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Commit2d38d13

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add barcode scanner tutorial
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‎README.md

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@@ -50,6 +50,7 @@ This is a repository of all the tutorials of [The Python Code](https://www.thepy
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-[How to Blur Faces in Images using OpenCV in Python](https://www.thepythoncode.com/article/blur-faces-in-images-using-opencv-in-python). ([code](machine-learning/blur-faces))
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-[Skin Cancer Detection using TensorFlow in Python](https://www.thepythoncode.com/article/skin-cancer-detection-using-tensorflow-in-python). ([code](machine-learning/skin-cancer-detection))
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-[How to Perform Malaria Cells Classification using TensorFlow 2 and Keras in Python](https://www.thepythoncode.com/article/malaria-cells-classification). ([code](machine-learning/malaria-classification))
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-[How to Make a Barcode Reader in Python](https://www.thepythoncode.com/article/making-a-barcode-scanner-in-python). ([code](general/barcode-reader))
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-[Building a Speech Emotion Recognizer using Scikit-learn](https://www.thepythoncode.com/article/building-a-speech-emotion-recognizer-using-sklearn). ([code](machine-learning/speech-emotion-recognition))
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-[How to Convert Speech to Text in Python](https://www.thepythoncode.com/article/using-speech-recognition-to-convert-speech-to-text-python). ([code](machine-learning/speech-recognition))
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-[Top 8 Python Libraries For Data Scientists and Machine Learning Engineers](https://www.thepythoncode.com/article/top-python-libraries-for-data-scientists).

‎general/barcode-reader/README.md

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#[How to Make a Barcode Reader in Python](https://www.thepythoncode.com/article/making-a-barcode-scanner-in-python)
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To run this:
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-`pip3 install -r requirements.txt`
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- To detect barcodes of the images in this directory:
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```
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python barcode_reader.py
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```
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- To detect barcodes live using your camera:
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```
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python live_barcode_reader.py
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```

‎general/barcode-reader/barcode1.png

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‎general/barcode-reader/barcode2.png

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‎general/barcode-reader/barcode3.png

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frompyzbarimportpyzbar
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importcv2
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defdecode(image):
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# decodes all barcodes from an image
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decoded_objects=pyzbar.decode(image)
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forobjindecoded_objects:
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# draw the barcode
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print("detected barcode:",obj)
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image=draw_barcode(obj,image)
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# print barcode type & data
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print("Type:",obj.type)
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print("Data:",obj.data)
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print()
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returnimage
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defdraw_barcode(decoded,image):
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# n_points = len(decoded.polygon)
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# for i in range(n_points):
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# image = cv2.line(image, decoded.polygon[i], decoded.polygon[(i+1) % n_points], color=(0, 255, 0), thickness=5)
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# uncomment above and comment below if you want to draw a polygon and not a rectangle
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image=cv2.rectangle(image, (decoded.rect.left,decoded.rect.top),
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(decoded.rect.left+decoded.rect.width,decoded.rect.top+decoded.rect.height),
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color=(0,255,0),
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thickness=5)
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returnimage
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if__name__=="__main__":
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fromglobimportglob
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barcodes=glob("barcode*.png")
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forbarcode_fileinbarcodes:
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# load the image to opencv
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img=cv2.imread(barcode_file)
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# decode detected barcodes & get the image
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# that is drawn
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img=decode(img)
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# show the image
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cv2.imshow("img",img)
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cv2.waitKey(0)
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frompyzbarimportpyzbar
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importcv2
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defdraw_barcode(decoded,image):
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# n_points = len(decoded.polygon)
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# for i in range(n_points):
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# image = cv2.line(image, decoded.polygon[i], decoded.polygon[(i+1) % n_points], color=(0, 255, 0), thickness=5)
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image=cv2.rectangle(image, (decoded.rect.left,decoded.rect.top),
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(decoded.rect.left+decoded.rect.width,decoded.rect.top+decoded.rect.height),
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color=(0,255,0),
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thickness=5)
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returnimage
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defdecode(image):
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# decodes all barcodes from an image
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decoded_objects=pyzbar.decode(image)
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forobjindecoded_objects:
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# draw the barcode
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image=draw_barcode(obj,image)
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# print barcode type & data
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print("Type:",obj.type)
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print("Data:",obj.data)
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print()
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returnimage
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if__name__=="__main__":
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cap=cv2.VideoCapture(0)
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whileTrue:
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# read the frame from the camera
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_,frame=cap.read()
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# decode detected barcodes & get the image
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# that is drawn
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frame,decoded_objects=decode(frame)
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# show the image in the window
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cv2.imshow("frame",frame)
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ifcv2.waitKey(1)==ord("q"):
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break
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opencv-python
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pyzbar

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