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overlay image widget constructor with Rect

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This commit is contained in:
ozantonkal 2013-07-22 16:12:22 +02:00
parent 540f9a67f3
commit 27f5cd2afd
2 changed files with 15 additions and 4 deletions
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2
modules/viz/include/opencv2/viz/widgets.hpp
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@ -147,7 +147,7 @@ namespace cv
class CV_EXPORTS ImageOverlayWidget : public Widget2D
{
public:
ImageOverlayWidget(const Mat &image, const Point2i &pos);
ImageOverlayWidget(const Mat &image, const Rect &rect);
void setImage(const Mat &image);

17
modules/viz/src/shape_widgets.cpp
View File

@ -622,7 +622,7 @@ struct cv::viz::ImageOverlayWidget::CopyImpl
}
};
cv::viz::ImageOverlayWidget::ImageOverlayWidget(const Mat &image, const Point2i &pos)
cv::viz::ImageOverlayWidget::ImageOverlayWidget(const Mat &image, const Rect &rect)
{
CV_Assert(!image.empty() && image.depth() == CV_8U);
@ -641,14 +641,25 @@ cv::viz::ImageOverlayWidget::ImageOverlayWidget(const Mat &image, const Point2i
flipFilter->SetInputConnection(vtk_image->GetProducerPort());
flipFilter->Update();
// Scale the image based on the Rect
vtkSmartPointer<vtkTransform> transform = vtkSmartPointer<vtkTransform>::New();
transform->Scale(double(image.cols)/rect.width,double(image.rows)/rect.height,1.0);
vtkSmartPointer<vtkImageReslice> image_reslice = vtkSmartPointer<vtkImageReslice>::New();
image_reslice->SetResliceTransform(transform);
image_reslice->SetInputConnection(flipFilter->GetOutputPort());
image_reslice->SetOutputDimensionality(2);
image_reslice->InterpolateOn();
image_reslice->AutoCropOutputOn();
vtkSmartPointer<vtkImageMapper> imageMapper = vtkSmartPointer<vtkImageMapper>::New();
imageMapper->SetInputConnection(flipFilter->GetOutputPort());
imageMapper->SetInputConnection(image_reslice->GetOutputPort());
imageMapper->SetColorWindow(255); // OpenCV color
imageMapper->SetColorLevel(127.5);
vtkSmartPointer<vtkActor2D> actor = vtkSmartPointer<vtkActor2D>::New();
actor->SetMapper(imageMapper);
actor->SetPosition(pos.x, pos.y);
actor->SetPosition(rect.x, rect.y);
WidgetAccessor::setProp(*this, actor);
}