The Panorama Factory Home

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	Introduction
	Window layout
	Making a panorama, step by step
	Extra steps when working from scanned images
	Menus
	Context menus
	Dialogs
		Trimming properties Film size Focal length Alignment properties Blending properties Fine tuning properties Color tool Histogram panel Resize image Filter control Timing panel Project properties Image properties Project/Image notes
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	Hints, tips and tricks

Filter control dialog box

This dialog controls the 3x3 or 5x5 FIR (Finite Impulse Response) filter coefficients used by the Enhance command. As you change the filter coefficients, The Panorama Factory shows you the effect interactively within the preview rectangle.

The following options allow you to control the filter:

Filter kernel

The 3x3 or 5x5 convolution kernel coefficients.

Filter type

3x3	3x3 FIR filter.
5x5	5x5 FIR filter.
Sharpen	3x3 sharpening filter. This filter is generated automatically from its center coefficient. You can also use the slider to control the center value.

Filter shape

Horizontally symmetric Vertically symmetric Circularly symmetric

	Constrains the filter to have the specified symmetry.
Separable	Constrains the filter be separable. A separable filter can be applied in separate horizontal and vertical passes. This has the potential of improving filtering speed (although The Panorama Factory currently does not take advantage of this).
Normalize	Normalizes the filter coefficients so that the filter neither brightens nor darkens the image (on average). Selecting this option causes The Panorama Factory to divides each filter coefficient by the sum of all coefficients when the filter is applied.

Revised: October 12, 1999