Process png files to a json file

config.json

{
    "objects": {
        "#000000": {
            "image": "/assets/images/rock"
        }
    },
    "#ac3232": {
        "player": {}
    }
}

output.json

{
    "objects": [
        {
            "image": "/assets/images/rock",
            "x": 96,
            "y": 176
        },
        {
            "image": "/assets/images/rock",
            "x": 128,
            "y": 176
        },
        {
            "image": "/assets/images/rock",
            "x": 160,
            "y": 176
        },
        {
            "image": "/assets/images/rock",
            "x": 96,
            "y": 192
        },
        {
            "image": "/assets/images/rock",
            "x": 112,
            "y": 192
        },
        {
            "image": "/assets/images/rock",
            "x": 128,
            "y": 192
        },
        {
            "image": "/assets/images/rock",
            "x": 160,
            "y": 192
        },
        {
            "image": "/assets/images/rock",
            "x": 96,
            "y": 208
        },
        {
            "image": "/assets/images/rock",
            "x": 128,
            "y": 208
        },
        {
            "image": "/assets/images/rock",
            "x": 160,
            "y": 208
        }
    ],
    "player": {
        "x": 128,
        "y": 128
    }
}

process.py

import json
import click
from PIL import Image


@click.group()
def cli():
    pass


@cli.command()
@click.argument("file_path", type=click.Path(exists=True))
@click.argument("output_file_path")
@click.option("--config-path", "-c", default="./support/maps/config.json", type=click.Path(exists=True))
@click.option("--scale", "-s", default=16, type=int)
def map(file_path, output_file_path, config_path, scale):
    img = Image.open(file_path)
    pixels = img.load()
    width, height = img.size
    config = json.load(open(config_path))

    result = {key: [] for key in config if not key.startswith("#")}
    for y in range(height):
        for x in range(width):
            x_pos = x * scale
            y_pos = y * scale
            r, g, b, a = pixels[x, y]
            hex = f"#{r:02x}{g:02x}{b:02x}"
            if a == 255:
                found = False
                if hex in config:
                    found = True
                    for key in config[hex]:
                        object = config[hex][key].copy()
                        object["x"] = x_pos
                        object["y"] = y_pos
                        result[key] = object

                if not found:
                    for key in result:
                        if key in config and hex in config[key]:
                            found = True
                            object = config[key][hex].copy()
                            object["x"] = x_pos
                            object["y"] = y_pos
                            result[key].append(object)

                if not found:
                    print(f"Unknown color: {hex} at ({x}, {y})")

    with open(output_file_path, "w") as f:
        json.dump(result, f, indent=4)


if __name__ == "__main__":
    cli()

Here's the source png: