How to generate your own characteristic QR code in Python
In this issue, the editor will bring you about how to generate your own characteristic QR code in Python. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article.
The qrcode library uses def gen_qrcode (text):
# create qrcode object
Qr = qrcode.QRCode (
Version=2
Error_correction=qrcode.constants.ERROR_CORRECT_Q
Box_size=10
Border=2
)
Qr.add_data (text)
# create a QR code picture
Img = qr.make_image ()
# convert the picture to RGBA format
Img = img.convert ('RGBA')
# return the size of the QR code image
Img_w, img_h = img.size
# Open logo
Logo = Image.open (os.path.join (BASE_DIR, 'static/images/logo.jpeg'))
# the logo size is 1/4 of the QR code
Logo_w = img_w / / 4
Logo_h = img_w / / 4
# modify logo image size
Logo = logo.resize ((logo_w, logo_h), Image.ANTIALIAS)
# put logo in the middle of the QR code
W = (img_w-logo_w) / / 2
H = (img_h-logo_h) / / 2
Img.paste (logo (w, h))
Qr_path = 'static/imgcard/%s.png'% time.time ()
Img.save (os.path.join (BASE_DIR, qr_path))
Return qr_path
Parameter meaning:
Version: an integer with a value of 1 to 40 that controls the size of the QR code (the minimum value is 1, which is a 12 × 12 matrix)
Error_correction: controls the error correction function of QR code. You can take the following four constants.
ERROR_CORRECT_L: about 7% or less of errors can be corrected.
ERROR_CORRECT_M (default): about 15% or less of errors can be corrected.
ROR_CORRECT_H: about 30% or less of errors can be corrected.
Box_size: controls the number of pixels contained in each grid in the QR code.
Border: controls the number of squares contained in the border (the distance between the QR code and the image boundary) (the default is 4, which is the minimum specified by the relevant standards)
The myqr library uses from MyQR import myqr
Myqr.run (
Fill in the link or text content in words=' http://www.baidu.com', # words
Version=1, # controls the QR code size from 1 to 40. It is recommended that you do not exceed 5, otherwise the generation time is too long.
Level='H', # controls the error correction level, which ranges from L, M, Q, H, and rises sequentially from left to right.
Picture='background.gif', # background image, which can be in .jpg, .png, .bmp, .gif format
Colorized=True, # can change the resulting picture from black and white (False) to color (True)
Contrast=1.0, # is used to adjust the contrast of the picture, 1. 0 represents the original picture, a smaller value indicates lower contrast, and vice versa. The default is 1.0.
Brightness=1.0, # is used to adjust the brightness of the picture
)
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