diff --git a/examples/single_chip/detection_with_command_line/main/app_facenet.c b/examples/single_chip/detection_with_command_line/main/app_facenet.c
index a3f87e9..95e2f60 100644
--- a/examples/single_chip/detection_with_command_line/main/app_facenet.c
+++ b/examples/single_chip/detection_with_command_line/main/app_facenet.c
@@ -72,6 +72,7 @@ void task_process (void *arg)
         if (true != res)
         {
             ESP_LOGE(TAG, "fmt2rgb888 failed, fb: %d", fb->len);
+            dl_matrix3du_free(image_matrix);
             continue;
         }
 
diff --git a/examples/single_chip/recognition_with_command_line/main/app_facenet.c b/examples/single_chip/recognition_with_command_line/main/app_facenet.c
index aa881d9..9cf5ebe 100644
--- a/examples/single_chip/recognition_with_command_line/main/app_facenet.c
+++ b/examples/single_chip/recognition_with_command_line/main/app_facenet.c
@@ -101,6 +101,7 @@ void task_process(void *arg)
         if (true != res)
         {
             ESP_LOGE(TAG, "fmt2rgb888 failed, fb: %d", fb->len);
+            dl_matrix3du_free(image_matrix);
             continue;
         }