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   源码介绍

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人脸检测

参照原吗

using FaceDiscern.AFD;
using FaceDiscern.Tools;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows.Forms;

namespace FaceDiscern
{
    public partial class FrmSingleImg : Form
    {
        //int detectSize = 40 * 1024 * 1024;
        int detectSize = 800 * 1024 * 1024;
        int nScale = 16;
        int nMaxFaceNum = 10;
        IntPtr detectEngine = IntPtr.Zero;

        string appId = "8AfCENQF8J3FmW7zFUks4JejnbtE4tNUjPsNXxmNtfsU";
        string sdkFDKey = "E55tWjN63WiwSF7RqG4pykULS2z1CuCMYJYE7PK2vzz9";
        public FrmSingleImg()
        {
            InitializeComponent();
            IntPtr pMem = Marshal.AllocHGlobal(detectSize);

            int retCode = AFDFunction.AFD_FSDK_InitialFaceEngine(appId, sdkFDKey, pMem, detectSize, ref detectEngine, (int)AFD_FSDK_OrientPriority.AFD_FSDK_OPF_0_HIGHER_EXT, nScale, nMaxFaceNum);
            if (retCode != 0)
            {
                MessageBox.Show("引擎初始化失败:错误码为:"   retCode);
                this.Close();
            }
        }

        private void FrmMain_Load(object sender, EventArgs e)
        {
        }

        private void btnOpenImg_Click(object sender, EventArgs e)
        {
            OpenFileDialog openFile = new OpenFileDialog();
            openFile.Filter = "图片文件|*.bmp;*.jpg;*.jpeg;*.png|所有文件|*.*;";
            openFile.Multiselect = false;
            openFile.FileName = "";
            if (openFile.ShowDialog() == DialogResult.OK)
            {
                Image image = Image.FromFile(openFile.FileName);
                var bitmap = new Bitmap(image);
                imgBox.Image = bitmap;
                //TODO:完成下面的方法
                //checkAndMarkFace(imgBox.Image);
                int width = 0;
                int height = 0;
                int pitch = 0;
                byte[] imageData = readBmp(bitmap, ref width, ref height, ref pitch);
                IntPtr imageDataPtr = Marshal.AllocHGlobal(imageData.Length);
                Marshal.Copy(imageData, 0, imageDataPtr, imageData.Length);

                ASVLOFFSCREEN offInput = new ASVLOFFSCREEN();
                offInput.u32PixelArrayFormat = 513;
                offInput.ppu8Plane = new IntPtr[4];
                offInput.ppu8Plane[0] = imageDataPtr;
                offInput.i32Width = width;
                offInput.i32Height = height;
                offInput.pi32Pitch = new int[4];
                offInput.pi32Pitch[0] = pitch;

                IntPtr offInputPtr = Marshal.AllocHGlobal(Marshal.SizeOf(offInput));
                Marshal.StructureToPtr(offInput, offInputPtr, false);

                AFD_FSDK_FACERES faceRes = new AFD_FSDK_FACERES();

                IntPtr faceResPtr = Marshal.AllocHGlobal(Marshal.SizeOf(faceRes));

                int detectResult = AFDFunction.AFD_FSDK_StillImageFaceDetection(detectEngine, offInputPtr, ref faceResPtr);

                faceRes = (AFD_FSDK_FACERES)Marshal.PtrToStructure(faceResPtr, typeof(AFD_FSDK_FACERES));
                #region 原
                //MRECT rect = (MRECT)Marshal.PtrToStructure(faceRes.rcFace, typeof(MRECT));

                //Image imgResult = CutFace(bitmap, rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top);

                //imgHead.Image = imgResult;

                //imgBox.Image = DrawRectangleInPicture(imgBox.Image, new Point(rect.left, rect.top), new Point(rect.right, rect.bottom), Color.Red, 2, DashStyle.Dash);
                #endregion

                #region 修改
                MRECT[] rectArr = new MRECT[faceRes.nFace];
                long longPtr = faceRes.rcFace.ToInt64();
                for (int i = 0; i < rectArr.Length; i  )
                {
                    IntPtr rectPtr = new IntPtr(longPtr);
                    var a = Marshal.PtrToStructure(rectPtr, typeof(MRECT));
                    var b = (MRECT)a;
                    rectArr[i] = b;
                    longPtr  = Marshal.SizeOf(typeof(MRECT));
                }
                imgBox.Image = DrawRectangleInPicture2(imgBox.Image, rectArr, Color.Red, 2, DashStyle.Dash);
                if (rectArr.Length > 0)
                {
                    MRECT rect = rectArr[0];
                    Image imgResult = CutFace(bitmap, rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top);
                    imgHead.Image = imgResult;
                }
                else
                {
                    imgHead.Image = null;
                }
                #endregion
            }
        }

        private byte[] readBmp(Bitmap image, ref int width, ref int height, ref int pitch)
        {
            //将Bitmap锁定到系统内存中,获得BitmapData
            BitmapData data = image.LockBits(new Rectangle(0, 0, image.Width, image.Height), ImageLockMode.ReadOnly, PixelFormat.Format24bppRgb);
            //位图中第一个像素数据的地址。它也可以看成是位图中的第一个扫描行
            IntPtr ptr = data.Scan0;
            //定义数组长度
            int soureBitArrayLength = data.Height * Math.Abs(data.Stride);
            byte[] sourceBitArray = new byte[soureBitArrayLength];
            //将bitmap中的内容拷贝到ptr_bgr数组中
            Marshal.Copy(ptr, sourceBitArray, 0, soureBitArrayLength); 
            width = data.Width;
            height = data.Height;
            pitch = Math.Abs(data.Stride);

