diff --git a/components/vision/include/maix_image.hpp b/components/vision/include/maix_image.hpp
index 8a779a07..9080a552 100644
--- a/components/vision/include/maix_image.hpp
+++ b/components/vision/include/maix_image.hpp
@@ -629,11 +629,11 @@ namespace maix::image
          * @param mask Mask is another image to use as a pixel level mask for the operation. The mask should be an image with just black or white pixels and should be the same size as the image being operated on.
          * Only pixels set in the mask are modified. default is None.
          * @param to_bitmap If true, the image will be converted to a bitmap image before thresholding. default is false. TODO: support in the feature
-         * @param copy Select whether to return a new image or modify the original image. default is true.
+         * @param copy Select whether to return a new image or modify the original image. default is false.
          * @return Returns the image after the operation is completed.
          * @maixpy maix.image.Image.binary
         */
-        image::Image *binary(std::vector<std::vector<int>> thresholds = std::vector<std::vector<int>>(), bool invert = false, bool zero = false, image::Image *mask = nullptr, bool to_bitmap = false, bool copy = true);
+        image::Image *binary(std::vector<std::vector<int>> thresholds = std::vector<std::vector<int>>(), bool invert = false, bool zero = false, image::Image *mask = nullptr, bool to_bitmap = false, bool copy = false);
 
         /**
          * @brief Inverts the image in place.
diff --git a/components/vision/port/maixcam/maix_camera_mmf.cpp b/components/vision/port/maixcam/maix_camera_mmf.cpp
index c93cc101..5260627e 100644
--- a/components/vision/port/maixcam/maix_camera_mmf.cpp
+++ b/components/vision/port/maixcam/maix_camera_mmf.cpp
@@ -229,22 +229,20 @@ namespace maix::camera
         _config_sensor_env(_fps);
 
         // mmf init
-        if (!mmf_is_init()) {
-            mmf_sys_cfg_t sys_cfg = {0};
-            if (_width <= 1280 && _height <= 720 && _fps > 30) {
-                sys_cfg.vb_pool[0].size = 1280 * 720 * 3 / 2;
-                sys_cfg.vb_pool[0].count = 3;
-                sys_cfg.vb_pool[0].map = 2;
-                sys_cfg.max_pool_cnt = 1;
-            } else {
-                sys_cfg.vb_pool[0].size = 2560 * 1440 * 3 / 2;
-                sys_cfg.vb_pool[0].count = 2;
-                sys_cfg.vb_pool[0].map = 3;
-                sys_cfg.max_pool_cnt = 1;
-            }
-            mmf_pre_config_sys(&sys_cfg);
-            err::check_bool_raise(!mmf_init(), "mmf init failed");
+        mmf_sys_cfg_t sys_cfg = {0};
+        if (_width <= 1280 && _height <= 720 && _fps > 30) {
+            sys_cfg.vb_pool[0].size = 1280 * 720 * 3 / 2;
+            sys_cfg.vb_pool[0].count = 3;
+            sys_cfg.vb_pool[0].map = 2;
+            sys_cfg.max_pool_cnt = 1;
+        } else {
+            sys_cfg.vb_pool[0].size = 2560 * 1440 * 3 / 2;
+            sys_cfg.vb_pool[0].count = 2;
+            sys_cfg.vb_pool[0].map = 3;
+            sys_cfg.max_pool_cnt = 1;
         }
+        mmf_pre_config_sys(&sys_cfg);
+        err::check_bool_raise(!mmf_init(), "mmf init failed");
 
         mmf_vi_cfg_t cfg = {0};
         cfg.w = _width;