How Does A Digital Camera Work

How Does A Digital Camera Work



How Does a​ Digital Camera Work?
Before getting to​ see how a​ digital camera works, let’s begin by saying that a​ digital camera differs from a​ classical one primary through its storage capabilities .​
Imagine that using your old classic 35 mm camera you could make n pictures (for example 36) on a​ film before having to​ stop making pictures and​ change the​ film .​
This inconvenient is​ no more present with digital cameras because you have so much space available that you could do several hundred pictures before having to​ empty your card and​ if​ this thing is​ annoying imagine a​ portable drive with so much space that you even forget the​ meaning of​ spaceless .​
Here is​ how a​ digital camera works.
Until now we concluded that the​ biggest difference between classical cameras and​ digital ones is​ available space but is​ this all? the​ answer is​ a​ simple NO; I​ suppose you heard many times the​ word mega pixel when speaking of​ digital camera, but what is​ it? a​ digital camera works on the​ basis of​ stimuli that an​ incorporated sensor receives.
In a​ digital camera the​ light excites a​ digital sensor which is​ a​ very small computer; this sensor is​ composed of​ millions of​ tiny sensors called pixel, a​ pixel means picture elements .​
It is​ on due to​ pixel structure that a​ digital camera works.
These many small sensors make up a​ sort of​ table that has a​ vertical and​ horizontal length, so if​ I​ say that my camera has N pixels width * M pixels height = K this number K is​ the​ Megapixel that we’ve heard so many people speak about .​
So is​ this all the​ mechanism that shows how a​ digital camera works?
So mega pixels are made of​ millions of​ small dots, so more pixels means more mega pixels, hence means a​ higher quality picture, but a​ more expensive camera .​
After the​ light has reached the​ sensor it​ goes through several filters until it​ becomes a​ digital signal .​
This doesn’t tell us all about how a​ digital camera works.
Another set of​ filters is​ applied for​ white balance, color and​ aliasing .​
At the​ end of​ this process the​ image is​ made as​ small as​ possible with a​ technique of​ erasing unnecessary pixels .​
Next the​ image gets into the​ buffer, and​ when the​ buffer has completed loading the​ image it​ writes it​ on an​ external memory like a​ card .​
Basically this is​ the​ secret of​ how a​ digital camera works.
Now I​ will tell you a​ few words about the​ legendary zoom that usually makes the​ difference between a​ cheep and​ an​ expensive camera .​
The digital zoom is​ a​ fake zoom because it​ simply enlarges the​ pixels that make up the​ photo so … you can’t imagine the​ result .​
How does a​ digital camera zoom work? An optical zoom is​ a​ different thing, because you can change the​ field of​ view for​ widening out for​ a​ landscape photo or​ zoom on for​ a​ nice portrait .​
All this is​ realized by moving the​ lens elements to​ change the​ focal length .​
So if​ you like to​ take nice photos look for​ the​ optical zoom, remember that the​ digital one is​ just for​ the​ seller to​ tell you that it’s not such a​ bad deal to​ buy a​ camera that has a​ zoom of​ 5 .​
Always ask and​ test how the​ digital camera works.




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