EasyObjectInertia

Support

Required licenses

EasyObject

Recommended images

The images Washer and Target 1 from the folder Sample Images\EasyGauge

Location

[…]C:\Users\Public\Documents\Euresys\Open eVision 25.02\Sample Programs
\[LANGUAGE] samples\Matching and Measurement\EasyObjectInertia

Python: […]C:\Users\Public\Documents\Euresys\Open eVision 25.02\Sample Programs
\Python samples\Console samples\Matching and Measurement

C++:

C:\Users\Public\Documents\Euresys\Open eVision 25.02\Sample Programs\MsVc samples\Matching and Measurement\EasyObjectInertia
C#:

C:\Users\Public\Documents\Euresys\Open eVision 25.02\Sample Programs\MsVcs samples\Matching and Measurement\EasyObjectInertia
Qt:

C:\Users\Public\Documents\Euresys\Open eVision 25.02\Sample Programs\Qt samples\Matching and Measurement\EasyObjectInertia
VB.NET:

C:\Users\Public\Documents\Euresys\Open eVision 25.02\Sample Programs\MsVbNET samples\Matching and Measurement\EasyObjectInertia
Python

C:\Users\Public\Documents\Euresys\Open eVision 25.02\Sample Programs\Python samples\Console samples\Matching and Measurement
  These links work only if you installed the sample programs in the default folder together with Open eVision.

Purpose

This sample program demonstrates how to:

□ Find blobs (objects or holes that have the same gray level range) in the image.
□ Keep only the blobs whose area is in a given range.

Code highlights

1. Define an image encoder to encode an image (m_Image) into an object In a general content, the term object should be understood with the meaning of a class instance. In EasyObject, an object is a maximally-sized area of adjacent connected pixels belonging to the layer foreground. ECodedImage2 (m_CodedImage). 
EImageEncoder encoder;
encoder.Encode(m_Image, m_CodedImage);
2. Add the objects to an object selection object (EObjectSelection m_Selection). 
// Select all the objects from the coded image
m_Selection.Clear();
m_Selection.AddObjects(m_CodedImage);
3. Filter the selection of objects by removing all objects whose area is outside the range [50, 10 000]. 
// Remove objects too small or too large
m_Selection.RemoveUsingUnsignedIntegerFeature(EFeature_Area, 50, 10000, EDoubleThresholdMode_Outside);
4. Draw the selected objects and their ellipse of inertia with their diagonals. 
// Draw all the selected objects
CodedImage.Draw(hDC, selection);

// Draw the ellipses of inertia with their diagonals, using a red pen
const ERGBColor redPen(255, 0, 0);
CodedImage.DrawFeature(hDC, redPen, EDrawableFeature_Ellipse, selection, 1.0f, 1.0f, 0.0f, 0.0f, true);