diff --git a/library/src/main/ets/downsampling/BaseDownsampling.ets b/library/src/main/ets/downsampling/BaseDownsampling.ets
index 28f34da..439a1cb 100644
--- a/library/src/main/ets/downsampling/BaseDownsampling.ets
+++ b/library/src/main/ets/downsampling/BaseDownsampling.ets
@@ -20,7 +20,4 @@ export interface BaseDownsampling {
   getName(): string
 
   getScaleFactor(sourceWidth: number, sourceHeight: number, requestWidth: number, requestHeight: number,downsampType?:DownsampleStrategy): number
-  //
-  getSampleSizeType(sourceWidth: number, sourceHeight: number, requestWidth: number,
-    requestHeight: number,downsampType?:DownsampleStrategy): SampleSizeRounding
 }
\ No newline at end of file