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ZoroWangZoroWang
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first draft
this python version is matching with DBR7.2.2
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‎LICENSE‎

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MIT License
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Copyright (c) 2018 Dynamsoft Barcode Reader
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.

‎README.md‎

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‎examples/camera/README.md‎

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## Blog
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- [How to Use Multiprocessing to Optimize Python Barcode Reader](https://www.codepool.biz/multiprocessing-optimize-python-barcode-reader.html)

‎examples/camera/camera-decodevideo.py‎

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import cv2
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from dbr import DynamsoftBarcodeReader
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dbr = DynamsoftBarcodeReader()
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import time
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import os
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import sys
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sys.path.append('../')
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# import config
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results = None
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# The callback function for receiving barcode results
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def onBarcodeResult(data):
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global results
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results = data
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def get_time():
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localtime = time.localtime()
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capturetime = time.strftime("%Y%m%d%H%M%S", localtime)
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return capturetime
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def read_barcode():
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global results
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video_width = 640
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video_height = 480
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vc = cv2.VideoCapture(0)
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vc.set(3, video_width) #set width
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vc.set(4, video_height) #set height
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if vc.isOpened():
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dbr.InitLicense('LICENSE-KEY')
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rval, frame = vc.read()
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else:
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return
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windowName = "Barcode Reader"
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max_buffer = 2
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max_results = 10
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image_format = 1 # 0: gray; 1: rgb888
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dbr.StartVideoMode(max_buffer, max_results, video_width, video_height, image_format, onBarcodeResult)
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while True:
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if results != None:
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thickness = 2
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color = (0,255,0)
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for result in results:
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print("barcode format: " + result["BarcodeFormatString"])
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print("barcode text: " + result["BarcodeText"])
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localizationResult = result["LocalizationResult"]
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x1 = localizationResult["X1"]
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y1 = localizationResult["Y1"]
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x2 = localizationResult["X2"]
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y2 = localizationResult["Y2"]
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x3 = localizationResult["X3"]
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y3 = localizationResult["Y3"]
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x4 = localizationResult["X4"]
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y4 = localizationResult["Y4"]
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cv2.line(frame, (x1, y1), (x2, y2), color, thickness)
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cv2.line(frame, (x2, y2), (x3, y3), color, thickness)
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cv2.line(frame, (x3, y3), (x4, y4), color, thickness)
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cv2.line(frame, (x4, y4), (x1, y1), color, thickness)
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results = None
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cv2.imshow(windowName, frame)
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rval, frame = vc.read()
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# start = time.time()
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try:
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ret = dbr.AppendVideoFrame(frame)
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except:
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pass
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# cost = (time.time() - start) * 1000
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# print('time cost: ' + str(cost) + ' ms')
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# 'ESC' for quit
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key = cv2.waitKey(1)
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if key == 27:
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break
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dbr.StopVideoMode()
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cv2.destroyWindow(windowName)
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if __name__ == "__main__":
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print("OpenCV version: " + cv2.__version__)
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read_barcode()

‎examples/camera/camera_multiprocessing.py‎

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import cv2
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from dbr import DynamsoftBarcodeReader
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dbr = DynamsoftBarcodeReader()
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import time
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import os
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from multiprocessing import Process, Queue
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import sys
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sys.path.append('../')
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# import config
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def clear_queue(queue):
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try:
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while True:
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queue.get_nowait()
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except:
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pass
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queue.close()
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queue.join_thread()
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def dbr_run(frame_queue, finish_queue):
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dbr.InitLicense("Input your own license")
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while finish_queue.qsize() == 0:
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try:
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inputframe = frame_queue.get_nowait()
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results = dbr.DecodeBuffer(inputframe)
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# textResults is a list object, the following program will output each whole text result.
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# if you just want some individual results in textResult, you can get all keys in text result and get the value by the key.
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textResults = results["TextResults"]
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intermediateResults = results["IntermediateResults"]
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for textResult in textResults:
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print(textResult)
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print(textResult.keys())
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# print(textResult["BarcodeFormat"])
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# print(textResult["BarcodeFormatString"])
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# print(textResult["BarcodeText"])
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# print(textResult["BarcodeBytes"])
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# # LocalizationResult is a dictionary object, you can use the same method as textResult to get the key-value.
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# print(textResult["LocalizationResult"])
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# # DetailedResult is a dictionary object, you can use the same method as textResult to get the key-value.
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# print(textResult["DetailedResult"])
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# # ExtendedResults is a list object , and each item of it is a dictionary object.
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# extendedResults = textResult["ExtendedResults"]
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# for extendedResult in extendedResults:
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# print(extendedResult)
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# intermediateResults is a list object, the following program will output each whole intermediate result.
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# if you just want some individual results in intermediateResult, you can get all keys in intermediateResult and get the value by the key.
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for intermediateResult in intermediateResults:
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print(intermediateResult)
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print(intermediateResult.keys())
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except:
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pass
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print("Detection is done.")
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clear_queue(frame_queue)
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clear_queue(finish_queue)
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def get_time():
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localtime = time.localtime()
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capturetime = time.strftime("%Y%m%d%H%M%S", localtime)
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return capturetime
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def read_barcode():
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frame_queue = Queue(4)
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finish_queue = Queue(1)
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dbr_proc = Process(target=dbr_run, args=(
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frame_queue, finish_queue))
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dbr_proc.start()
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vc = cv2.VideoCapture(0)
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# vc.set(5, 30) #set FPS
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vc.set(3, 640) #set width
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vc.set(4, 480) #set height
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if vc.isOpened(): # try to get the first frame
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rval, frame = vc.read()
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else:
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return
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windowName = "Barcode Reader"
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base = 2
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count = 0
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while True:
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cv2.imshow(windowName, frame)
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rval, frame = vc.read()
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count %= base
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if count == 0:
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try:
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frame_queue.put_nowait(frame)
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except:
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try:
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while True:
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frame_queue.get_nowait()
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except:
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pass
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count += 1
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# 'ESC' for quit
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key = cv2.waitKey(20)
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if key == 27:
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finish_queue.put(True)
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dbr_proc.join()
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break
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cv2.destroyWindow(windowName)
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if __name__ == "__main__":
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print("OpenCV version: " + cv2.__version__)
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read_barcode()

