View Add/Edit Patient Images screen, Image Effects screen. View Video, 1 min. 43 sec.

Auto Contrast
Click the Auto Contrast button once and an internal contrast mechanism will give the image what it thinks is the best contrast setting. If you like the results, keep this modification, if not click Reset to undo the changes.

Equalize
The Equalize method is often the most effective function for bringing out hidden details through contrast improvement, especially in dark areas. Equalize will often enable you to see differences that were too subtle in the original. Although it can be used for both color and grayscale, it is most effective for grayscale images like x-rays. Look at the before and after effects on this panorex sample.

Color Balance
Like Light Balance described earlier, Color Balance screen displays an adjustor window with three slider controls. You may increase or decrease the red, green, and blue color content of an image. All color is made from a combination of red, green, and blue (RGB) and this control can be used to correct images where the color seems to be “off.”

Color Intensity
The Color Intensity screen is another way of adjusting the color of an image. It consists of a balance among Hue, Saturation, and Luminance.

Hue
You need to picture Hue as existing as a wheel. The wheel goes from magenta to red to yellow to green to cyan to blue and back to magenta. The Hue control is a linear slider with the normal position at zero. As you move the slider from 0 you start proceeding around the wheel. A little to the right makes the image more magenta. A little more makes the image more red. A little more makes it yellowish, etc. When you come to 100 you have traveled all the way around the wheel and you are back at the normal position or zero. So the zero position and the 100 position are both the normal position. Likewise, the -100 position is also the normal position.

Saturation
Saturation is a measure of how much color an image contains. Zero is the normal point. -100 will be no color and 100 will display very rich color. If you have a color image and move the Saturation to -100 it will look like a grayscale image (no color).

Luminance
With Luminance, zero is once again the normal point. Move the slider to the right (higher) to make the image brighter and move it to the left (lower) to make the image darker. Luminance and Brightness are related but are not identical. They do both, however, make the image lighter and darker.