Pre-Gain is typically used in conjunction with the Offset adjustments to balance the overall luminance, red, green, and blue levels in an image. The Pre-Gain adjustments allow you to scale the individual color channels around preset pivot points, which are determined by the black and white level pivot point (described in the PIVOTS section below). These behave like all other Numerical Slates in SCRATCH. You can also adjust the sliders using the Numerical Slates at the bottom of each slider. This menu is covered in detail later in this chapter. Note: The Offset can be calibrated to match the specifications of a film lab by adjusting the Luma Weight and Print Light settings in the Config/Options menu of the Matrix. » Modifies the sensitivity of the SlidersĬlicking on the small arrows at the top and bottom of each slider adjusts the slider by a preset amount. Use the Quick Key: Shift to alter the responsiveness of the sliders. The sliders can be adjusted by clicking and dragging the hash mark indicator within the slider. The total range of color and luminance remains the same but the values are increased or decreased by the offset amount.
By adjusting the sliders, you can shift the overall image towards a certain color or luminance. The Offset controls are similar to the traditional Hazeltine printer-light controls from optical color timing. This is done so that Gamma adjustments do not skew the image further into the green as the Gamma is increased. In this way, they can be used to adjust and/or neutralize the image’s color so that the subsequent color adjustments properly track throughout their range.įor example, if an image is skewed slightly into the green, a Pre-Gain and Offset adjustment can correct the skew. The Offset and Pre-Gain sliders are used to affect an overall change to the image before any of the Color menu adjustments are applied.
0 kommentar(er)
