C#中OCR的靠谱方式

https://www.cnblogs.com/xuexz/p/17905030.html

注意：使用SpireOCR时要取消目标平台【首选32位】的勾选，否则会报错。

C# using PaddleOCRSharp;
using Spire.OCR;

namespace WinFormsApp
{
    public partial class Form1 : Form
    {
        public PaddleOCREngine engine;
        public Form1()
        {
            InitializeComponent();
            engine = CreateOCRParameter();// 这个只能引用一次，否则会出现内存一直增加的问题
        }

        #region SpireOCR
        private void SpireOCR_Click(object sender, EventArgs e)
        {
            textBox1.Text = "";
            this.openFileDialog1.FileName = "";
            this.openFileDialog1.Filter = "所有文件(*.*)|*.*";
            if (this.openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                OcrScanner scanner = new OcrScanner();
                scanner.Scan(this.openFileDialog1.FileName);
                scanner.Dispose();
                textBox1.Text = "SpireOCR识别结果：\r\n" + scanner.Text.ToString().Split("Evaluation")[0];
            }
        }
        #endregion

        #region PaddleOCRSharp
        public PaddleOCREngine CreateOCRParameter()
        {
            OCRParameter oCRParameter = new OCRParameter();
            oCRParameter.numThread = 6;//预测并发线程数
            oCRParameter.Enable_mkldnn = 1;//web部署该值建议设置为0,否则出错，内存如果使用很大，建议该值也设置为0.
            oCRParameter.cls = 1; //是否执行文字方向分类；默认false
            oCRParameter.det = 1;//是否开启方向检测，用于检测识别180旋转
            oCRParameter.use_angle_cls = 1;//是否开启方向检测，用于检测识别180旋转
            oCRParameter.det_db_score_mode = 1;//是否使用多段线，即文字区域是用多段线还是用矩形，
            oCRParameter.UnClipRatio = 8.6f;
            oCRParameter.MaxSideLen = 960;
            OCRModelConfig config = null;
            PaddleOCREngine engine = new PaddleOCREngine(config, oCRParameter);
            return engine;
        }

        private void PaddleOCRSharp_Click(object sender, EventArgs e)
        {
            textBox1.Text = "";
            this.openFileDialog1.FileName = "";
            this.openFileDialog1.Filter = "所有文件(*.*)|*.*";
            if (this.openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                OCRResult ocrResult = engine.DetectText(this.openFileDialog1.FileName);
                textBox1.Text = "PaddleOCRSharp识别结果：\r\n" + ocrResult.Text;
            }
        }
        #endregion
    }
}

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