diff --git a/build2/qt/HGScannerLib/HGScannerLib.def b/build2/qt/HGScannerLib/HGScannerLib.def
index ffe40ebe..f26ddeec 100644
--- a/build2/qt/HGScannerLib/HGScannerLib.def
+++ b/build2/qt/HGScannerLib/HGScannerLib.def
@@ -2,9 +2,11 @@ LIBRARY
 
 EXPORTS
 
+HGLib_MemoryCopy
 HGLib_LoadImage
 HGLib_GetImageData
 HGLib_GetImageInfo
+HGLib_GetImageDpi
 HGLib_SaveImage
 HGLib_ReleaseImage
 HGLib_InitDevice
diff --git a/doc/scannerlib/新版SDK接口说明.doc b/doc/scannerlib/新版SDK接口说明.doc
index 35923100..579a88f1 100644
Binary files a/doc/scannerlib/新版SDK接口说明.doc and b/doc/scannerlib/新版SDK接口说明.doc differ
diff --git a/doc/scannerlib/新版SDK接口说明.pdf b/doc/scannerlib/新版SDK接口说明.pdf
index 01b6d139..cc75c304 100644
Binary files a/doc/scannerlib/新版SDK接口说明.pdf and b/doc/scannerlib/新版SDK接口说明.pdf differ
diff --git a/sdk/scannerlib/HGScannerLib.cpp b/sdk/scannerlib/HGScannerLib.cpp
index 48f81a23..5d40d739 100644
--- a/sdk/scannerlib/HGScannerLib.cpp
+++ b/sdk/scannerlib/HGScannerLib.cpp
@@ -18,6 +18,17 @@ struct HGLibSaveImageParam_V1
 };
 #pragma pack(pop)
 
+HGBool HGAPI HGLib_MemoryCopy(HGVoid *dest, const HGVoid *src, HGUInt size)
+{
+    if (NULL == dest || NULL == src || 0 == size)
+    {
+        return HGFALSE;
+    }
+
+    memcpy(dest, src, size);
+    return HGTRUE;
+}
+
 HGLibImage HGAPI HGLib_LoadImage(const HGChar* filePath)
 {
 	if (NULL == filePath)
@@ -63,6 +74,17 @@ HGBool HGAPI HGLib_GetImageInfo(HGLibImage image, HGLibImageInfo* imageInfo)
 	return HGTRUE;
 }
 
+HGBool HGAPI HGLib_GetImageDpi(HGLibImage image, HGUInt *xDpi, HGUInt *yDpi)
+{
+    if (NULL == image || NULL == xDpi || NULL == yDpi)
+    {
+        return HGFALSE;
+    }
+
+    HGBase_GetImageDpi((HGImage)image, xDpi, yDpi);
+    return HGTRUE;
+}
+
 HGBool HGAPI HGLib_SaveImage(HGLibImage image, const HGChar* savePath, const HGLibSaveImageParam* saveParam)
 {
 	if (NULL == image || NULL == savePath)
diff --git a/sdk/scannerlib/HGScannerLib.h b/sdk/scannerlib/HGScannerLib.h
index 11f188da..6b44a5bf 100644
--- a/sdk/scannerlib/HGScannerLib.h
+++ b/sdk/scannerlib/HGScannerLib.h
@@ -509,6 +509,9 @@ typedef void (HGAPI *HGLibDeviceScanEventFunc)(HGLibDevice device, HGUInt event,
 */
 typedef void (HGAPI *HGLibDeviceScanImageFunc)(HGLibDevice device, HGLibImage image, HGPointer param);
 
+/* 内存拷贝 */
+HGEXPORT HGBool HGAPI HGLib_MemoryCopy(HGVoid *dest, const HGVoid *src, HGUInt size);
+
 /* 加载图像 */
 HGEXPORT HGLibImage HGAPI HGLib_LoadImage(const HGChar *filePath);
 
@@ -518,6 +521,9 @@ HGEXPORT HGByte* HGAPI HGLib_GetImageData(HGLibImage image);
 /* 获取图像信息 */
 HGEXPORT HGBool HGAPI HGLib_GetImageInfo(HGLibImage image, HGLibImageInfo* imageInfo);
 
+/* 获取图像DPI */
+HGEXPORT HGBool HGAPI HGLib_GetImageDpi(HGLibImage image, HGUInt *xDpi, HGUInt *yDpi);
+
 /* 保存图像 */
 HGEXPORT HGBool HGAPI HGLib_SaveImage(HGLibImage image, const HGChar* savePath, const HGLibSaveImageParam* saveParam);
 
@@ -587,4 +593,4 @@ HGEXPORT HGBool HGAPI HGLib_StopDeviceScanAsyn(HGLibDevice device);
 /* 获取设备操作码（在调用设备操作函数以后） */
 HGEXPORT HGInt HGAPI HGLib_GetDeviceOperateCode(HGLibDevice device);
 
-#endif /* __HGSCANNERLIB_H__ */
\ No newline at end of file
+#endif /* __HGSCANNERLIB_H__ */