FIGURE 1.

At low resolution (standing far from picture), differing contrasts contribute to the identification of objects within the picture. The hat, dress and grassy surroundings are clear features of the paintings with differing contrasts. Under close inspection (high resolution), only high contrast differences, such as the blue dress, allow for individual features to be distinguishable whereas differences with low contrast (boxed region) become difficult to discern. The difficulty of identifying the hat against the grassy background is analogous to the electron density contrast becoming continuous between the particle and solvent for flexible systems. This image was adapted from Matin a Eragny by Camille Pissarro and kindly prepared by Mike Pique at the Scripps Research Institute.