Well.. Here is how the whole story started. I posted an image on avian forum in which I thought both birds were sharp. Link here
http://www.birdphotographers.net/for...ad.php?t=42612
I have a Sony Vaio 13.3" laptop (1280x800 resolution and a pixel size of 0.2238 mm). I use a 19" Dell LCD monitor (1440 x 900 resolution and a pixel size 0.2842 mm) as external display primary display and extend desktop to 13" screen. So technically my 19" LCD monitor is the primary display unit.
Today I received quite a few critics saying both subject heads are too soft and Arite posted both heads are petty sharp. I did some research trying to understand why same image looked sharp to me and Arite not to others.
I studied the image of 4 different monitors with different resolution and pixel size. Later on I followed instruction from an online tutorial with calibration images and calibrated my monitor and I was stunned with the results. I will post link to the tutorial at the end of the message.
Monitor 1.
Dell laptop Screen -17" Resolution - 1440 x 900 Pixel size - 0.2543 mm
Image looked really soft. Did not see any details in the head.
Monitor 2
Dell LCD Screen -21" Resolution - 1680 x 1050 Pixel Size - 0.2692 mm
Better than 17" but not as good as 19" Monitor.
Monitor 3
Dell LCD Screen -19" Resolution - 1440 x 900 Pixel Size - 0.2842 mm
More or less same as what I saw on my screen.
I called couple of my co-workers and asked their opinion. Both of them express the same opinion.
Monitor 4
Sony Vaio LCD Screen - 13.3" Resolution - 1280x800 Pixel Size - 0.2238 mm
I was shocked to see image looked much sharper than the one on 19" monitor.
I came to a concussion that pixel size will effect the image sharpness. One can not judge image sharpness based on jpg image unless they have same resolution and pixel size.
While doing some more research on the same topic I ran into the following tutorial
http://www.lagom.nl/lcd-test/sharpness.php
I followed the instructions and calibrated my 13" laptop screen to show complete gray screen shown in second image. Another surprise, my image looked much sharper than before. Not only mine but I could see difference in every image.
Artie saw the same image at 21" screen 1680 X 1050 resolution with pixel size 0.2692 mm sharper than others.
In conclusion, looks like resolution, pixel size and sharpness settings governs how good you see original image. Unless we are using the same resolutions, pixels and sharpness settings we can not accurately judge image sharpness.
Any thoughts on this?
PS: I completely agree with anyone who says my image is not sharp. Objective behind this process is to figure out why there are so many different responses to one single image with respect to sharpness.
-Sid







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