Progress! This is the algorithm that leads to circles:

1. get a place name;
2. call on Flickr to get georeference for place name;
3. call on flickr to get 22 images geo-tagged to georeference, sort for high ‘interestingness’;
4. store these images in folder as .jpg;
5. convert images to .bmp and store in same folder;
6. randomize .bmp images;
7. make randomized .bmp images into circles;
8. output randomized circles to browser, onclick go to Flickr original.

I am getting closer to my goal: total control over the picture at the pixel level.  Next steps to be considered: make colored barcode = colour map for place; input image string to voicebot; input images to flash movie.