diff --git a/WebApp/ImageGenerator.cs b/WebApp/ImageGenerator.cs
index 3d29be6..5ef919c 100644
--- a/WebApp/ImageGenerator.cs
+++ b/WebApp/ImageGenerator.cs
@@ -101,7 +101,7 @@ public class ImageGenerator
         var globalRoI = GenerateGlobalRoI(requestBody.CropOffset, requestBody.CropSize, canvasRect.Width,
             canvasRect.Height);
         
-        Mat canvas = new Mat(globalRoI.Width, globalRoI.Height, a1Mat.Type());
+        Mat canvas = new Mat(globalRoI.Height, globalRoI.Width, a1Mat.Type());
 
         Parallel.ForEach(matrix, item =>
         {
@@ -193,8 +193,8 @@ public class ImageGenerator
 
     private Rect GenerateInitialRectCanvas(Mat reference, int rowCount, int colCount)
     {
-        int width = reference.Rows * rowCount;
-        int height = reference.Cols * colCount;
+        int width = reference.Width * colCount;
+        int height = reference.Height * rowCount;
         return new Rect(0, 0, width, height);
     }