            int line = width * 3;
            int bgr_len = line * height;
            byte[] destBitArray = new byte[bgr_len];
            for (int i = 0; i < height;   i)
            {
                Array.Copy(sourceBitArray, i * pitch, destBitArray, i * line, line);
            }
            pitch = line;
            image.UnlockBits(data);
            return destBitArray;
        }

        public static Bitmap CutFace(Bitmap srcImage, int StartX, int StartY, int iWidth, int iHeight)
        {
            if (srcImage == null)
            {
                return null;
            }
            int w = srcImage.Width;
            int h = srcImage.Height;
            if (StartX >= w || StartY >= h)
            {
                return null;
            }
            if (StartX   iWidth > w)
            {
                iWidth = w - StartX;
            }
            if (StartY   iHeight > h)
            {
                iHeight = h - StartY;
            }
            try
            {
                Bitmap bmpOut = new Bitmap(iWidth, iHeight, PixelFormat.Format24bppRgb);
                Graphics g = Graphics.FromImage(bmpOut);
                g.DrawImage(srcImage, new Rectangle(0, 0, iWidth, iHeight), new Rectangle(StartX, StartY, iWidth, iHeight), GraphicsUnit.Pixel);
                g.Dispose();
                return bmpOut;
            }
            catch
            {
                return null;
            }
        }
        private Image DrawRectangleInPicture(Image bmp, Point p0, Point p1, Color RectColor, int LineWidth, DashStyle ds)
        {
            if (bmp == null) return null;
            Graphics g = Graphics.FromImage(bmp);
            Brush brush = new SolidBrush(RectColor);
            Pen pen = new Pen(brush, LineWidth);
            pen.DashStyle = ds;
            g.DrawRectangle(pen, new Rectangle(p0.X, p0.Y, Math.Abs(p0.X - p1.X), Math.Abs(p0.Y - p1.Y)));
            g.Dispose();
            return bmp;
        }

        private Image DrawRectangleInPicture2(Image bmp, MRECT[] rectArr, Color RectColor, int LineWidth, DashStyle ds)
        {
            if (bmp == null) return null;
            Graphics g = Graphics.FromImage(bmp);
            Brush brush = new SolidBrush(RectColor);
            Pen pen = new Pen(brush, LineWidth);
            pen.DashStyle = ds;
            for (int i = 0; i < rectArr.Length; i  )
            {
                Point p0 = new Point(rectArr[i].left, rectArr[i].top);
                Point p1 = new Point(rectArr[i].right, rectArr[i].bottom);
                g.DrawRectangle(pen, new Rectangle(p0.X, p0.Y, Math.Abs(p0.X - p1.X), Math.Abs(p0.Y - p1.Y)));

            }
            g.Dispose();
            return bmp;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            OpenFileDialog openFile = new OpenFileDialog();
            openFile.Filter = "图片文件|*.bmp;*.jpg;*.jpeg;*.png|所有文件|*.*;";
            openFile.Multiselect = false;
            openFile.FileName = "";
            if (openFile.ShowDialog() == DialogResult.OK)
            {
                Image image = Image.FromFile(openFile.FileName);
                var bitmap = new Bitmap(image);
                imgBox.Image = bitmap;
                //TODO:完成下面的方法
                //checkAndMarkFace(imgBox.Image);
                int width = 0;
                int height = 0;
                int pitch = 0;
                byte[] imageData = readBmp(bitmap, ref width, ref height, ref pitch);

                //imgHead.Image = ImgHelper.ToGrayBitmap2(imageData, width, height);
                var img = ImgHelper.ToGrayBitmap2(imageData, width, height);
                imgBox.Image = img;

                return;

                IntPtr imageDataPtr = Marshal.AllocHGlobal(imageData.Length);
                Marshal.Copy(imageData, 0, imageDataPtr, imageData.Length);

                ASVLOFFSCREEN offInput = new ASVLOFFSCREEN();
                offInput.u32PixelArrayFormat = 513;
                offInput.ppu8Plane = new IntPtr[4];
                offInput.ppu8Plane[0] = imageDataPtr;
                offInput.i32Width = width;
                offInput.i32Height = height;
                offInput.pi32Pitch = new int[4];
                offInput.pi32Pitch[0] = pitch;

                IntPtr offInputPtr = Marshal.AllocHGlobal(Marshal.SizeOf(offInput));
                Marshal.StructureToPtr(offInput, offInputPtr, false);

                AFD_FSDK_FACERES faceRes = new AFD_FSDK_FACERES();

                IntPtr faceResPtr = Marshal.AllocHGlobal(Marshal.SizeOf(faceRes));

                int detectResult = AFDFunction.AFD_FSDK_StillImageFaceDetection(detectEngine, offInputPtr, ref faceResPtr);

                faceRes = (AFD_FSDK_FACERES)Marshal.PtrToStructure(faceResPtr, typeof(AFD_FSDK_FACERES));
                

                #region 修改
                MRECT[] rectArr = new MRECT[faceRes.nFace];
                long longPtr = faceRes.rcFace.ToInt64();
                for (int i = 0; i < rectArr.Length; i  )
                {
                    IntPtr rectPtr = new IntPtr(longPtr);
                    var a = Marshal.PtrToStructure(rectPtr, typeof(MRECT));
                    var b = (MRECT)a;
                    rectArr[i] = b;
                    longPtr  = Marshal.SizeOf(typeof(MRECT));
                }
                imgBox.Image = DrawRectangleInPicture2(imgBox.Image, rectArr, Color.Red, 2, DashStyle.Dash);
                if (rectArr.Length > 0)
                {
                    MRECT rect = rectArr[0];
                    Image imgResult = CutFace(bitmap, rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top);
                    imgHead.Image = imgResult;
                }
                else
                {
                    imgHead.Image = null;
                }
                #endregion
            }
        }
    }
}