Can we increase a 7 MegaPixel photo to 12MP? Why should we Buy a 12 MegaPixel Camera?

Can we increase a 7 MegaPixel photo to 12MP? if we can improve a photo taken by a 7 MegaPixel Camera & increase the resolution using a software like photoshop?

Comparing EQUAL sized sensors, as in a DSLR, in general, your photos should be somewhat better. And even more so, if printing enlargements. My own experience was going from a 6 Mega-Pixel Nikon D70 to a 12 Mega-Pixel D300. A noticeable improvement. SAME LENS on both cameras.
If you are talking about a "Point & Shoot" camera with a very small sensor I couldn't really answer. In that case more Mega-Pixels may equal more noise.

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edgodoy wrote:
However, is there a way I can increase the number of pictures I can transfer to the New Ipad using Itunes?
I have a Canon 7D and the picture are large.
Step my step instructions, would be great if it is at all possible.
What you as is difficult without knowing your exact circumstances, i.e. what format pictures are you sending, do you shoot in .jpg or shoot in RAW and convert to .jpg, etc. However, I don't see a way to quickly reduce the size of your image files without reprocessing your files in some manner.
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If you images are already exported at a lower quality setting and are still too large the next step would be to reduce the dimensions of the image. Lightroom has this capability. I don't know about Aperture, but I assume it does.
My normal workflow with my 7D:
Take picture in RAW.
Transfer to Lightroom 4 converting the Canon RAW files to Adobe's DNG format.
Process images in Lightroom. If any need further processing then export to Photoshop and/or Nik plug-ins.
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Use iTunes to Sync photos to iPad.
As was mentioned by a previous poster you could use Photoshop to bulk process the photos but that requires both Photoshop and a knowledge of creating a bulk action. Not hard, but very confusing if you haven't used both Photoshop and the bulk process before.
There may be other methods that could work for you but I am not aware of them. With the breadth of experience of the members of this forum perhaps someone else could chime in with suggestions.

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Can we increase a 7 MegaPixel photo to 12MP? Why should we Buy a 12 MegaPixel Camera?

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