app.py

import gradio as gr
import cv2
import json
import numpy as np
import glob2 as glob
from PIL import Image

from pyAAMED import pyAAMED

title = """
<h1>Arc Adjacency Matrix based Fast Ellipse Detection</h1>
<a href="https://github.com/Li-Zhaoxi/AAMED">Gitub</a>
"""

def detect_ellipses(img_path):
    imgC = cv2.imread(img_path)
    imgG = cv2.cvtColor(imgC, cv2.COLOR_BGR2GRAY)

    ammed_size = 600
    iheight, iwidth = imgG.shape
    
    imax = max(iheight, iwidth)
    iscale = (ammed_size - 1) / imax
    is_landscape = iwidth >= iheight
    if is_landscape:
        iw = imax * iscale
        ih = iheight * iscale
    else:
        iw = iwidth * iscale
        ih = imax * iscale

    imgG = cv2.resize(imgG, (int(iw), int(ih)))
    
    aamed = pyAAMED(ammed_size, ammed_size)
    aamed.setParameters(3.1415926/3, 3.4, 0.77)

    print(ammed_size, iw, ih, imgG.shape)
    
    result = aamed.run_AAMED(imgG)

    imgN = imgG.copy()

    if len(result) > 0:
        imgN = cv2.cvtColor(imgN, cv2.COLOR_GRAY2RGB)
        for e in result:
            x, y, w, h, a, _ = e
            imgN = cv2.ellipse(imgN, (y, x), (int(h / 2), int(w / 2)), -a, 0, 360, (0, 255, 0), 3) # image, center_coordinates, axesLength, angle, startAngle, endAngle, color, thickness

            # from CPP code:
            # temp.center.x = detEllipses[i].center.y;
    		# temp.center.y = detEllipses[i].center.x;
    		# temp.size.height = detEllipses[i].size.width;
    		# temp.size.width = detEllipses[i].size.height;
    		# temp.angle = -detEllipses[i].angle;

        result = result.tolist()
    else:
        result = []
    
    return [Image.fromarray(imgN), json.dumps(result)]

examples = []

test_files = glob.glob('./examples/*.jpg') + glob.glob('./examples/*.png')
for f in test_files:
    examples = examples + [[f]]

gr.Interface(
    fn=detect_ellipses,
    inputs=gr.Image(label="Upload image with ellipses", type="filepath"),
    outputs=[
        gr.Image(type="pil", label="Detected ellipses"),
        gr.Textbox(label="Detected ellipses")
    ],
    title=title,
    examples=examples,
    allow_flagging='never'
).launch(
    debug=True,
    server_name="0.0.0.0", 
    server_port=7860
)