Support return Unicode escapes

modules/ANSFR/ANSFR.cpp

@@ -2379,7 +2379,7 @@ namespace ANSCENTER {
             END_TIMER(json_build, "JSON Build Time");
 
             START_TIMER(json_serialize);
-            std::string result = root.dump();
+            std::string result = root.dump(-1, ' ', true);
             END_TIMER(json_serialize, "JSON Serialize Time");
 
             END_TIMER(json_total, "JSON Conversion Total Time");
@@ -2416,7 +2416,7 @@ namespace ANSCENTER {
 
         root["results"] = detectedObjects;
 
-        return root.dump();  // or root.dump(4) for pretty-printed JSON with 4-space indent
+        return root.dump(-1, ' ', true);
     }
      
     // Validation helper methods

modules/ANSLPR/ANSLPR.cpp

@@ -434,7 +434,7 @@ namespace ANSCENTER {
 					{"kps", KeypointsToString(det.kps)}
 					});
 			}
-			return root.dump();
+			return root.dump(-1, ' ', true);
 		}
 		catch (const std::exception& e) {
 			this->_logger.LogFatal("ANSALPR::VectorDetectionToJsonString", e.what(), __FILE__, __LINE__);

modules/ANSOCR/ANSOCRBase.cpp

@@ -197,7 +197,7 @@ namespace ANSCENTER {
 					{"y", std::to_string(det.box.y)},
 					{"width", std::to_string(det.box.width)},
 					{"height", std::to_string(det.box.height)},
-					{"mask", ""},  // TODO: convert masks to comma separated string
+					{"mask", ""},
 					{"extra_info", det.extraInfo},
 					{"camera_id", det.cameraId},
 					{"polygon", PolygonToString(det.polygon)},
@@ -205,7 +205,8 @@ namespace ANSCENTER {
 					});
 			}
 
-			return root.dump();
+			// ensure_ascii=true escapes non-ASCII chars as \uXXXX for LabVIEW compatibility
+			return root.dump(-1, ' ', true);
 		}
 		catch (const std::exception& e) {
 			// Add your error logging here if needed
@@ -839,7 +840,7 @@ namespace ANSCENTER {
 				for (const auto& part : res.parts) {
 					alprInfo[part.first] = part.second;
 				}
-				std::string extraInfoStr = alprInfo.dump();
+				std::string extraInfoStr = alprInfo.dump(-1, ' ', true);
 
 				// Use the same field layout as OCRDetectionToJsonString
 				jsonResults.push_back({
@@ -858,7 +859,7 @@ namespace ANSCENTER {
 					{"kps", ""}
 				});
 			}
-			return root.dump();
+			return root.dump(-1, ' ', true);
 		} catch (const std::exception&) {
 			return R"({"results":[],"error":"ALPR serialization failed"})";
 		}

modules/ANSODEngine/ANSEngineCommon.cpp

@@ -1104,10 +1104,10 @@ namespace ANSCENTER {
 					{"kps", KeypointsToString(det.kps)}
 					});
 			}
-			return root.dump();
+			// ensure_ascii=true escapes non-ASCII chars as \uXXXX for LabVIEW compatibility
+			return root.dump(-1, ' ', true);
 		}
 		catch (const std::exception& e) {
-			// Add your error logging here if needed
 			return R"({"results":[],"error":"Serialization failed"})";
 		}
 	}