DESC: Pre-Press Technologies, Inc. Spectre PLUG-INS for Adobe Photoshop - MAC. Color Correction Filter. Unsharp MaskingFilter. On-line densitometer provides corrected readings of the process colors. Define, name and save color correction settings. Preview your settings with a before and after display prior to correcting your image. Color correction table displays before and after swatches and shows the CMYK values of colors that are being corrected. Change the range of color correction by adjusting a depth variable. Precisely control sharpening and smoothing. Define and save new unsharp masking setting. Apply corrections to a single, any, or all channels. View your setting with a before and after display.