EasyFindVectorLearn

Support

Required licenses

EasyFind

Recommended images

Any gray level image from the folder Sample Images\EasyFind

Location

[…]C:\Users\Public\Documents\Euresys\Open eVision 24.02\Sample Programs
\[LANGUAGE] samples\Matching and Measurement\EasyFindVectorLearn

C++:

C:\Users\Public\Documents\Euresys\Open eVision 24.02\Sample Programs\MsVc samples\Matching and Measurement\EasyFindVectorLearn
C#:

C:\Users\Public\Documents\Euresys\Open eVision 24.02\Sample Programs\MsVcs samples\Matching and Measurement\EasyFindVectorLearn
Qt:

C:\Users\Public\Documents\Euresys\Open eVision 24.02\Sample Programs\Qt samples\Matching and Measurement\EasyFindVectorLearn

Purpose

EasyFind learns then finds patterns inside images.

This sample program demonstrates how to:

□ Use EasyFind with vectorized learning patterns. In this mode, learning is done on collections of 2D geometrical shapes rather than rasterized patterns.
□ Open a DXF or Open eVision vector model with File > Open Model. Right-click to change the polarity of a transition.
□ Save the vector model with the edited polarity.
□ Learn the pattern with the button Learn.
□ Open a search image and find the pattern with the button Find .

Code highlights

1. Define a model as a collection of shapes. 
EVectorModel vectorModel;
2. Load the vector model from a file. 
vectorModel.Load(fileName);
3. Load the vector model from a DXF file. 
vectorModel.LoadDXF(fileName);
4. Set the scale of the vector model with respect to the search image. 
vectorModel.GetRoot().GetWorldShape()->SetScale(fScale);
5. Set the polarity of any shape in the vector model. 
shape.SetProperty(“polarity”,”direct”);
6. Learn a vector pattern. 
patternfinder.Learn(vectorModel);
7. Find the pattern that you previously learned inside the image.
► Retrieve the results as a vector of EFoundPatterns. 
std::vector<EFoundPattern> foundPatterns = patternfinder.Find(image);
8. Draw the vector model and show the polarity as arrows pointing from a dark to light transition. 
vectorModel.Draw(…);
9. Draw a found pattern in the same reference frame as the search image. 
foundPatterns[n].Draw(…);