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Nairaland Forum / Science/Technology / Phones / What Is Pixel Density (PPI)? What It Means And How To Calculate For It. (1389 Views)
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What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by atheistandproud(m): 10:42am On Jan 11, 2021 |
One of the less advertised specs of smartphone displays is Pixel Density. Manufacturers would quickly advertise screen sizes, display panel types (LCD or AMOLED) and even refresh rates but would quietly slide the display density somewhere and hope that customers don’t notice. Usually it almost always works. So what is Pixel Density then? All displays are made of pixels. Pixel density refers to how close together or far apart the pixels on a smartphone’s display are arranged. In other words, if the pixels on your display are packed very close together, that display has a high pixel density. If the pixels are spread apart, then the pixel density is said to be low. A higher pixel density on a smartphone display means that the user is going to get a lot more detail, sharpness, clarity and resolution in images and videos, better colour representation and contrast. Fonts and lines would look neat and sharp and a better overall image/video quality. A lower pixel density means less details, less sharpness, possible image pixelation and poorer colour representation. Characters, fonts and lines may not look neat and the overall image/video quality. PPI Pixel density is measured in Pixels Per Inch (or PPI). PPI simply means the amount of pixels that can be found on an inch (area) of a smartphone’s display. PPI can calculated using this formula PPI = √(screen width^2 + screen height^2)/screen size Example: The Xiaomi Mi A3 has a resolution of 1560 x 720p (HD) and a screen size of 6.09”. Using our formula: PPI = √(screen width^2 + screen height^2)/screen size PPI = √((720)^2 + (1560)^2)/6.09 {solve for the squares first} PPI = √(518,400+2,433,600)/6.09. {add up the numbers in the brackets} PPI = √(2,952,000)/6.09 {square the number in the bracket} PPI = 1718.13853/6.09 {divide it by the denominator} PPI = 282.12 What do the numbers mean? D class A pixel density of less than 300ppi can be said to be average. Colours may not be very accurate, detail may be lacking and image quality will definitely suffer. This is particularly seen when resolutions of 720p are used on screens larger than 6”. The pixels are spread too far apart. Examples of devices here include the aforementioned Mi A3 (282ppi), Samsung Galaxy A10 (271ppi), Samsung A20 (268ppi) and Samsung A21 (270ppi). Budget and entry level phones tend to have low PPIs. C class Between 300 and 400ppi is a good pixel density to have on a display. Colours are decently represented, details are good and image quality is very okay. Current midrange phones fall within this category because they mostly use 1080p resolutions which is okay for a 6” but you could also find older premium phones here. These include Redmi Note 9S/9 Pro (395ppi), Huawei Mate 30 (389ppi), Xiaomi MI 10 (386ppi), iPhone 11 (323.6ppi) etc. B class Pixel densities of 400 to 500ppi are quite impressive. It takes the viewing experience up a notch. Colours pop out, details are sharp and image quality is very good. Midrangers, flagship killers and older flaghips can be found here as well as some new flagship models. Example are Honor 10 lite (415ppi), Redmi Note 7 and Redmi Note 8 (409ppi), iPhone X (458ppi), iPhone 12 (460ppi) etc. A class Pixel densities above 500ppi are top of line. You get the best of everything here. Image quality is so good that they seen to jump out of your screen. Details are crisp and the colours are rich and vibrant. Only flagships get to enjoy this kinds of PPIs as the displays around here are mostly 1440p (QHD or 2K) and 2160p (UHD or 4K). Phones here include Samsung Galaxy S20 (563ppi), S20 Plus (525ppi), S20 Ultra (511ppi), Xiaomi MI 11 (515ppi) etc https://inquisitiveuniverse.com/2021/01/10/pixel-density-explained/ You can also find me on Telegram and Facebook by searching for Inquisitiveuniverse. The Telegram group is more interactive tho. 12 Likes 4 Shares
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Re: What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by Xfuzzy(m): 11:00am On Jan 11, 2021 |
Very educative.. Thanks Op. |
Re: What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by Adasun(m): 11:06am On Jan 11, 2021 |
I am trying to take attendance please. |
