实现电镜控制的picosmart 接口，增加获取工作距离

OTSIncAMeasureApp/1-OTSMeasure/Measure/3-MeasureFlow/CSmplMeasure.cs

@@ -245,7 +245,7 @@ namespace OTSModelSharp
             }
 
             // set image size
-            if (!pScanController.SetImageSize(sizePixelImage.Width/2, sizePixelImage.Height/2))
+            if (!pScanController.SetImageSize(sizePixelImage.Width, sizePixelImage.Height))
             {
                 // failed to set dwell time
                 log.Error("SetBSEParam: failed to set ImageSize");