The Tone System by Roland Miller

Color Correction

The Tone System Color Correction Routine is a system for color correcting digital images and mapping tonal range to specific output devices. This is a six-step process for correcting the color bias of digitized images. All capture devices lend their own color bias to the image being digitized based on lighting, capture device settings, and inherent aspects of capture technology.

By following the six-step Tone System Color Correction Routine and applying visual evaluation results from the Precision White and Black Point Parameter Targets, photographers and digital printers can achieve more accurate color, richer tonal ranges, and better shadow and highlight detail in their digitally produced images.

In addition to accurate color representation, images processed with the Tone System Color Correction Routine and systemized with Precision White and Black Point Parameter Targets can achieve full scale, full substance tonal rendition.

With a bit of practice and understanding, the Tone System Color Correction Routine can correct most digital image color issues.

The Tone System Six Steps

Click on a step link below.

1. White Point Setting (Highlight Tone)
2. Black Point Setting (Shadow Tone)
3. Midpoint Tone Setting (Density Correction)
4. 1/4 and 3/4 Tone Settings (Contrast Correction)
5. Individual Channel Tone Settings (Color Cast Correction)
6. Saturation Setting (Color Purity/Neutrality)

Sample Image

We will use the following image to demonstrate the Tone System Color Correction Routine. The original image is near to correct color, but you will notice subtle improvements as the steps progress.

Original image                                                                  Image after Six-Step Color Correction

Color correction Steps  White Point • Black Point • Density • Contrast • Color Cast • Saturation