Adobe 25520388 User Guide - Page 358

USING ADOBE PREMIERE PRO 353 Effects and transitions Brightness & Contrast effect The Brightness & Contrast effect adjusts the brightness and contrast of an entire clip. The default value of 0.0 indicates that no change is made. Using the Brightness & Contrast effect is the easiest way to make simple adjustments to the tonal range of the image. It adjusts all pixel values in the image at once-highlights, shadows, and midtones. Andrew Devis from Creative Cow demonstrates in this video why the Brightness & Contrast effect may not be the best choice and provides an alternative option for better results. Original (left) and with Brightness & Contrast effect applied (right) Broadcast Colors effect The Broadcast Colors effect alters pixel color values to keep signal amplitudes within the range allowed for broadcast television. Use the Key Out Unsafe and Key Out Safe settings for How To Make Color Safe to determine which portions of the image are affected by the Broadcast Colors effect at the current settings. Broadcast Locale The broadcast standard for your intended output. NTSC (National Television Standards Committee) is the North American standard and is also used in Japan. PAL (Phase Alternating Line) is used in most of Western Europe and South America. How To Make Color Safe How to reduce signal amplitude: • Reduce Luminance Reduces a pixel's brightness by moving it toward black. This setting is the default. • Reduce Saturation Moves the pixel's color toward a gray of similar brightness, making the pixel less colorful. For the same IRE level, reducing saturation alters the image more noticeably than does reducing luminance. Maximum Signal Amplitude (IRE) The maximum amplitude of the signal in IRE units. A pixel with a magnitude above this value is altered. The default is 110. Lower values affect the image more noticeably; higher values are more risky. Change Color effect The Change Color effect adjusts the hue, lightness, and saturation of a range of colors. View Corrected Layer shows the results of the Change Color effect. Color Correction Mask shows the areas of the layer that will be changed. White areas in the color correction mask are changed the most, and dark areas are changed the least. Hue Transform The amount, in degrees, to adjust hue. Lightness Transform Positive values brighten the matched pixels; negative values darken them. Saturation Transform Positive values increase saturation of matched pixels (moving toward pure color); negative values decrease saturation of matched pixels (moving toward gray). Color To Change The central color in the range to be changed. Matching Tolerance How much colors can differ from Color To Match and still be matched. Matching Softness The amount that unmatched pixels are affected by the effect, in proportion to their similarity to Color To Match. Last updated 1/16/2012