improve the CImageHandler class.

OTSIncAMeasureApp/ServiceCenter/CImageHandler.cs

@@ -114,7 +114,10 @@ namespace OTSModelSharp.ServiceInterface
 
             List<COTSParticleClr> parts = new List<COTSParticleClr>();
             List<COTSParticleClr> specialGreyparts = new List<COTSParticleClr>();
-            RemoveBGAndGetParts(a_pImgIn, a_pImgProcessParam, a_pixelSize,ref parts);
+            if (!RemoveBGAndGetParts(a_pImgIn, a_pImgProcessParam, a_pixelSize, ref parts))
+            {
+                return;
+            }
 
             if (a_pImgProcessParam.SpecialGreyRangeParam.GetIsToRun())
             {
@@ -207,7 +210,10 @@ namespace OTSModelSharp.ServiceInterface
          
             OTSCLRINTERFACE.COTSImgProcPrmClr prm = GetImageProcPrmClr(a_pImgProcessParam);
             OTSCLRINTERFACE.COTSFieldDataClr flddataclr = new OTSCLRINTERFACE.COTSFieldDataClr();
-            imgpro.GetFieldDataFromImage(img, prm, a_pixelSize, flddataclr);
+            if (!imgpro.GetFieldDataFromImage(img, prm, a_pixelSize, flddataclr))
+            {
+                return false;
+            }
             
             parts = flddataclr.GetParticleList();
             return true;