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Edge-detection effect

  • Článek

Filters out the content of an image, leaving lines at the edges of contrasting sections of the image.

The CLSID for this effect is CLSID_D2D1EdgeDetection.

Example image

example of effect output

Sample code

ComPtr<ID2D1Effect> edgeDetectionEffect;
m_d2dContext->CreateEffect(CLSID_D2D1EdgeDetection, &edgeDetectionEffect);
 
edgeDetectionEffect->SetInput(0, bitmap);
edgeDetectionEffect->SetValue(D2D1_EDGEDETECTION_PROP_STRENGTH, 0.5f);
edgeDetectionEffect->SetValue(D2D1_EDGEDETECTION_PROP_BLUR_RADIUS, 0.0f);
edgeDetectionEffect->SetValue(D2D1_EDGEDETECTION_PROP_MODE, D2D1_EDGEDETECTION_MODE_SOBEL);
edgeDetectionEffect->SetValue(D2D1_EDGEDETECTION_PROP_OVERLAY_EDGES, false);
edgeDetectionEffect->SetValue(D2D1_EDGEDETECTION_PROP_ALPHA_MODE, D2D1_ALPHA_MODE_PREMULTIPLIED);
 
m_d2dContext->BeginDraw();
m_d2dContext->DrawImage(edgeDetectionEffect.Get());
m_d2dContext->EndDraw();

Effect properties

The properties for the edge detection effect are defined by the D2D1_EDGEDETECTION_PROP enumeration.

Requirements

Requirement Value
Minimum supported client Windows 10 [desktop apps | Windows Store apps]
Minimum supported server Windows 10 [desktop apps | Windows Store apps]
Header d2d1effects_2.h
Library d2d1.lib, dxguid.lib