As part of our test we shoot our resolution chart at very sensitivity setting. The higher the value quoted in the caption score, the better the image quality.
If you view our crops of the resolution chart's central section at 100% (or Actual Pixels) you will see that, for example, at ISO 100 the Canon PowerShot S100 is capable of resolving up to around 20 (line widths per picture height x100) in its highest quality JPEG files.
For a full explanation of what our resolution charts mean, and how to read them please click here to read the full article.
Examining images of the chart taken at each sensitivity setting reveals the following resolution scores in line widths per picture height x100:
ISO 80, score: 20 (see full image)
ISO 100: score 20 (see full image)
ISO 200: score 18 (see full image)
ISO 400: score 16 (see full image)
ISO 800: score 14 (see full image)
ISO 1600: score 12 (see full image)
ISO 3200: score n/a (see full image)