Digital Photography/Post Processing
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Post procesing is generally done in image editors that have features such as grain and red-eye removal, for example, the Gimp(free), or Adobe Photoshop, or Photoshop Elements.
[edit] Removing red-eye
It's much better to avoid red-eye than to try and remove it in post-processing, as red-eye means you lose the color details of your subjects eyes and can't recover it.
Basically it is done by replacing the red flare with black and adding a white high light to the black dot.
Some Photo-Editing programs provide "Red-eye" removal effects.
[edit] Adjusting Colour balance
When photos are taken, some colours often do not appear real. This can be adjusted using the softwares above. Microsoft Photo Editor, for instance, allows you to balance individual colours and preview them before okaying them.
[edit] Converting to black and white
Many times one can emphasize certain picture by converting it to gray-scale. There are various ways of doing so depending on software being used.
- Converting layer from RGB to Gray-scale
- Desaturating
- Decomposing to HSV or RGB and using one or more layers to compose the image