PanGazer logo PanGazer – enhance

Introduction

Download PanGazer


Getting started

General settings

Enhancements

Compass points


Making panoramic images

Command line options

The gnomonic projection

Thanks

PanGazer’s image enhancements let you change the presentation of an image (brightness, etc.) to help you identify features of interest. Like the controls on a TV or computer monitor they let you alter your view of the image without changing the image itself.

PanGazer enhancements are intentionally potent; they exaggerate small differences. Other programs are better for fine-tuning an image for publication or printing;  however, you can always save an enhanced view (without the status overlays, etc.) using Save current view as... from the Image or pop-up menus.

 

Enhancements dialog box

Enhancements dialog box

To change enhancements, open the Enhancements dialog box by pressing ‘e’, or by selecting Enhance view from the main Image menu or from the pop-up (right-click) menu.

You can then move any (or all) of the sliders; they all adjust values from −1 through +1, with 0 being the default (no change):

  • Brightness: this adjusts the brightness of the view, with emphasis on revealing detail in shadows when brightness is increased. Reducing brightness is useful for over-exposed areas of images.

  • Contrast: this varies the contrast of the view from no contrast (the view is a flat grey) to maximum contrast (every point in the image is an extreme hue).

  • Warmth: this changes the colour balance of the view from a cold blue-green up to a warm reddish-orange.

  • Saturation: this changes the view from black-and-white (‘monochrome’) to enhanced-intensity colours (as far as can be changed while keeping colours balanced).

The four sliders are independent and have only a small effect on display performance. At any time you can click the Reset button to revert all the enhancements to default (that is, showing the original image, un-enhanced).

Click the Done button, press Enter, or close the dialog box when you no longer wish to see the dialog.

You can use Settings → Status Display → Show enhancement values to have the enhancement values displayed at the top left of the view even when the Enhancements dialog box is not open (this status is only shown when at least one enhancement value is non-zero).

PanGazer and these web pages were written by Mike Cowlishaw; Please send me any corrections, suggestions, etc.
All content © Mike Cowlishaw, 2014–2018, except where marked otherwise. All rights reserved. The pages here, and the PanGazer program, are for non-commercial use only.
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This page was last updated on 2018-09-23 by mfc.