HomePhotoshop DiscussionsSimple question: pixels vs file size Simple question: pixels vs file size A Posted By Arizona Sep 12, 2004 Views 575 Replies 10 Status Closed Why would a 2510 by 1960 image take 14.1MB in its uncompressed mode? What’s the math? MacBook Pro 16” Mockups 🔥 – in 4 materials (clay versions included) – 12 scenes – 48 MacBook Pro 16″ mockups – 6000 x 4500 px S Sanders Sep 12, 2004 On Sun, 12 Sep 2004 14:39:57 GMT, Arizona wrote: Why would a 2510 by 1960 image take 14.1MB in its uncompressed mode? What’s the math?**************** The math is: 2510 x 1960 x bit depth (8) x number of channels (3) / 8192 = Kilobytes Divide that by 1000 for MB. –sanders e-mail?Please erase theboard N nomail Sep 12, 2004 Arizona wrote: Why would a 2510 by 1960 image take 14.1MB in its uncompressed mode? What’s the math? 2510 x 1960 = 4919600 pixels. One pixel is 3 bytes if the image is 8 bits per pixel, so 4919600 pixels = 14758800 bytes = 14.0751 MB.— Johan W. Elzenga johan<<at>>johanfoto.nl Editor / Photographer http://www.johanfoto.nl/ A anyone Sep 12, 2004 On Sun, 12 Sep 2004 15:08:33 GMT, Sanders wrote: On Sun, 12 Sep 2004 14:39:57 GMT, Arizona wrote: Why would a 2510 by 1960 image take 14.1MB in its uncompressed mode? What’s the math?**************** The math is: 2510 x 1960 x bit depth (8) x number of channels (3) / 8192 = Kilobytes Divide that by 1000 for MB. What’s 8192? S Sanders Sep 12, 2004 On Sun, 12 Sep 2004 14:39:57 GMT, Arizona wrote: Why would a 2510 by 1960 image take 14.1MB in its uncompressed mode? What’s the math?To be precise: There are 8,192 bits in a kilobyte, not 8,000 –sanders e-mail?Please erase theboard N nomail Sep 12, 2004 Johan W. Elzenga wrote: Arizona wrote: Why would a 2510 by 1960 image take 14.1MB in its uncompressed mode? What’s the math? 2510 x 1960 = 4919600 pixels. One pixel is 3 bytes if the image is 8 bits per pixel, so 4919600 pixels = 14758800 bytes = 14.0751 MB. Oops. Read "if the image is 8 bits per COLOR", not per pixel. — Johan W. Elzenga johan<<at>>johanfoto.nl Editor / Photographer http://www.johanfoto.nl/ N nospam Sep 13, 2004 On Sun, 12 Sep 2004 20:57:35 GMT, Sanders wrote (with possible editing): On Sun, 12 Sep 2004 14:39:57 GMT, Arizona wrote: Why would a 2510 by 1960 image take 14.1MB in its uncompressed mode? What’s the math?To be precise: There are 8,192 bits in a kilobyte, not 8,000 –sanders e-mail?Please erase theboard I always thought there were 1024 bits in a kilobyte. — Larry Email to rapp at lmr dot com AA Aki Ahonen Sep 13, 2004 "L. M. Rappaport" wrote in message On Sun, 12 Sep 2004 20:57:35 GMT, Sanders wrote (with possible editing): On Sun, 12 Sep 2004 14:39:57 GMT, Arizona wrote: Why would a 2510 by 1960 image take 14.1MB in its uncompressed mode? What’s the math?To be precise: There are 8,192 bits in a kilobyte, not 8,000 –sanders e-mail?Please erase theboard I always thought there were 1024 bits in a kilobyte. — Larry Email to rapp at lmr dot com 1024 bits in kilobit bit=1/8Byte so 1kilobyte=1024x8bits –Aki Ahonen C Carlos Sep 13, 2004 Hi The math is: 2510 x 1960 x bit depth (8) x number of channels (3) / 8192 = Kilobytes That is correct. Divide that by 1000 for MB.This is incorrect. You must divide by 1024 for Mbytes. Carlos"Sanders" wrote in message On Sun, 12 Sep 2004 14:39:57 GMT, Arizona wrote: Why would a 2510 by 1960 image take 14.1MB in its uncompressed mode? What’s the math?**************** The math is: 2510 x 1960 x bit depth (8) x number of channels (3) / 8192 = Kilobytes Divide that by 1000 for MB. –sanders e-mail?Please erase theboard C Carlos Sep 13, 2004 Hi I always thought there were 1024 bits in a kilobyte. 1 byte = 8 bits 1 Kbyte = 1024 bytes = 8 x 1024 bits = 8192 bits. Carlos "L. M. Rappaport" wrote in message On Sun, 12 Sep 2004 20:57:35 GMT, Sanders wrote (with possible editing): On Sun, 12 Sep 2004 14:39:57 GMT, Arizona wrote: Why would a 2510 by 1960 image take 14.1MB in its uncompressed mode? What’s the math?To be precise: There are 8,192 bits in a kilobyte, not 8,000 –sanders e-mail?Please erase theboard I always thought there were 1024 bits in a kilobyte. — Larry Email to rapp at lmr dot com N nospam Sep 14, 2004 On Mon, 13 Sep 2004 14:04:09 GMT, "Aki Ahonen" wrote (with possible editing): "L. M. Rappaport" wrote in message On Sun, 12 Sep 2004 20:57:35 GMT, Sanders wrote (with possible editing): On Sun, 12 Sep 2004 14:39:57 GMT, Arizona wrote: Why would a 2510 by 1960 image take 14.1MB in its uncompressed mode? What’s the math?To be precise: There are 8,192 bits in a kilobyte, not 8,000 –sanders e-mail?Please erase theboard I always thought there were 1024 bits in a kilobyte. — Larry Email to rapp at lmr dot com 1024 bits in kilobit bit=1/8Byte so 1kilobyte=1024x8bits –Aki Ahonen You’re right – I should know better. — Larry Email to rapp at lmr dot com How to Improve Photoshop Performance Learn how to optimize Photoshop for maximum speed, troubleshoot common issues, and keep your projects organized so that you can work faster than ever before! 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