MicrostockGroup Sponsors


Author Topic: how many MegaPixels for Alamy after the change ?  (Read 3658 times)

0 Members and 1 Guest are viewing this topic.

« on: August 19, 2010, 06:45 »
0
6 MP ? 8 MP ?
Has anybody counted precisely ?

Thanks ;)


« Reply #1 on: August 19, 2010, 06:59 »
0
A little bit above 8 MP.
My Canon 30D produces 8,2 MP and needs a tiny little bit of upsizing.

You can easily calculate:
They want 24 MB uncompressed, i.e. 24 x 1024 x 1024 = 25.165.824 Bytes.
As an (uncompressed) 8-bit Jpeg needs 3 Bytes per pixel, you end up with 25.165.824 / 3 = 8.388.608 Pixels.

And as camera makers normally mean exactly one million pixels when using "Megapixel" (wheres in computers when talking about kilobytes or megabytes you are using powers of 2, so one kilobyte = 1024 bytes, one megabyte = 1024 kilobytes) , your camera would need 8.4 MP so you don't have to upsize for the 24 MB uncompressed size.


 

Related Topics

  Subject / Started by Replies Last post
46 Replies
13404 Views
Last post February 12, 2008, 09:02
by kosmikkreeper
24 Replies
8615 Views
Last post July 12, 2012, 09:27
by ShadySue
5 Replies
2644 Views
Last post April 20, 2014, 02:40
by danielsbfoto
13 Replies
4821 Views
Last post April 24, 2017, 16:15
by pancaketom
169 Replies
25000 Views
Last post August 26, 2019, 17:22
by Amanda_K

Sponsors

Mega Bundle of 5,900+ Professional Lightroom Presets

Microstock Poll Results

Sponsors

3100 Posing Cards Bundle