	LocateSingleObject_Edges1	Detection of an object whose outlines are sharp and rigid. Often one of the first filters in a program.
	SaveImage	Saves an image to a file.
	Loop	Put this filter into a task that should have a loop, but does not have any other loop generators (e.g. GrabImage).
	EnumerateImages	Emulates image acquisition with images stored on disk.
	DrawArcs_SingleColor	Draws arcs on an image with a single color.
	DrawCircles_SingleColor	Draws circles on an image with a single color.
	PointToPointDistance	Measures the distance between two points.