Convert-Roboflow-annotation-to-Labelme

import json
import os

def convert_coco_to_json(image_entry, data, output_folder):
    # Extract the numerical part of the image name to use as the new name
    new_name = image_entry["file_name"].split('_')[1].split('.')[0]

    # Get the annotations for this image
    annotations = [ann for ann in data["annotations"] if ann["image_id"] == image_entry["id"]]

    # Create a new JSON structure for this image
    converted_data = {
        "version": "3.21.1",
        "flags": {},
        "shapes": [],
        "lineColor": [0, 255, 0, 128],
        "fillColor": [255, 0, 0, 128],
        "imagePath": f"{new_name}.jpg",
        "imageData": "",
        "imageHeight": image_entry["height"],
        "imageWidth": image_entry["width"]
    }

    for annotation in annotations:
        # Convert COCO segmentation to points
        segmentation = annotation["segmentation"][0]  # Assuming one polygon per annotation
        points = [[segmentation[i], segmentation[i + 1]] for i in range(0, len(segmentation), 2)]

        shape = {
            "label": next((cat["name"] for cat in data["categories"] if cat["id"] == annotation["category_id"]), "unknown"),
            "line_color": None,
            "fill_color": None,
            "points": points,
            "shape_type": "polygon",
            "flags": {}
        }

        converted_data["shapes"].append(shape)

    # Save the converted data to a new JSON file
    output_file = os.path.join(output_folder, f"{new_name}.json")
    with open(output_file, "w") as f:
        json.dump(converted_data, f, indent=4)

    return output_file

    # Load the original COCO annotations JSON file
with open(r"write the path here") as f:
    data = json.load(f)

    # Set the output folder for the converted JSON files
output_folder = r"write the path here"

    # Generate annotations for all images
converted_files = []
for image_entry in data["images"]:
    output_file = convert_coco_to_json(image_entry, data, output_folder)
    if output_file:
        converted_files.append(output_file)

print(f"Converted JSON files created: {len(converted_files)}")