Re: What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by atheistandproud(m): 12:57pm On Jan 11, 2021 |
Xfuzzy: You're welcome. |
Re: What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by atheistandproud(m): 12:57pm On Jan 11, 2021 |
Adasun: Lol |
Re: What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by Rareoil(m): 4:31pm On Jan 11, 2021 |
Well done |
Re: What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by Rareoil(m): 4:42pm On Jan 11, 2021 |
I heard snapdragon 888 is having heating problems o. |
Re: What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by atheistandproud(m): 9:36am On Jan 12, 2021 |
Rareoil: Link please |
Re: What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by Hakeem12(m): 3:22pm On Jan 12, 2021 |
My neighbour keeps going on and on about his Amoled screen on his Samsung A20. He'd say "just use a phone with amoled, it is the best." Mah share this link give am. 1 Like 1 Share |
Re: What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by atheistandproud(m): 4:51pm On Jan 12, 2021 |
Hakeem12: Share away boss |
Re: What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by sunshineV(f): 5:19pm On Jan 12, 2021 |
Hakeem12:amoled on those cheap samsung are something else 1 Like |
Re: What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by atheistandproud(m): 5:30pm On Jan 12, 2021 |
sunshineV: Not all AMOLEDs are AMOLEDs. The "real" AMOLEDs by Samsung are super and dynamic AMOLEDs. The rest na scam. Samsung phones without those two are prolly using generic AMOLEDs. 1 Like |
Re: What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by Randerl: 6:15pm On Jan 12, 2021 |
@atheistandproud, you are really churning out useful stuff. Great work. 1 Like |
Re: What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by Youngpo413: 7:43pm On Jan 12, 2021 |
Hakeem12:na true na. |
Re: What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by Youngpo413: 7:47pm On Jan 12, 2021 |
atheistandproud:so tecno,gionee,umidigi own no follow? 1 Like |
Re: What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by atheistandproud(m): 9:34pm On Jan 12, 2021 |
Randerl: Thank you sir |
Re: What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by atheistandproud(m): 9:35pm On Jan 12, 2021 |
Youngpo413: Generic AMOLEDs |
Re: What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by Timmzycul11: 11:56pm On Jan 12, 2021 |
atheistandproud:Brokeness no good wallahi |
Re: What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by Youngpo413: 5:01am On Jan 13, 2021 |
atheistandproud:aka chinko AMOLEDs,lol,thanks for the info. |
Re: What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by atheistandproud(m): 12:00pm On Jan 13, 2021 |
Timmzycul11: Na wa my brother Youngpo413: Lol. |
Re: What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by fredie107(m): 8:36pm On Jan 13, 2021 |
So my Samsung A30 falls in this category B PPI. A very educative wrote up.... 1 Like |
Re: What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by jjxxx: 9:41pm On Jan 13, 2021 |
Great job from OP. 1 Like |
Re: What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by atheistandproud(m): 3:54pm On Jan 15, 2021 |
Re: What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by HassieMalcomson(f): 9:01pm On Nov 25, 2021 |
Thanks for sharing such an informative thread. I have been trying to understand PPI for many weeks. However, I have a few questions here. First of all, can we improve the PPI of any image that is already with the quality of poor pixels? If yes, then what tools you can suggest? Secondly, I want to know whether I can use this web application https://ruler.onl/ for graphic designing software to measure the PPI. Actually, I am not using premium graphical design software that is why I don't have functionalities to measure pixel per inch. I would be grateful if you share your thoughts on this matter. Thanks. |
Re: What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by ICEWIN: 9:31pm On Nov 25, 2021 |
atheistandproud: Lolzzz as far as am concern cheap Samsung with AMOLED is the same thing with eye Care mode. |
Re: What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by grudges: 10:45pm On Nov 25, 2021 |
Who else skip the step followed to arrive at the final result of the ppi, thump up bros, more ppi more clarity |
Re: What Is Pixel Density (PPI)? What It Means And How To Calculate For It. by grudges: 10:46pm On Nov 25, 2021 |
ICEWIN: |
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