This dialog box allows you to select a filter for processing the current image (or group of images in batch processing).
Category. Select the type of filter you wish to apply. Some types available are: Blur, Edge Detection, Edge Process, Effects, Noise and Sharpen.
Filter. Select the specific filter from that category. A sample of the results of the filter will be shown in the preview to the right.
Diameter. For statistical and morphological filters, you may select the diameter of the aperture to use for processing. Larger apertures will produce more profound effects.
Radius/Strength/Size/Brush/Levels/Threshold. Some filters will have one of these additional parameters. Specify a value for the parameter in the range displayed to the right of the edit control.
Apply to. Select the channel(s) to apply the filter to. Intensity applies the effect only to the intensity (brightness) of each pixel – the hue is maintained. All channels processes all three channels (red, green and blue) separately. And, for some filter types, you may select only a single color channel (Red, Green, Blue).
Orientation. For linear filters (those defined by a convolution mask) which are not symmetrical, ThumbsPlus can rotate the mask to several positions. Select the arrow which represents the direction you wish to apply the filter.
Modify. Click this button to modify the currently selected filter using the Linear Filter Editor. Note that only linear filters can be modified within ThumbsPlus. Statistical and multipass filters may not.
New. Click this button to add a Linear Filter Editor.