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 24.02\Sample Programs
\[LANGUAGE] samples\Matching and Measurement\EasyObjectInertia

Purpose

This sample program demonstrates how to:

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Find blobs (objects or holes that have the same gray level range) in the image.

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Keep only the blobs whose area is in a given range.

Code highlights

Define an image encoder to encode an image (m_Image) into an object ECodedImage2 (m_CodedImage).

EImageEncoder encoder;
encoder.Encode(m_Image, m_CodedImage);

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);

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);

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);