WinForm使用Python.Net调用Yolov8将图像显示在pictureBox控件上.

前面就是Yolov8常见的目标识别代码, 由于跟业务有关太多就不贴出来了. 主要就是下面这部分,

 

 

cv2.VideoCapture(video_path);

dynamic result = cap.read();
bool success = (bool)result[0];
dynamic frame = result[1];

// 对当前帧进行目标检测
dynamic results = model.track(frame, persist: true);

// 可视化检测结果，调整边框宽度和文字大小
dynamic annotated_frame = results[0].plot(line_width: 1, font_size: 0.5, conf: false, labels: false);

int width = annotated_frame.shape[1];
int height = annotated_frame.shape[0];

// 获取数组内存信息 这种做法只需要0-1ms处理一帧
dynamic arrayInterface = annotated_frame.__array_interface__;//numpy自带属性
dynamic data_info = arrayInterface["data"];
long address = (long)data_info[0]; // 将 Python int 转换为 long
IntPtr ptr = new IntPtr(address);
int stride = width * 3; // 24bpp RGB format

byte[] imageData = new byte[height * stride];
System.Runtime.InteropServices.Marshal.Copy(ptr, imageData, 0, imageData.Length);

var bitmap = new Bitmap(width, height, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
var bitmapData = bitmap.LockBits(
    new Rectangle(0, 0, width, height),
    System.Drawing.Imaging.ImageLockMode.WriteOnly,
    System.Drawing.Imaging.PixelFormat.Format24bppRgb
);

System.Runtime.InteropServices.Marshal.Copy(imageData, 0, bitmapData.Scan0, imageData.Length);
bitmap.UnlockBits(bitmapData);

st.Stop();
var trasfer = st.ElapsedMilliseconds + "ms";

st.Restart();
UpdateUIOnNewThread(bitmap);
st.Stop();
var update = st.ElapsedMilliseconds + "ms";

/*
    0: 640x384 106 cans, 47.3ms
    Speed: 1.6ms preprocess, 47.3ms inference, 1.4ms postprocess per image at shape (1, 3, 640, 384)
    1ms    0ms
 */

        // 在非UI线程中调用此方法更新UI
        private void UpdateUIOnNewThread(Bitmap bitmap)
        {
            if (this.InvokeRequired)
            {
                // 如果当前线程不是UI线程，使用Invoke将操作封送到UI线程
                this.Invoke(new Action(() =>
                {
                    // 这里可以安全地操作UI控件
                    pictureBox1.Image = bitmap;
                }));
            }
            else
            {
                // 如果已经在UI线程中，直接执行
                pictureBox1.Image = bitmap;
            }
        }