eyemDecode.cs
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using Microsoft.Win32.SafeHandles;
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.Text.RegularExpressions;
using System.Threading.Tasks;
namespace CodeLibrary
{
public unsafe class EyemDecode
{
/// <summary>
/// 识别图像二维码
/// </summary>
/// <param name="bmap">需要手动释放这个bitmap</param>
/// <returns></returns>
public static List<CodeInfo> Decoder(ref Bitmap bmap,string file=null)
{
List<CodeInfo> codelist = new List<CodeInfo>();
try
{
//创建图像引用
EyemImage eyemImage;
BitmapData bitmapData = null;
if (file == null)
{
Rectangle rect = new Rectangle(0, 0, bmap.Width, bmap.Height);
bitmapData = bmap.LockBits(rect, ImageLockMode.ReadOnly, bmap.PixelFormat);
eyemImage = new EyemImage();
eyemImage.ucpImage = bitmapData.Scan0;
eyemImage.iWidth = rect.Width;
eyemImage.iHeight = rect.Height;
eyemImage.iChannel = 0;
}
else {
eyemImageRead(file, 3, out eyemImage);
}
//创建扫描区域
EyemRect eyemRect = new EyemRect();
eyemRect.iXs = 0;
eyemRect.iYs = 0;
eyemRect.iWidth = eyemImage.iWidth;
eyemRect.iHeight = eyemImage.iHeight;
string codeType = "QR_CODE|DATA_MATRIX";//QRCode
int ipNum;
EyemBarCode* tpResults;
DataCodeHandle hObject = null;
try
{
int result = eyemDetectAndDecode(eyemImage, eyemRect, "", codeType, out hObject, out tpResults, out ipNum, false, 11, 5, 128, 215);
HDLogUtil.info($"eyemDetectAndDecode:{result},ipNum:{ipNum}");
if (result != 0 || ipNum == 0)
return codelist;
for (int i = 0; i < ipNum; i++)
{
CodeInfo ci = new CodeInfo(Marshal.PtrToStringAnsi(tpResults[i].hText), tpResults[i].iCenterX, tpResults[i].iCenterY);
ci.CodeType = Marshal.PtrToStringAnsi(tpResults[i].hType);
codelist.Add(ci);
}
}
finally
{
if (hObject != null)
hObject.Dispose();
if (bitmapData!=null)
bmap.UnlockBits(bitmapData);
if (file != null)
eyemImageFree(eyemImage.ucpImage);
//bmap.Dispose();
}
}
catch (Exception ex)
{
HDLogUtil.error(ex.ToString());
}
//eyemImageFree(eyemImage.ucpImage);
return codelist;
}
//释放解码句柄
private class DataCodeHandle : SafeHandleZeroOrMinusOneIsInvalid
{
public DataCodeHandle() : base(true) { }
protected override bool ReleaseHandle()
{
return eyemDetectAndDecodeFree(handle);
}
}
[DllImport("eyemLib.dll", CharSet = CharSet.None, CallingConvention = CallingConvention.Cdecl)]
private static extern int eyemDetectAndDecode(EyemImage tpImage, EyemRect tpRoi, string fileName, string strCodeType, out DataCodeHandle hObject, out EyemBarCode* tpResults, out int ipNum, bool bUseNiBlack, int iBlockSize, int iRangeC, int iSymbolMin, int iSymbolMax, double dScaleUpAndDown=1, double dToleErr = 0.5, double dMinorStep = 1.0);
/// <summary>
/// 读取图像
/// </summary>
/// <param name="filename"></param>
/// <param name="iFalgs"></param>
/// <param name="ucpImage"></param>
/// <returns></returns>
[DllImport("eyemLib.dll", CharSet = CharSet.None, CallingConvention = CallingConvention.Cdecl)]
private static extern int eyemImageRead(string filename, int iFalgs, out EyemImage ucpImage);
/// <summary>
/// 释放图像资源
/// </summary>
/// <param name="ipImage"></param>
[DllImport("eyemLib.dll", CharSet = CharSet.None, CallingConvention = CallingConvention.Cdecl)]
private static extern void eyemImageFree(IntPtr ipImage);
//释放工具
[DllImport("eyemLib.dll", CharSet = CharSet.None, CallingConvention = CallingConvention.Cdecl)]
private static extern bool eyemDetectAndDecodeFree(IntPtr hObject);
[StructLayout(LayoutKind.Sequential)]
public struct EyemImage
{
public IntPtr ucpImage; // 地址
public int iWidth; // 图像内存 x 方向大小
public int iHeight; // 图像内存 y 方向大小
public int iChannel; // 图像通道数
}
[StructLayout(LayoutKind.Sequential)]
public struct EyemRect
{
public int iXs; // 起始点（左上角） x 坐标
public int iYs; // 起始点（左上角） y 坐标
public int iWidth; // x 方向大小（宽度）
public int iHeight; // y 方向大小（高度）
}
[StructLayout(LayoutKind.Sequential)]
public struct EyemBarCode
{
public double dAngle; // 角度
public int iCenterX; // y坐标
public int iCenterY; // y坐标
public IntPtr hType; // 码类型
public IntPtr hText; // 码内容
}
}
}