- iPhone Nanite
- 1 Posts
2 Mps with my new Iphone 4s, what gives
I read that my iphone 4s shoots 8 mps. When I downloaded my photos into iphoto and checked out the info of a variety of shots, i noticed the photos range from 1.6 to 2.00 mp.
There is no where in settings to change the resolution. Can any one out there help me or have I been duped by apple, promising me 8 MP camera.
And when I shoot it in HDR it isn't much better
- 12-21-2011, 12:56 AM #2
- 12-21-2011, 07:55 AM #3
- 12-21-2011, 12:41 PM #4
- 12-21-2011, 01:28 PM #5
- 12-21-2011, 01:33 PM #6
- 12-21-2011, 02:11 PM #7
- 12-21-2011, 02:41 PM #8
- 02-12-2012, 02:44 PM #9
I must have it wrong... I thought that each pixel needed so many bits to store information - ie for true color either 24 or 32 bits for each pixel meaning 3 or 4 bytes (not bits) per pixel to define the color associated with it. You get so many colors available depending on the color depth (bits per pixel) more being better quantity of colors (number of colors is 2 ^ number of bits per pixel) this gives a range of colors available.
Possibly, if there are not too many different colors in the picture, the software may chose only so many colors for the palette as more are not needed - keeping the file size lower by switching from a higher color depth to a lower one to save space.
- 02-12-2012, 10:27 PM #10iPhone Beginner
- 91 Posts
There seems to be massive confusion between megapixels and megabytes...
The camera is 8 Megapixels...this is how many "dots" are used to make the picture. So it's 3264 pixels wide and 2448 pixels tall (3264*2448 = 7.99 million pixels. Typically, cameras use 24 bits (3 bytes) per pixel to store the color of each dot. This means every picture would be 8,000,000*3 = 24 Megabytes if just stored in memory directly.
However, the image is COMPRESSED using JPEG compression before storing it. This is indicated by the '.jpg' extension the pictures have when imported to iPhoto or your PC. Hence the photo takes up way less space than it would in it's 'raw' form.
All digital cameras do this. On higher-end point-n-shoot cameras and DSLRs (i.e., not phones), you can tell the camera you want to save the picture in "RAW" format, which stores it uncompressed, but this is very impractical and really only needed by professional photographers.
Last edited by Steve28; 02-12-2012 at 10:31 PM.
- 02-13-2012, 02:41 AM #11