Define an image-proxy field / group of fields ?
There are some fields that provide proxies to the visual content of images (image-particle-count, image-average-color, image-mpeg-XYZ). Should this become more generic? Should there be more such proxies pre-defined? Particular focus could be placed on fields that are useful for displaying image set overviews in web interfaces, especially the marine data viewer or media galleries. One example could be an "image-set-central-pixel-column-stack" that takes the central pixel column of each image / frame in an image set and joins them together horizontally.