diff --git a/components/label/components/PaperContainer.tsx b/components/label/components/PaperContainer.tsx
index 9058797..a3f4a9f 100644
--- a/components/label/components/PaperContainer.tsx
+++ b/components/label/components/PaperContainer.tsx
@@ -1175,20 +1175,13 @@ const PaperContainer = (
     }
   }
 
-  const getMinAreaBySizeThreshold = useCallback(
-    (sizeThreshold: number) => {
-      const normalizedSizeThreshold = Math.max(0, Number(sizeThreshold) || 0)
-      const currentScale =
-        usePaperStore.getState().rasterScale[activeImage] ?? 1
-      return (
-        normalizedSizeThreshold *
-        normalizedSizeThreshold *
-        currentScale *
-        currentScale
-      )
-    },
-    [activeImage]
-  )
+  const getMinAreaBySizeThreshold = useCallback((sizeThreshold: number) => {
+    const normalizedSizeThreshold = Math.max(0, Number(sizeThreshold) || 0)
+    // Threshold input is already expressed in the visible canvas coordinate
+    // system, so the area threshold should be size^2 without reapplying
+    // rasterScale.
+    return normalizedSizeThreshold * normalizedSizeThreshold
+  }, [])
 
   function filterSupportPreviewBySizeThreshold(sizeThreshold: number) {
     const group = usePaperStore.getState().group
diff --git a/components/label/components/TopTools.tsx b/components/label/components/TopTools.tsx
index 3f0aebc..863a0e6 100644
--- a/components/label/components/TopTools.tsx
+++ b/components/label/components/TopTools.tsx
@@ -2231,7 +2231,7 @@ const TopTools = (
               </Flex>
             </Tooltip>
             <Tooltip
-              label={`按尺寸阈值过滤辅助结果或选中 polygon（F2），实际面积阈值为 ${(Number(auxiliarySizeThresholdInput) || 0) ** 2}`}>
+              label={`按当前可见画布尺寸阈值过滤辅助结果或选中 polygon（F2），面积阈值 = size² = ${(Number(auxiliarySizeThresholdInput) || 0) ** 2}`}>
               <Flex align="center" gap={4} wrap="nowrap">
                 <Text span size="xs" style={{ minWidth: "fit-content" }}>
                   尺寸