diff --git a/components/nn/include/maix_nn_object.hpp b/components/nn/include/maix_nn_object.hpp
index 5fd7124b..fb37d6c5 100644
--- a/components/nn/include/maix_nn_object.hpp
+++ b/components/nn/include/maix_nn_object.hpp
@@ -259,7 +259,7 @@ namespace maix::nn
 
         /**
          * Get object item
-         * @maixpy maix.nn.Objects.__item__
+         * @maixpy maix.nn.Objects.__getitem__
          * @maixcdk maix.nn.Objects.[]
          */
         nn::Object &operator[](int idx)
diff --git a/components/nn/include/maix_nn_ocr_object.hpp b/components/nn/include/maix_nn_ocr_object.hpp
index c25f96d3..e9f39664 100644
--- a/components/nn/include/maix_nn_ocr_object.hpp
+++ b/components/nn/include/maix_nn_ocr_object.hpp
@@ -261,7 +261,7 @@ namespace maix::nn
 
         /**
          * Get object item
-         * @maixpy maix.nn.OCR_Objects.__item__
+         * @maixpy maix.nn.OCR_Objects.__getitem__
          * @maixcdk maix.nn.OCR_Objects.[]
          */
         nn::OCR_Object &operator[](int idx)
diff --git a/components/nn/include/maix_nn_yolo11.hpp b/components/nn/include/maix_nn_yolo11.hpp
index 36a95de3..bd3121b3 100644
--- a/components/nn/include/maix_nn_yolo11.hpp
+++ b/components/nn/include/maix_nn_yolo11.hpp
@@ -346,12 +346,12 @@ namespace maix::nn
                     int y2 = points[pos[i * 2 + 1] * 2 + 1];
                     if (x1 < 0 || y1 < 0 || x2 < 0 || y2 < 0)
                         continue;
-                    img.draw_line(x1, y1, x2, y2, image::COLOR_RED, 2);
+                    img.draw_line(x1, y1, x2, y2, color, 2);
                 }
                 int x = (points[5 * 2] + points[6 * 2]) / 2;
                 int y = (points[5 * 2 + 1] + points[6 * 2 + 1]) / 2;
                 if (!(points[5 * 2] < 0 || points[5 * 2 + 1] < 0 || points[6 * 2] < 0 || points[6 * 2 + 1] < 0 || x < 0 || y < 0 || points[0] < 0 || points[1] < 0))
-                    img.draw_line(points[0], points[1], x, y, image::COLOR_RED, 2);
+                    img.draw_line(points[0], points[1], x, y, color, 2);
             }
             for (size_t i = 0; i < points.size() / 2; ++i)
             {
diff --git a/components/vision/include/maix_display.hpp b/components/vision/include/maix_display.hpp
index 2ae4dc09..793ed0ba 100644
--- a/components/vision/include/maix_display.hpp
+++ b/components/vision/include/maix_display.hpp
@@ -202,4 +202,11 @@ namespace maix::display
      * @maixpy maix.display.send_to_maixvision
     */
     void send_to_maixvision(image::Image &img);
+
+    /**
+     * Set image transport quality(only for JPEG)
+     * @param quality default 95, value from 51 ~ 100
+     * @maixpy maix.display.set_trans_image_quality
+     */
+    void set_trans_image_quality(const int value);
 }
diff --git a/components/vision/include_private/maix_image_trans.hpp b/components/vision/include_private/maix_image_trans.hpp
index 368e7145..305f7082 100644
--- a/components/vision/include_private/maix_image_trans.hpp
+++ b/components/vision/include_private/maix_image_trans.hpp
@@ -16,6 +16,7 @@ namespace maix
         err::Err send_image(image::Image &img);
         err::Err set_format(image::Format fmt, int quality = 95);
         image::Format get_format() { return _fmt; }
+        void set_quality(const int quality) { _quality = quality; }
 
     private:
         void *_handle;
diff --git a/components/vision/src/maix_display.cpp b/components/vision/src/maix_display.cpp
index 1da27d8b..acba8b51 100644
--- a/components/vision/src/maix_display.cpp
+++ b/components/vision/src/maix_display.cpp
@@ -276,4 +276,10 @@ namespace maix::display
 
     }
 
+    void set_trans_image_quality(const int value)
+    {
+        if(img_trans)
+            img_trans->set_quality(value);
+    }
+
 } // namespace maix::display
diff --git a/components/vision/src/maix_image_trans.cpp b/components/vision/src/maix_image_trans.cpp
index a23ea898..71a06605 100644
--- a/components/vision/src/maix_image_trans.cpp
+++ b/components/vision/src/maix_image_trans.cpp
@@ -34,6 +34,8 @@ using websocketpp::lib::placeholders::_2;
 #define IMG_ENCODE_JPEG 1
 #define IMG_ENCODE_PNG  2
 
+static int jpeg_quality = 95;
+
 enum ImageTransFmt
 {
     IMG_TRANS_FMT_NONE = 0, // pause trans
@@ -454,7 +456,14 @@ namespace maix
         // compress image to jpeg
         if (img.format() != _fmt)
         {
-            compressed = img.to_format(_fmt);
+            if(_fmt == image::FMT_JPEG)
+            {
+                compressed = img.to_jpeg(this->_quality);
+            }
+            else
+            {
+                compressed = img.to_format(_fmt);
+            }
             if (compressed == nullptr)
             {
                 log::error("compress image failed\n");