Edit Photos Directly In DSLR cameras: What are the function

Most of us make the process of editing and retouch photos just on the computer, but for those of you who do not yet understand Photoshop or Lightroom, DSLR cameras are also equipped with the ability to edit the image by the camera manufacturer. Although not as advanced picture processing capability photoshop or Lightroom and is not recommended, in-camera photo editing features provide benefits when we really do not have time to sit for long staring at photoshop. The images that have been edited in the camera mercifully kept separately in addition to the original photo, so retouch photos on the camera is not at risk of damaging the original photo.
Here are some functions retouch and edit photos on the average DSLR camera (for this article by Nikon, but you can find similar features on camera DSLR else though different names):

Unless you are the kind of premium lenses are expensive, most likely you will have the image distortion in it. Distortion is faintly visible, but as soon as we capture images of objects which have a lot of elements of a straight line, would be very noticeable distortion (distortion makes straight line looks bent). Using Distortion Control feature on the camera, the camera will minimize the appearance of distortion in an image. See the picture below:

Red-eye removal
When using the default flash camera to take pictures of people in low-light conditions, there is likely to be the eyes of the evil eye (red eyes – red eye.) Red eye is caused by the reflection of light flash in the retina of the eye. To remove red eye, use the correction Red-eye or Red-eye removal (depending on camera type):

Image overlay
This function is more of an effect than retouch, which are stacked one photo above another photo that looked like a multiple exposure function. This function is not very often used, as in the case example is shown below where the two photos stacked produce new photo manipulation:

Filter Effects

This feature makes us as if put forward swept filter lens, some filters that are available include:
Skylight filter: removes most of the color blue.
Warm-up filters: make a photo look warmer.
Red filters: red reinforces
Blue Filter
Cross screen filters: making fluorescent light source has such a star
Soft: create a soft focus
If your photo has a sloping horizon line, straighten feature can be used to straighten the horizon up to ± 5%. Note that the more oblique image, the more parts of the image to be cut.
Perspective Control
If you are photographing buildings or architecture and building in the photo looks tapered or inflated, use this feature.

Okay, good luck.