‎examples/command-line/test.py‎

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import os
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import json
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from dbr import DynamsoftBarcodeReader
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dbr = DynamsoftBarcodeReader()
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# print(dir(dbr))
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import cv2
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import sys
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sys.path.append('../')
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# import config
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def InitLicense(license):
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dbr.InitLicense(license)
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def DecodeFile(fileName, templateName = ""):
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try:
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# results is a dictionary object which includes TextResults and IntermediateResults.
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results = dbr.DecodeFile(fileName, templateName)
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# textResults is a list object, the following program will output each whole text result.
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# if you just want some individual results in textResult, you can get all keys in text result and get the value by the key.
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textResults = results["TextResults"]
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intermediateResults = results["IntermediateResults"]
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for textResult in textResults:
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print(textResult)
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print(textResult.keys())
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# print(textResult["BarcodeFormat"])
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# print(textResult["BarcodeFormatString"])
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# print(textResult["BarcodeText"])
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# print(textResult["BarcodeBytes"])
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# # LocalizationResult is a dictionary object, you can use the same method as textResult to get the key-value.
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# print(textResult["LocalizationResult"])
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# # DetailedResult is a dictionary object, you can use the same method as textResult to get the key-value.
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# print(textResult["DetailedResult"])
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# # ExtendedResults is a list object , and each item of it is a dictionary object.
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# extendedResults = textResult["ExtendedResults"]
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# for extendedResult in extendedResults:
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# print(extendedResult)
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# intermediateResults is a list object, the following program will output each whole intermediate result.
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# if you just want some individual results in intermediateResult, you can get all keys in intermediateResult and get the value by the key.
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for intermediateResult in intermediateResults:
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print(intermediateResult)
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print(intermediateResult.keys())
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except Exception as err:
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print(err)
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def DecodeBuffer(image, templateName = ""):
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results = dbr.DecodeBuffer(image, templateName)
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textResults = results["TextResults"]
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thickness = 2
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color = (0,255,0)
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for textResult in textResults:
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print("barcode format: " + textResult["BarcodeFormatString"])
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print("barcode text: " + textResult["BarcodeText"])
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localizationResult = textResult["LocalizationResult"]
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x1 = localizationResult["X1"]
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y1 = localizationResult["Y1"]
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x2 = localizationResult["X2"]
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y2 = localizationResult["Y2"]
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x3 = localizationResult["X3"]
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y3 = localizationResult["Y3"]
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x4 = localizationResult["X4"]
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y4 = localizationResult["Y4"]
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cv2.line(image, (x1, y1), (x2, y2), color, thickness)
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cv2.line(image, (x2, y2), (x3, y3), color, thickness)
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cv2.line(image, (x3, y3), (x4, y4), color, thickness)
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cv2.line(image, (x4, y4), (x1, y1), color, thickness)
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cv2.imshow("Localization", image)
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cv2.waitKey(0)
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def DecodeFileStream(imagePath, templateName = ""):
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with open(imagePath, "rb") as fread:
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total = fread.read()
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results = dbr.DecodeFileStream(bytearray(total), len(total))
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textResults = results["TextResults"]
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for textResult in textResults:
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print("barcode format: " + textResult["BarcodeFormatString"])
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print("barcode text: " + textResult["BarcodeText"])
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if __name__ == "__main__":
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print("OpenCV version: " + cv2.__version__)
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import sys
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barcode_image = ""
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if sys.version_info < (3, 0):
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barcode_image = raw_input("Enter the barcode file: ")
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else:
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barcode_image = input("Enter the barcode file: ")
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if not os.path.isfile(barcode_image):
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print("It is not a valid file.")
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else:
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InitLicense("Input your license")
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# Get default barcode params
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params = dbr.GetRuntimeSettings()
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params["BarcodeFormatIds"] = dbr.BF_ONED | dbr.BF_QR_CODE
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# Set parameters
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ret = dbr.UpdataRuntimeSettings(params)
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DecodeFile(barcode_image)
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image = cv2.imread(barcode_image, 1)
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DecodeBuffer(image)

‎examples/config.py‎

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import sys
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license = ''
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if sys.platform == "linux" or sys.platform == "linux2":
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# linux
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license = 't0068NQAAAJUlQ1oDc6zPWxOAQWn7kD9EGtgZFIqK/k3ULJC5ccG9Xe/lpVOxod82bm6nXxqQXUpC1zjRXU514mWw9XLE1JM='
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elif sys.platform == "darwin":
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# OS X
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license = 't0068NQAAAKrcxSxZwCY7qwBNDJJXAG3rFcJZTDsCdTHB2TlI0f1DvBg34MazLhAqhf6D2iE60OnWk9imYMc0inxb9OXWcrY='
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elif sys.platform == "win32":
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# Windows
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license = 't0068NQAAAJwEbwJjt0+DiC2gJpQN4VQUhYTBmazlOU0RgWzDins2JUhtO6TK2Kj/Ck9+z5FlwuHn0KLK1NvkXYvThosPYog='
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barcodeTypes = 0x3FF | 0x2000000 | 0x4000000 | 0x8000000 | 0x10000000 # 1D, PDF417, QRCODE, DataMatrix, Aztec Code

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