app.py

import gradio as gr
import zxingcpp
from PIL import Image

import cv2

def decode(im,col):
    img = cv2.imread(f'{im}')
    try:
        results = zxingcpp.read_barcodes(img)
        return results[0].text
    except Exception:
    
        #qr_img=Image.open(im).convert("RGBA")
        qr_img=Image.open(im)
        datas = qr_img.getdata()
        newData = []
        h1 = col.strip("#")
        rgb_tup = tuple(int(h1[i:i+2], 16) for i in (0, 2, 4))
        for item in datas:
            if item[0] == rgb_tup[0] and item[1] == rgb_tup[1] and item[2] == rgb_tup[2]:
                newData.append(0,0,0)
            else:
                newData.append(255,255,255)
        qr_img.putdata(newData)
        qr_img.save('conv_im.png')
        img = cv2.imread('conv_im.png')
        try:
            results = zxingcpp.read_barcodes(img)
            return results[0].text
        except Exception:
            return "QR Code not Detected \nTry choosing the QR code color using the eyedropper in the Color Picker"
    


with gr.Blocks() as app:
    in_im = gr.Image(label="QR Image to Decode")
    dec_btn = gr.Button("Decode QR")
    text_out = gr.Textbox(label="Decoded Text")    
    choose_color = gr.ColorPicker()
    
    dec_btn.click(decode,[in_im,choose_color],text_out)
app.queue(concurrency_count=10).launch()