diff --git a/pkg/rrc/hf_filter.go b/pkg/rrc/hf_filter.go
index 5decf3a..9869852 100644
--- a/pkg/rrc/hf_filter.go
+++ b/pkg/rrc/hf_filter.go
@@ -1,6 +1,7 @@
 package rrc
 
 import (
+	"fmt"
 	"image"
 	"math"
 
@@ -166,3 +167,32 @@ func visualizeDFT(DFT gocv.Mat, file string) {
 	// 保存DFT结果
 	gocv.IMWrite(file, out)
 }
+
+func HFNoiseFilterSep(img gocv.Mat, radius float64) gocv.Mat {
+	const SepHeight = 4096
+	IDFT := gocv.NewMat()
+	IDFTs := []gocv.Mat{}
+	for rows := 0; rows < img.Rows(); rows += SepHeight {
+		row0 := rows
+		row1 := rows + SepHeight
+		if row1 > img.Rows() {
+			row1 = img.Rows()
+		}
+
+		fmt.Println("doing HF noise fileter rows range:", row0, row1)
+
+		mat := img.Region(image.Rect(0, row0, img.Cols(), row1))
+		matFiltered := HFNoiseFilter(mat, radius)
+		IDFTs = append(IDFTs, matFiltered)
+	}
+
+	gocv.Vconcat(IDFTs[0], IDFTs[1], &IDFT)
+	IDFTs[0].Close()
+	IDFTs[0].Close()
+	for i := 2; i < len(IDFTs); i++ {
+		gocv.Vconcat(IDFT, IDFTs[i], &IDFT)
+		IDFTs[i].Close()
+	}
+
+	return IDFT
+}