For the strong/weak category I quickly thought of trees, the kind which have been around for a long time with large strong trunks, and roots deep in the earth. The contrasting image therefore was obviously a dying or dead tree, at the end of its days.
My idea was to try and add to the strength/weakness in the images by showing strong, bright and healthy colours in the 'strong' image and dull, washed out colours in the 'weak' image. I decided to try and capture a strong tree surrounded by saturated autumn colours, and conversly a dead tree in a much darker and duller environment.
When processing the raw files I added to these effects. I saturated the colours in the strong image to make it more vibrant, healthy and 'alive'. For the weak image I did the opposite and removed a lot of the colour. I didn't want a black and white image, but one in which the colours were very subdued and dark, leaving the image as the life had left the tree.
Image taken at f/11, 1/20 sec, ISO-100 and 47mm.
Image taken at f/3.5, 1/100 sec, ISO-800 and 21mm.