diff --git a/Documentation~/zh/changelog.md b/Documentation~/zh/changelog.md
index 5d4450db..efd4a126 100644
--- a/Documentation~/zh/changelog.md
+++ b/Documentation~/zh/changelog.md
@@ -79,6 +79,7 @@ slug: /changelog
 
 ## master
 
+* (2025.02.09) 修复`SaveAsImage`保存图片时不支持透明度的问题 (#337)
 * (2025.02.05) 增加`GraphChart`可单独设置`data`样式的支持
 * (2025.02.05) 重构`SerieSymbol`的`sizeFunction`参数
 * (2025.01.23) 修复`Treemap`的`Label`不显示的问题
diff --git a/Examples/Example50_Scatter.cs b/Examples/Example50_Scatter.cs
index 80f8f967..63d377fd 100644
--- a/Examples/Example50_Scatter.cs
+++ b/Examples/Example50_Scatter.cs
@@ -21,9 +21,9 @@ namespace XCharts.Example
             }
         }
 
-        float SymbolSize(List<double> data)
+        float SymbolSize(float defaultSize, SerieData serieData)
         {
-            return (float) (Math.Sqrt(data[2]) / 6e2);
+            return defaultSize;
         }
     }
 }
\ No newline at end of file
diff --git a/Runtime/Internal/Utilities/ChartHelper.cs b/Runtime/Internal/Utilities/ChartHelper.cs
index 6c1b31bf..46b9238a 100644
--- a/Runtime/Internal/Utilities/ChartHelper.cs
+++ b/Runtime/Internal/Utilities/ChartHelper.cs
@@ -1059,12 +1059,12 @@ namespace XCharts.Runtime
         {
             var cam = canvas.renderMode == RenderMode.ScreenSpaceOverlay ? null : canvas.worldCamera;
             var pos = RectTransformUtility.WorldToScreenPoint(cam, rectTransform.position);
-            var width = rectTransform.rect.width * canvas.scaleFactor;
-            var height = rectTransform.rect.height * canvas.scaleFactor;
+            var width = (int)(rectTransform.rect.width * canvas.scaleFactor);
+            var height = (int)(rectTransform.rect.height * canvas.scaleFactor);
             var posX = pos.x + rectTransform.rect.xMin * canvas.scaleFactor;
             var posY = pos.y + rectTransform.rect.yMin * canvas.scaleFactor;
             var rect = new Rect(posX, posY, width, height);
-            var tex = new Texture2D((int)width, (int)height, TextureFormat.RGBA32, false);
+            var tex = new Texture2D(width, height, TextureFormat.ARGB32, false);
             tex.ReadPixels(rect, 0, 0);
             tex.Apply();
             byte[] bytes;