
Here is a easy step of making “Miniature Like” image with my TiltShift Generator. Please fix my crappy English. :-(
If you don’t have an iPhone version, you can use my free online TiltShift Generator made with Flash.

Remove Atmosphere Effect
In our world atmosphere affects an image. It desaturates color of far location. On the other side, in miniature world, there is no atmosphere affection against color, because it is so close to our eyes.
To remove atmosphere effect, simply we apply strong saturation and contrast to the image.

Basically far place is not so vivid, because of the air layer.

To fix problem, we use strong saturation and contrast.
Changing focus and depth
If you see the something that is placed far place. You can clearly see many object around that one. However, if you see something that is very close to you. You can only see that object and any other things in your sight will be blurred.
Only focus on what you want to show, and keep any other background and foreground blurred.

Foreground and background are blurred. Because our range of focus should be very limited when we see small thing.
Camera angle
When you see a miniature, you will look down object from higher place. It is easy to miniaturerize if the image is taken from higher place and contains many objects. If image is taken by ground level and only contains close objects, it might be bit difficult to miniaturerize.

If you take a picture on the building or above the hill, it is very easy.
That’s it! Sometimes you can ignore those theory, if braking rule brings better results.
Try and enjoy :-)