How to Display Image In Picturebox in VC++ from Iplimage and Mat

最新推荐文章于 2022-09-18 00:03:48 发布

转载最新推荐文章于 2022-09-18 00:03:48 发布 · 4.8k 阅读

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本文介绍如何将OpenCV的iplimage和Mat类型的数据展示到Windows Form应用中的PictureBox控件上，包括了从图像数据到PictureBox的转换过程。

Introduction

This tip/trick will be useful to OpenCV programmers, who wish to use Windows Form application under Visual C++. This tip helps programmers to use Windows function with OpenCV library. The following tip shows how to assigniplimage and mat variable to picturebox image.

Assign Iplimage to Picturebox Image

In this part, it shows how to assign iplimage to picturebox image. First of all, declare the frame pointer.Iplimage type.

Declare Iplimage variable:

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IplImage* frame;

Here. Create new Bitmap image from frame properties like width, height, widthstep. Set image data from frameimagedata.

Process the PictureBox.

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pictureBox1->Image  = gcnew System::Drawing::Bitmap
(frame->width,frame->height,frame->widthStep,
System::Drawing::Imaging::PixelFormat::Format24bppRgb,(System::IntPtr) frame->imageData);
pictureBox1->Refresh();

Assign Mat to Picturebox Image

In this part, it shows how to assign Mat to picturebox image. First of all, declare the frameDetected variable,Mat type.

Declare Mat variable.

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Mat frameDetected;

Here. Create graphics of picturebox. Then create new Bitmap image from frameDetected properties like cols, rows, step. Then create Rectangle with x and y with 0 value and width and height with picturebox height,width respectively. Then rectangle assign to previous initialized graphics object.

Process the PictureBox:

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System::Drawing::Graphics^ graphics2 = pictureBox3->CreateGraphics();
System::IntPtr ptr2(frameDetected.ptr());
System::Drawing::Bitmap^ b2  = gcnew System::Drawing::Bitmap(frameDetected.cols,
frameDetected.rows,frameDetected.step,System::Drawing::Imaging::PixelFormat::Format24bppRgb,ptr2);
System::Drawing::RectangleF rect2(0,0, pictureBox3->Width,pictureBox3->Height);
graphics2->DrawImage(b2,rect2);