Amount defines the intensity of the smoothing effect. Threshold automatically defines the image areas to which the filter will be applied. To easy understand how it is works, set the Amount to 100 and play with different Threshold values. Threshold range is 0-100. Sharpen filte r - The Sharpen filter accentuates the edges in the image by finding the edges and increasing the contrast between adjacent pixels.
Amount defines the sharpness level.
Amount range is 0-100. Threshold automatically defines the image areas to which the filter will be applied. To easy understand how it is works, set the Amount to 100 and play with different Threshold values. Threshold range is 0-100. The Despeckle filter applies a soft, blurred effect to your image.