diff --git a/weed/images/resizing.go b/weed/images/resizing.go
index 7e4a88c42..aa6574eb0 100644
--- a/weed/images/resizing.go
+++ b/weed/images/resizing.go
@@ -16,6 +16,15 @@ func Resized(ext string, data []byte, width, height int) (resized []byte, w int,
 		return data, 0, 0
 	}
 	srcImage, _, err := image.Decode(bytes.NewReader(data))
+
+	dx := srcImage.Bounds().Dx()
+	dy := srcImage.Bounds().Dy()
+	if width/height > dx/dy { //定高
+		width = height * dx / dy
+	} else if width/height < dx/dy { //定宽
+		height = width * dy / dx
+	}
+
 	if err == nil {
 		bounds := srcImage.Bounds()
 		var dstImage *image.NRGBA
diff --git a/weed/weed b/weed/weed
deleted file mode 100755
index 2d6fe7ceb..000000000
Binary files a/weed/weed and /dev/null differ
diff --git a/weed/weed_linux_amd64 b/weed/weed_linux_amd64
deleted file mode 100755
index b0f7b6ad3..000000000
Binary files a/weed/weed_linux_amd64 and /dev/null differ