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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 (AVS)

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 the InspectionPacket data type.
From the Project explorer window create a new Worker Task called SaveLastImage.
Add the Queue_Push filter to the main program's PROCESSING section and assign it the SavingQueue queue.
Right click on the inValue of the Queue_Push filter and select "Expand Structure Fields".
Connect created inputs using the following scheme:
- Connect the outImage output of the EnumerateImages filter with the inValue.Image input of the Queue_Push filter,
- Connect the outMatch output of the LocateSingleObject_Edges1 filter with the inValue.Rectangle input of the Queue_Push filter,
- Connect the outCircle output of the first FitCircleToEdges filter with the inValue.Circle1 input of the Queue_Push filter,
- Connect the outCircle output of the the second FitCircleToEdges filter with the inValue.Circle2 input of the Queue_Push filter,
- Connect the outConnectingSegment output of the first PointToPointDistance filter with the inValue.Segment1 input of the Queue_Push filter,
- Connect the outArc output of the first FitArcToEdges filter with the inValue.Arc1 input of the Queue_Push filter,
- Connect the outArc output of the second FitArcToEdges filter with the inValue.Arc2 input of the Queue_Push filter,
- Connect the outConnectingSegment output of the the second PointToPointDistance filter with the inValue.Segment2 input of the Queue_Push filter.
Go to the SaveLastImage Worker Task macrofilter.
In the ACQUIRE section add the Queue_Pop and the Loop filters.
In the PROCESS section add following filters in specified order: the DrawRectangles_SingleColor, the DrawCircles_SingleColor, the DrawCircles_SingleColor, the DrawSegments_SingleColor, the DrawArcs_SingleColor, the DrawArcs_SingleColor, the DrawSegments_SingleColor and the SaveImage.
Right click on the outValues of the Queue_Pop filter, select the PropertyOutput and check all visible outputs.
Connect created outputs by following the scheme in the image below.
Set the 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
	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.
	DrawCircles_SingleColor	Draws circles on an image with a single color.
	EnumerateImages	Emulates image acquisition with images stored on disk.
	DrawArcs_SingleColor	Draws arcs on an image with a single color.
	DrawRectangles_SingleColor	Draws rectangles on an image with a single color.
	Loop	Put this filter into a task that should have a loop, but does not have any other loop generators (e.g. GrabImage).
	PointToPointDistance	Measures the distance between two points.
	FitArcToEdges	Precise detection of an arciform edge, whose rough location is known beforehand.
	FitCircleToEdges	Precise detection of a circular object or hole, whose rough location is known beforehand.
	DrawSegments_SingleColor	Draws segments on an image with a single color.