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Sample Images

The two images below will be used throughout this part of the web site.  The first is a color chart as shown in Figure 1.  There are eight rows labeled A through H.  Row A is the color red.  Row B is green.  Row C is blue.  Row D is cyan.  Row E is magenta.  Row F is yellow.  Row G is grayscale.  Row H is a series of mixed colors.

The columns for rows A through G approximate the Zone System.  Column X, all rows, has the same Curves value of 255.  Column IX, rows A through G, has the same Curves value of 230.  Column VIII, rows A through G, has the same Curves value of 204.  Column VII, rows A through G, has the same Curves value of 179.  Column VI, rows A through G, has the same Curves value of 153.  Column V, rows A through G, has the same Curves value of 127.  Column IV, rows A through G, has the same Curves value of 102.  Column III, rows A through G, has the same Curves value of 77.  Column II, rows A through G, has the same Curves value of 51.  Column I, rows A through G, has the same Curves value of 26.  Column 0, all rows, has the same Curves value of 0.

Color Chart Figure 1.  Color Chart

Flowers and shrubs Figure 2.  Flowers Shrubs and Trees

The second image, Figure 2, is of flowering shrubs and trees.  I chose this image because it contains the primary colors and their complements.  The sky is blue and cyan.  The pine trees and grass are green.  The smallest flowering shrub has red flowers.  The redbud tree flowers are magenta.  The flowering forsythia is yellow.

To show what these images look like in black and white, they were converted using one of the Tone Management System methods that retains measured luminance.  The result is in Figure 3.  As we can see in the chart, since column IX, rows A - G had the same Curves tone, they were converted to the same black and white tone, which is as expected.  The same is true for columns VIII to 0.  As a reminder, the column title, X to 0 is the Zone System number.  Row H contains selected colors and the tones are not the same as in the rest of the columns.  To recap, Figure 3 is an accurate conversion of tone as measured by the Curves control.

Black and White

Figure 3.  If we accurately convert the color chart in Figure 1 to retain measured luminance, it should look like this.