Image can safely be considered as a signal. In fact it is a a signal.
So as a signal, it can also be operated in both spatial domain and frequency domain. we will not discuss here much about mathematical transforms rather their implementation. And this is the approach for learning with fun.
As described an image of any format can be read and operated.
Textually it may be difficult to enhance image.
But its very easy and interesting too.
lets first learn about Histogram of an image.
Histogram gives a quick idea about how the intensity value is distributed.
Why an image looks bad ??
Its very simple to look and say a good picture and a bad picture.
But what makes an image bad, too bad , good and too good.
Actually its pixel or intensity distribution only.....!!!!!!!!!!!