using OpenCvSharp;
using OpenCvSharp.Blob;
using OpenCvSharp.Extensions;
using OpenCvSharp.XFeatures2D;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace AOI
{
    public class ImageUtil
    {
        public static Mat ToMat(Image image)
        {
            return BitmapConverter.ToMat(new Bitmap(image));
        }

        public static Image ToImage(Mat mat)
        {
            return BitmapConverter.ToBitmap(mat);
        }

        public static Mat GetGrayHist(Mat srcMat)
        {
            Mat grayMat = new Mat();
            Cv2.CvtColor(srcMat, grayMat, ColorConversionCodes.BGRA2GRAY);

            Mat[] mats = new Mat[] { grayMat };//一张图片，初始化为panda
            Mat hist = new Mat();//用来接收直方图
            int[] channels = new int[] { 0 };//一个通道,初始化为通道0
            int[] histsize = new int[] { 256 };//一个通道，初始化为256箱子
            Rangef[] range = new Rangef[1];//一个通道，值范围
            range[0].Start = 0.0F;//从0开始（含）
            range[0].End = 256.0F;//到256结束（不含）
            Mat mask = new Mat();//不做掩码
            Cv2.CalcHist(mats, channels, mask, hist, 1, histsize, range);//计算灰度图，dim为1 1维
            return hist;
        }

        }
}