Update Readme

Author: ZoroWang

README.md

@@ -6,6 +6,9 @@
 ![Dynamsoft](https://dynamsoft.github.io/styleguide/assets/img-icon/logo-dynamsoft-whiteBg-190x47.png "Dynamsoft") | ![dbr](https://dynamsoft.github.io/styleguide/assets/img-icon/logo-dbr-88x88.png "dbr")
 
 
+## What You Should Know
+- [![](https://img.shields.io/badge/Get-30--day%20FREE%20Trial%20License-blue)](https://www.dynamsoft.com/customer/license/trialLicense/?product=dbr)
+
 **[Dynamsoft's Barcode Reader SDK](https://www.dynamsoft.com/barcode-reader/overview/?utm_source=github) enables you to efficiently embed barcode reading functionality in your web, desktop or mobile application using just a few lines of code. Saving you months of added development time and resources, our SDK can create high-speed and reliable barcode scanner software applications to meet your business needs.**
 
 ## Dynamsoft Barcode Reader - Python Edition
@@ -128,13 +131,29 @@ license_key = "Input your own license"
 json_file = r"Please input your own template path"
 image = r"Please input your own image path"
 
+## The code snippet below shows how to use the full license in DBR 8.x:
+# connection_paras = BarcodeReader.init_lts_connection_parameters()
+## If DBR service is already built on your server, you can fill in the address of your server, or leave this property's default value.
+# connection_paras.main_server_url = "Input your own server url"
+# connection_paras.handshake_code = "Input your own handshake"
+# connection_paras.deployment_type = EnumDMDeploymentType.DM_DT_DESKTOP
+# connection_paras.uuid_generation_method = EnumDMUUIDGenerationMethod.DM_UUIDGM_RANDOM
+# try:
+# error = BarcodeReader.init_license_from_lts(connection_paras)
+# if error[0] != EnumErrorCode.DBR_OK:
+# print(error[1])
+# except BarcodeReaderError as bre:
+# print(bre)
+
 reader = BarcodeReader()
 
 reader.init_license(license_key)
 #reader.init_license_from_server(license_server, license_key)
 #license_content = reader.output_license_to_string()
 #reader.init_license_from_license_content(license_key, license_content)
 
+
+
 error = reader.init_runtime_settings_with_file(json_file)
 if error[0] != EnumErrorCode.DBR_OK:
  print(error[1])

samples/test_DecodeVideoByPiCamera.py

@@ -159,6 +159,7 @@ def read_barcode():
 
  reader.stop_video_mode()
  cv2.destroyWindow(windowName)
+ camera.close()
 
 
 print("-------------------start------------------------")