The Filter panel can be launched by selecting "Filter" from the "Tools" pull-down menu on the main ImageWorks window. The Filter panel consists of three main areas containing the selection for the input and output channels, the filter size and the filter type. Launching the Filter panel will also display a Filter preview panel that provides a preview of the filtered result.
The Filter Preview panel contains a "Close" button, an enhancement option, and a "Zoom" option menu. This panel displays the result of any selected filter from the Filter panel. The user can examine the filtered image in the preview window before applying the filter operation on the main ImageWorks window.
The Input/Output Channel Selection area contains three option menus. The image plane that needs to be filtered is specified by selecting the first option menu. There is a "Showing" option for the input image that allows the user to apply a filtering operation on the currently visible image plane(s). This option will automatically set the output option to "Showing" to display the filtered result.
The resulting filtered image is written to the output image plane specified by the output option menu. Any existing image in the output image plane will be overwritten by the filtering result.
The Mask option specifies whether the filter is applied to the entire image or under a specific graphic plane. Only one graphic plane can be specified at a time.
The filter size area displays the dimensions of the filter. The user can either select one of the listed square filters, or enter a specific filter size between the up and down arrow buttons. The filter dimensions must be expressed in odd numbers, in the range 1 to 33. The dimensions specify the number of pixels by the number lines. The filter size need not be square
The third area of the Filter panel contains a list of filter operations that can be applied to an image. See the subtopics for more information about each type of filter.
There is an "Apply" push button on the Filter panel that will apply the selected filter operation on the main ImageWorks window.