scannerlib增加获取ocr字符串功能

build2/qt/HGScannerLib/HGScannerLib.def

@@ -9,6 +9,8 @@ HGLib_GetImageInfo
 HGLib_GetImageDpi
 HGLib_SaveImage
 HGLib_ReleaseImage
+HGLib_GetOcrText
+HGLib_ReleaseOcrText
 HGLib_InitDevice
 HGLib_DeinitDevice
 HGLib_GetDeviceNameList

sdk/scannerlib/HGScannerLib.cpp

@@ -151,6 +151,66 @@ HGBool HGAPI HGLib_ReleaseImage(HGLibImage image)
 	return HGTRUE;
 }
 
+HGChar* HGAPI HGLib_GetOcrText(HGLibImage image)
+{
+    if (NULL == image)
+    {
+        return NULL;
+    }
+
+    std::string strText;
+
+    HGOCRMgr ocrMgr = NULL;
+    HGImgProc_CreateOCRMgr(HGIMGPROC_OCRALGO_HANVON, &ocrMgr);
+    if (NULL != ocrMgr)
+    {
+        HGOCRRet ocrRet = NULL;
+        HGImgProc_ImageOCR(ocrMgr, (HGImage)image, &ocrRet);
+        if (NULL != ocrRet)
+        {
+            HGUInt blockCount = 0;
+            HGImgProc_GetOCRRetBlockCount(ocrRet, &blockCount);
+            for (HGUInt i = 0; i < blockCount; ++i)
+            {
+                const HGChar* text = NULL;
+                HGImgProc_GetOCRRetBlockText(ocrRet, i, &text);
+                strText += StdStringToUtf8(text);
+                if (i != blockCount - 1)
+                    strText += "\n";
+            }
+
+            HGImgProc_DestroyOCRRet(ocrRet);
+        }
+
+        HGImgProc_DestroyOCRMgr(ocrMgr);
+    }
+
+    if (strText.empty())
+    {
+        return NULL;
+    }
+
+    HGChar* ocrText = (HGChar*)malloc(strText.size() + 1);
+    if (NULL == ocrText)
+    {
+        return NULL;
+    }
+
+    strcpy(ocrText, strText.c_str());
+    return ocrText;
+}
+
+HGBool HGAPI HGLib_ReleaseOcrText(HGChar* ocrText)
+{
+    if (NULL == ocrText)
+    {
+        return HGFALSE;
+    }
+
+    free(ocrText);
+    return HGTRUE;
+}
+
 HGBool HGAPI HGLib_InitDevice(HGLibDeviceHotPlugEventFunc func, HGPointer param)
 {
 	return HGLibDeviceImpl::Init(func, param);

sdk/scannerlib/HGScannerLib.h

@@ -542,6 +542,12 @@ HGEXPORT HGBool HGAPI HGLib_SaveImage(HGLibImage image, const HGChar* savePath,
 /* 释放图像 */
 HGEXPORT HGBool HGAPI HGLib_ReleaseImage(HGLibImage image);
 
+/* 获取OCR文本 */
+HGEXPORT HGChar* HGAPI HGLib_GetOcrText(HGLibImage image);
+
+/* 销毁OCR文本 */
+HGEXPORT HGBool HGAPI HGLib_ReleaseOcrText(HGChar* ocrText);
+
 /* 初始化扫描仪 */
 HGEXPORT HGBool HGAPI HGLib_InitDevice(HGLibDeviceHotPlugEventFunc func, HGPointer param);
 

test/scannerlib/huagao/test.py

@@ -94,6 +94,19 @@ ImageParam.tiffJpegQuality = 80
 ImageParam.ocr = 0
 Ret = HGLib_SaveImage(Image, c_char_p(b"2.jpg"), pointer(ImageParam))
 
+#OCR
+HGLib_GetOcrText = Objdll.HGLib_GetOcrText
+HGLib_GetOcrText.argtypes = [ctypes.c_void_p]
+HGLib_GetOcrText.restype = ctypes.c_void_p
+OcrText = HGLib_GetOcrText(Image)
+if OcrText:
+    print(ctypes.string_at(OcrText).decode('utf-8'));
+
+HGLib_ReleaseOcrText = Objdll.HGLib_ReleaseOcrText
+HGLib_ReleaseOcrText.argtypes = [ctypes.c_void_p]
+HGLib_ReleaseOcrText.restype = ctypes.c_int
+Ret = HGLib_ReleaseOcrText(OcrText)
+
 #释放图像资源
 HGLib_ReleaseImage = Objdll.HGLib_ReleaseImage
 HGLib_ReleaseImage.argtypes = [ctypes.c_void_p]
@@ -102,7 +115,7 @@ Ret = HGLib_ReleaseImage(Image)
 
 #设备热拔插回调事件
 def HGLibDeviceHotPlugEventFunc(event: c_uint, deviceName: c_char_p, param: c_void_p):
-    print(deviceName)
+    print(deviceName.decode('utf-8'))
     return
 
 #初始化操作
@@ -196,12 +209,14 @@ Ret = HGLib_SetDeviceParam(Device, 51, byref(DevParam))
 DevParam = ctypes.c_double(0.1)
 Ret = HGLib_SetDeviceParam(Device, 52, byref(DevParam))
 
+bStop = False
 
 #扫描事件回调
-def HGLibDeviceScanEventFunc(device: c_void_p, event: c_uint, err: c_int, info: c_char_p, param: c_void_p):
+def HGLibDeviceScanEventFunc(device: c_void_p, event: c_uint, err: c_int, info: ctypes.c_char_p, param: c_void_p):
-    s_info=info
     global bStop
-    print("event code",event,"     event info:",s_info)
+    print("event code:", event)
+    if info:
+        print("event info:", info.decode('utf-8'))
     if event == 2:#HGLIB_DEVSCAN_EVENT_END 扫描停止
         bStop=True
         print("bStop true")