A set of scripts to produce a mosaic from images.

Assuming you have Python (and pip) at your disposal, install the dependencies like so:

pip install flickr_api
pip install Pillow

Get yourself a Flickr API key from here. You should now have a "key" and a "secret". Put the key and secret in a JSON file, formatted like this:

{
    "api": {
        "key": "your-key-goes-here",
        "secret": "your-secret-goes-here"
    }
}

Save that file as flickr.json. Now that you have an API key, you can use the flickr-get.py script to download images. Make a directory called images in the same place that flickr-get.py is stored. Then you can run the script like this:

python2 flickr-get.py ./path/to/your/flickr.json "your-keyword-here"

Where "your-keyword-here" is a keyword you wish to search for. You must specify a keyword. The images will download into the images directory. You probably need a library of about 500 to 1000 images from Flickr. You must make sure that there is a good range of colours in the images that you download, or your mosaics won't look good!

You must run this script to turn the images that you downloaded from Flickr into evenly-sized tiles. Make another directory called tiles. This will contain the resized images.

python2 preprocess.py ./path/to/directory/for/images ./path/to/directory/for/tiles

This script is easy to use.

Once you have a good library of images to use as mosaic tiles, find an image that you would like to turn into a mosaic and resize it to a small size using your favourite image editing tool. I suggest keeping your input image to about 32x32 pixels if you can (because the mosaic will be 64x bigger). Then run the mosaic script like so:

python2 colour-mosaic.py ./directory/containing/tiles ./path/to/input.jpg ./path/to/output.jpg

You should see a mosaic appear, called output.jpg.