Adobe 65021048 User Guide - Page 355

ADOBE PREMIERE PRO CS3 349 User Guide Tuning controls for Pixel Motion interpolation Vector Details Determines how many motion vectors are used during interpolation. The more vectors used, the longer the rendering time. A value of 100 produces one vector per pixel. If a layer has fast-moving motion, it may look better with a lower Vector Detail setting. Smoothing These controls affect the sharpness of the image: • Build From One Image Generates the final output from the closest single frame, as opposed to the closest two frames. This setting results in a sharper image, but jerkier motion. • Correct Luminance Changes Equalizes the luminance between frames before calculating motion. • Filtering The quality of the filtering used to build the interpolated image. Extreme greatly increases rendering time. The Filtering option affects only the sharpness of the final image; use Normal until you're ready for final rendering. Error Threshold Determines the accuracy of pixel matching from one frame to the next. A higher value results in fewer motion vectors and more blending. Note: If you see edge tearing in an image, try increasing the Error Threshold for more blending. If the image has heavy grain, try decreasing the Error Threshold so the low-level motion of the grain will be ignored. Block Size Adjusts the size of the blocks used to calculate the vectors. Weighting Controls the weighting of the red, green, and blue channels in calculations used to analyze the image. For example, setting Red Weight and Green Weight to zero means that only the blue channel is analyzed for motion. Motion Blur controls Shutter Angle Determines the intensity of motion blur. The shutter angle is measured in degrees, simulating the exposure caused by a rotating shutter. Simulated exposure time is determined by dividing the shutter angle by the frame rate times 360°. For example, a shutter angle of 90° causes an exposure of 1/96 of a second per frame: 90°/(360°x24fps). Shutter Samples Controls the quality of the motion blur. A higher value results in a smoother motion blur. Matte, warp, and crop controls Matte Layer The layer to use as a matte for defining the foreground and background areas of an image. White areas in the matte represent the foreground, black areas represent the background, and gray attenuates between foreground and background. Matte Channel The channel to use as a matte. Warp Layer Allows you to warp the layer to which the effect is applied by applying the motion vectors from the layer that you choose. Show Controls the portion of the layer to be time-remapped. Source Crops If your image contains unwanted pixels or artifacts at the edges, use Source Crops controls to specify image boundaries. Pixels from the boundaries are repeated to fill the area beyond the boundaries to the layer's edges. Note: The After Effects Time Warp effect is very similar to Time Warp in Adobe Premiere Pro. See also Time Warp online training video April 1, 2008