Editing Photos
Important Note: Gamma Settings
Different platforms and devices use a different base gamma. Gamma is a measure of contrast in an image, typically in the midrange grays (mid-tones). The higher the gamma, the darker the tone. For example, Mac OS use a gamma base value of 1.8 and Windows use a gamma base value that varies around 2.2. The result of this difference is that images look darker on Windows than on Mac OS.
Most image editing programs come with a gamma control panel which lets you adjust your monitor’s gamma. This means you can simulate the way an image will appear on different platforms. Furthermore, you can use Document Color Profile or Use Embedded Color Profile Adjusts the gamma to match any attached document colour profile in a color-managed document.
Cropping Images
Cropping Images. Sometimes you might need to crop your image to strengthen its composition. Try and crop your image as little as possible. You can crop an image by using the Crop tool or by selecting an area and then applying the Crop command. You should…
Levels
Levels. The Levels dialog box lets you correct the tonal range and colour balance of an image by adjusting intensity levels of image shadows, midtones, and highlights. Select Image menu…
Color Balance
Colour Balance. The Colour Balance command changes the overall mixture of colours in an image for generalised colour correction and is very valuable when correcting underwater images. Select Image menu…
Sharpening
Sharpening. There are a many methods to sharpen your image. In this section I will introduce three of them. You can apply the sharpening to the entire image or create a mask to apply it selectively…
Selective Color
Selective Color. Selective Color allows you to modify the amount of a process colour in any primary colour—without affecting the other primary colours. Do one of the following:…
Spot Healing Brush and Patch Tools
Spot Healing Brush and Patch Tool. The Spot Healing Brush tool quickly removes blemishes and other imperfections. It paints with sampled pixels from neighbouring pixel without requiring you to specify a sample spot…
Adjustment Layers
Adjustment Layers. An adjustment layer applies colour and tonal adjustments to your image without permanently changing pixel values. For example, rather than making a Levels adjustment directly on your image, you can create a Levels adjustment layer…
Adobe Bridge
Adobe Bridge Adobe Bridge is a great tool to organise, browse, and locate your photos. In Adobe Bridge, you can view, search, sort, manage, and process image files. You can use Bridge to create new folders…