diff --git a/fastdeploy/vision/visualize/visualize.h b/fastdeploy/vision/visualize/visualize.h
index 498944c23..3507c6499 100755
--- a/fastdeploy/vision/visualize/visualize.h
+++ b/fastdeploy/vision/visualize/visualize.h
@@ -161,9 +161,26 @@ FASTDEPLOY_DECL cv::Mat VisOcr(const cv::Mat& im, const OCRResult& ocr_result);
 FASTDEPLOY_DECL cv::Mat VisMOT(const cv::Mat& img, const MOTResult& results,
                                float score_threshold = 0.0f,
                                tracking::TrailRecorder* recorder = nullptr);
-FASTDEPLOY_DECL cv::Mat SwapBackground(
-    const cv::Mat& im, const cv::Mat& background, const MattingResult& result,
-    bool remove_small_connected_area = false);
+/** \brief Swap the image background with MattingResult
+ *
+ * \param[in] im the input image data, comes from cv::imread(), is a 3-D array with layout HWC, BGR format
+ * \param[in] background the background image data, comes from cv::imread(), is a 3-D array with layout HWC, BGR format
+ * \param[in] result the MattingResult produced by model
+ * \param[in] remove_small_connected_area if remove_small_connected_area==true, the visualized result will not include the small connected areas
+ * \return cv::Mat type stores the visualized results
+ */
+FASTDEPLOY_DECL cv::Mat SwapBackground(const cv::Mat& im,
+                                      const cv::Mat& background,
+                                      const MattingResult& result,
+                                      bool remove_small_connected_area = false);
+/** \brief Swap the image background with SegmentationResult
+ *
+ * \param[in] im the input image data, comes from cv::imread(), is a 3-D array with layout HWC, BGR format
+ * \param[in] background the background image data, comes from cv::imread(), is a 3-D array with layout HWC, BGR format
+ * \param[in] result the SegmentationResult produced by model
+ * \param[in] background_label the background label number in SegmentationResult
+ * \return cv::Mat type stores the visualized results
+ */
 FASTDEPLOY_DECL cv::Mat SwapBackground(const cv::Mat& im,
                                        const cv::Mat& background,
                                        const SegmentationResult& result,
diff --git a/python/fastdeploy/vision/visualize/__init__.py b/python/fastdeploy/vision/visualize/__init__.py
index 6ebd08c1c..e528c8804 100755
--- a/python/fastdeploy/vision/visualize/__init__.py
+++ b/python/fastdeploy/vision/visualize/__init__.py
@@ -138,6 +138,15 @@ def swap_background(im_data,
                     result,
                     remove_small_connected_area=False,
                     background_label=0):
+    """Swap the image background with MattingResult or SegmentationResult
+
+    :param im_data: (numpy.ndarray)The input image data, 3-D array with layout HWC, BGR format
+    :param background: (numpy.ndarray)The background image data, 3-D array with layout HWC, BGR format
+    :param result: The result produced by model, MattingResult or SegmentationResult
+    :param remove_small_connected_area: (bool) If remove_small_connected_area==True, the visualized result will not include the small connected areas
+    :param background_label: (int)The background label number in SegmentationResult
+    :return: (numpy.ndarray) image with visualized results
+    """
     if isinstance(result, C.vision.MattingResult):
         return C.vision.swap_background(im_data, background, result,
                                         remove_small_connected_area)