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What is the real meaning of resolution in computer vision?

2021-11-25, 12:41 PM

I happened to watch a review and unboxing video for the Lenovo Thinkpad p15s laptop and then the reviewer clicked on Settings and then Display and checked the resolution of the laptop's screen. Windows reported 2560x1440 which is quite big for a laptop screen of that size, the resolution of that laptop's screen size should traditionally be 1366x768, Unless, Screen Dimension is not Screen Resolution,I know the monitor height and width translate or make up what is known as the "Screen Resolution". Unless am wrong.


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Re:What is the real meaning of resolution in computer vision?

2021-11-25, 14:52 PM

Most laptops these days have Full HD (1920x1080) displays or higher (such as 2560x1440 or 3840x2160).

Resolution doesn't refer to the actual size of the display but rather how many pixels are on the display.

Higher resolution on the same size display means that each individual pixel is smaller.


Does that answer your question?

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Re:What is the real meaning of resolution in computer vision?

2021-11-25, 14:52 PM

Welcome to the Community


Resolution isn't tied to screen dimensions with the possible exception of ratio, but as most of today's screens are 16:9 or 16:10, we can ignore that.


In resolution, the first number is the horizontal number of pixels (or dots, if you will) and the second number is the number of vertical pixels, sometimes called lines. So, on your example, the screen can display 1440 lines of 2560 pixels per line. 




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Re:What is the real meaning of resolution in computer vision?

2021-11-25, 14:54 PM

Welcome to the community forum.


It seems to me there are many criteria that one should use in evaluating a screen.


For me what's more important is pixel density, pixels per square centimeter (or square inch.) That gives a better indication of how sharp text and images appear on the screen.


But resolution is also a useful measure of how much data one can fit into the screen. If your eyesight is good enough even a 2560x1440 on a 15" screen may be perfectly readible. When I was younger I did all my work on the native 1600x1200 screen of an A21p ThinkPad. My eyes couldn't deal with that today.


Another criterion is aspect ratio. Many people find the original 4:3 (as in 1600x1200) ratio far more useful than todays 16:10 or 16:9.


And then there are issues like brightness, viewing angle, switching speed, colour reproduction, screen finish (matte vs. glossy), etc.


Incidentally 1368x768 is rather old these days. The minimum for notebook PC screens is now generally FHD or 1920x1080.

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