基线:全量源码首提(D1 版本控制落地,含第一轮优化 B1-B4/A1/A4/缩放修复)

2026-10-01 22:15:22 +08:00
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+// ============================================================
+//  UmiOcrClient:Umi-OCR 本地 OCR 引擎(hiroi-sora/Umi-OCR,离线免费)
+//  · 前提:用户在本机运行 Umi-OCR 主程序,全局设置里开启 HTTP 服务(默认开启,端口 1224)
+//  · POST {BaseUrl}/api/ocr  application/json:
+//      { "base64": "<纯base64无前缀>", "options": { "data.format": "dict" } }
+//  · 响应: code=100 成功;data=[{ text, score, box:[[x,y]×4 左上/右上/右下/左下], end }]
+//          code=101 无文本(data 为原因字符串);其余 code 失败
+//  · 地址存 baidu_ocr.json 的 umi_url(OCR设置窗口写,默认 http://127.0.0.1:1224)
+//  · 本地引擎无需 API Key,IsConfigured 恒 true
+// ============================================================
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Drawing.Imaging;
+using System.IO;
+using System.Net;
+using System.Text;
+using System.Threading.Tasks;
+using System.Web.Script.Serialization;
+
+namespace pdfbt
+{
+    /// <summary>Umi-OCR 本地引擎客户端(单实例)。</summary>
+    internal sealed class UmiOcrClient
+    {
+        private readonly JavaScriptSerializer _json = new JavaScriptSerializer();
+        private string _baseUrl = "http://127.0.0.1:1224";
+
+        /// <summary>状态提示,接 OcrClient.StatusChanged。</summary>
+        public event Action<string> StatusChanged;
+
+        public bool IsConfigured
+        {
+            get { return true; }   // 本地引擎无需 Key
+        }
+
+        /// <summary>服务地址由 OcrClient 从 baidu_ocr.json 的 umi_url 注入(热更新)。</summary>
+        public void SetBaseUrl(string url)
+        {
+            url = (url == null ? "" : url.Trim());
+            if (url.Length == 0) url = "http://127.0.0.1:1224";
+            if (!url.StartsWith("http")) url = "http://" + url;
+            _baseUrl = url.TrimEnd('/');
+        }
+
+        /// <summary>识别一块位图 → 文本行列表(带位置)。JSON POST 到本机 Umi-OCR。</summary>
+        public Task<List<OcrItem>> RecognizeAsync(Bitmap crop, int timeoutMs)
+        {
+            if (crop == null || crop.Width <= 0 || crop.Height <= 0)
+                return Task.FromResult(new List<OcrItem>());
+
+            return Task.Factory.StartNew(() =>
+            {
+                var sw = System.Diagnostics.Stopwatch.StartNew();
+                var result = RequestAndParse(crop, timeoutMs);
+                Notify("Umi-OCR·" + result.Count + "条 " + sw.ElapsedMilliseconds + "ms");
+                return result;
+            });
+        }
+
+        private List<OcrItem> RequestAndParse(Bitmap crop, int timeoutMs)
+        {
+            // PNG base64(无 data: 前缀);PNG 保坐标精度,本地服务无 4MB 限制
+            string b64;
+            using (var ms = new MemoryStream())
+            {
+                crop.Save(ms, ImageFormat.Png);
+                b64 = Convert.ToBase64String(ms.ToArray());
+            }
+
+            string req = _json.Serialize(new Dictionary<string, object>
+            {
+                { "base64", b64 },
+                { "options", new Dictionary<string, object> { { "data.format", "dict" } } }
+            });
+
+            string body;
+            using (var wc = new WebClient())
+            {
+                wc.Encoding = Encoding.UTF8;
+                wc.Headers["Content-Type"] = "application/json";
+                wc.Proxy = null;   // 本地地址不走系统代理(配了代理会把 127.0.0.1 也代理走)
+                body = wc.UploadString(_baseUrl + "/api/ocr", "POST", req);
+            }
+
+            var resp = _json.Deserialize<Dictionary<string, object>>(body);
+            if (resp == null || !resp.ContainsKey("code"))
+                throw new Exception("Umi-OCR 返回解析失败");
+
+            int code;
+            int.TryParse(Convert.ToString(resp["code"]), out code);
+            if (code == 101)
+                return new List<OcrItem>();   // 无文本,不算错误
+            if (code != 100)
+                throw new Exception("Umi-OCR 错误 code=" + code + ": " +
+                    Convert.ToString(resp.ContainsKey("data") ? resp["data"] : ""));
+
+            var items = new List<OcrItem>();
+            var arr = resp.ContainsKey("data") ? resp["data"] as System.Collections.ArrayList : null;
+            if (arr != null)
+            {
+                foreach (Dictionary<string, object> w in arr)
+                {
+                    if (w == null) continue;
+                    var boxArr = w.ContainsKey("box") ? w["box"] as System.Collections.ArrayList : null;
+                    if (boxArr == null || boxArr.Count < 4) continue;
+                    var pts = new PointF[4];
+                    for (int i = 0; i < 4; i++)
+                    {
+                        var xy = boxArr[i] as System.Collections.ArrayList;
+                        float x, y;
+                        float.TryParse(Convert.ToString(xy != null && xy.Count > 0 ? xy[0] : "0"), out x);
+                        float.TryParse(Convert.ToString(xy != null && xy.Count > 1 ? xy[1] : "0"), out y);
+                        pts[i] = new PointF(x, y);
+                    }
+                    float score = 0.95f;
+                    if (w.ContainsKey("score"))
+                    {
+                        float sv;
+                        if (float.TryParse(Convert.ToString(w["score"]),
+                            System.Globalization.NumberStyles.Float,
+                            System.Globalization.CultureInfo.InvariantCulture, out sv)) score = sv;
+                    }
+                    items.Add(new OcrItem
+                    {
+                        Text = Convert.ToString(w.ContainsKey("text") ? w["text"] : ""),
+                        Box = pts,          // box 即发送图像素坐标(顺时针四点),与 OcrItem 语义一致
+                        Score = score
+                    });
+                }
+            }
+            return items;
+        }
+
+        private void Notify(string msg)
+        {
+            var h = StatusChanged;
+            if (h != null) h(msg);
+        }
+    }
+}