La verdad no pongo en duda que tenga los Mpx anunciados, a lo que me refiero es que aunque no los tenga es posible que igual deba interpolar para eliminar las interferencias entre ellos eliminando el ruido pero suavizando la imagen (pérdida de nitidez)
Acá un poco en inglés respecto de los problemas de tener mucha densidad de megapixeles, es decir muchos Mpx en un sensor muy chico:
Try to imagine how small a ten-millionth of a square inch is. No, don’t bother. It’s insanely small. In fact, using current limits of technology, it’s barely enough area for capturing sufficient photons for a useful sample of light.
So when a pixel in your sensor gets too small, it might get things wrong. Instead of registering a green pixel for an area of grass, it might not capture enough of that green light, and so it bungles things and records a red pixel instead. Or a white pixel in an area that was supposed to be in shadow. Your photo starts getting speckled with pixels of the wrong tone. That speckling is called noise and too much noise will greatly reduce the image quality in your photos.
Can you see now, how too high a megapixel count can sometimes result in lower image quality?
This is why compact cameras, which have very small sensors combined with unrealistically high megapixel counts, tend to produce noisy photos, especially in the shadow areas and weak-light situations where there just aren’t enough photons landing on those miniscule sensor pixels.
Now, the clever boffins who make the cameras’ sensors are getting better at their job all the time, and the sizes down to which they shrink those pixels are getting smaller and smaller. Also, I think it is fair to say that some brands of camera appear to perform better than others. But some of those marketing types all too often push for megapixel counts in excess of what even those smart boffins can handle. And for what benefit? In my opinion it is just for some sort of shallow advertising claims or an excuse to get you to pay more for your camera.
And a bit of yes and noWhen you reduce your image size in your image-editing software, some of the noise tends to go away. Shrink your images down enough and noise pretty much disappears altogether. So, a large photo with a bit of noise can be shrunk, and sometimes end up with the same image quality as a less-noisy photo taken at lower resolution.
For this reason, some people argue that more pixels are better, because in good light you get great pics. And in low light you just sacrifice some image size later on. The question is, how much you have to reduce your images to make them usable.
How much noise is okay?If you print your photo and it looks great, then obviously the amount of noise in your photo is acceptable. Too much noise though, and you will notice colours starting to look wrong and details disappearing.
But the good news: the camera manufacturers are well aware of these issues and have some great people working on sensor design, which means cameras should keep getting better.
So is it yes, or no?Perhaps the maths at the beginning of this article was a bit boring. But it doesn’t take much number-crunching to see there
saludos
