Timeline for Which of these two metrics is a good measurement of sharpness?
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| Sep 8, 2014 at 2:46 | comment | added | Kartick Vaddadi | Sure, I'll take a look at that link. Thanks for your help so far. But I hope I have clarified what it is I'm looking for, in terms of being able to see the difference on an 8MP monitor. I not looking at the nuances of resolution vs sharpness here, or digging into these ultra-technical details. | |
| Sep 7, 2014 at 14:48 | comment | added | JenSCDC | "Put differently..." I'm not knowledgeable enough to properly respond to this. Somebody who knows more will have to take it. | |
| Sep 7, 2014 at 14:31 | comment | added | JenSCDC | Here's a very good source explaining sharpness and other image quality factors: imatest.com/support/image-quality It explains thing much better than I can. | |
| Sep 7, 2014 at 13:01 | comment | added | Kartick Vaddadi | Put differently, if I'm viewing my photos on an 8MP monitor, scaled to fit the monitor, then I shouldn't be able to see the difference between an 8MP camera and a 16MP one, but I should definitely be able to see the difference between a 3 and an 8 MP camera. | |
| Sep 7, 2014 at 12:59 | comment | added | Kartick Vaddadi | I'd linked to Dxomark's explanation of perceptual megapixels in the question, and here it is again: dxomark.com/Reviews/… Naively, it's just about the number of pixels of actual information captured. If I make a put a crappy lens on a 60MP sensor, it's not going to be able to capture 60MP worth of information. Alternatively, if I make the 60MP sensor tiny, then even with a great lens, the size of the airy disks is going to be larger than those of the sensels. Hope that helps. | |
| Sep 7, 2014 at 8:58 | history | edited | JenSCDC | CC BY-SA 3.0 |
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| Sep 7, 2014 at 8:56 | comment | added | JenSCDC | But you're talking about resolution, not perceived sharpness. I might not have explained the difference between sharpness and resolution as as well as I could have. | |
| Sep 5, 2014 at 16:51 | history | edited | JenSCDC | CC BY-SA 3.0 |
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| Sep 5, 2014 at 16:45 | history | edited | JenSCDC | CC BY-SA 3.0 |
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| Sep 5, 2014 at 16:40 | history | edited | JenSCDC | CC BY-SA 3.0 |
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| Sep 5, 2014 at 16:23 | comment | added | Kartick Vaddadi | Squaring the number of lines the camera can resolve, we end up with a score of 22^2 = 484 for the Lumix, and 26^2 = 676 for the Sony. This is a difference of 40%, while the perceptual megapixel numbers indicate a 6x difference. So the square vs square root thing doesn't really change much, does it? | |
| Sep 5, 2014 at 16:16 | history | edited | JenSCDC | CC BY-SA 3.0 |
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| Sep 5, 2014 at 16:00 | history | edited | JenSCDC | CC BY-SA 3.0 |
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| Sep 5, 2014 at 15:53 | history | answered | JenSCDC | CC BY-SA 3.0 |