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[Guide] [Step By Step Guide] MIUI Theme Creation for First Timers - Part 04 [I.P.S.]

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23:20, Jan-16-2015 | From PC
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Go to reply no.
This post was edited by I.P.S. at 23:12, Mar-03-2015

Hi MIUIers,

In this chpater, let's understand how Image Quality & Image Size can be contolled & monitored as per our requirements.

Images are made up of Pixels which is the smallest controllable element of a picture represented on the screen. Each pixel is a sample of an original image, more samples typically provide more accurate representations of the original. The intensity of each pixel is variable.  In color image systems, a color is typically represented by 3 or 4 component intensities such as Red, Green & Blue or Cyan, Magenta, Yellow & Black. The word PIXEL is based on a contraction of PIX (Pictures) & EL (Element).

Pixel density is responsible for Image Quality & Image Size.  Pixel density is measured in DPI, PPI & BPP. These terms are often mistakingly used interchangeably but they are a lot different.


DPI

DPI is abbreviated form of Dots Per Inch & is used to describe the resolution number of dots per inch in a digital print & the printing resolution of a hard copy print dot gain, which is the increase in the size of the halftone dots during printing. This is caused by spreading the ink on the surface of the media. In simple language its the physical dot density of an image when it is reproduced as a real physical entity.


PPI

PPI is abbreviated form of Pixels Per Inch & is a measure of Display Quality of a image. Its related to the size of the display in inches & the total number of pixels in the horizontal & vertical directions. This masurement is often mistakingly referred to as DPI though that measurement more accurately refers to Printer.


BPP

BPP is abbreviated form of Bits Per Pixel & is a measure of Display Quality of Distinct Colors in a image.  Following table shows various Bits & their Color :
BPP
No. of Colors
1
2
2
4
3
8
4
16
5
32
6
64
7
128
8
256
10
1024
16
65536
24
16777216 (16.7 million)
32
4294967296 (4294 Million)

Image Size

After the discussion of BPP, we have everything that is required to calculate Image Size as it depends upon 3 things :

No. of Rows,
No. of Columns, &
BPP.

To calculate image size once we have gathered the above information we have to apply these values in the following formulae :

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I.P.S. - A MIUI Lover Responsibly Helpful in Sharing Creatively.

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13:43, Jan-18-2015 | From PC
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Superb...  Very nice

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I.P.S. Thx for appreciation  14:01, Jan-18-2015
Narendra Kumar

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14:20, Jan-18-2015 | From PC
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Awesome Tutorials all of them. Keep it up bro...

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16:50, Jan-18-2015 | From PC
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Learnt a lot from your tutorials.

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18:17, Jan-18-2015 | From PC
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great efforts

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18:20, Jan-18-2015 | From PC
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Explained very well. Keep up the good job.

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18:58, Jan-18-2015 | From PC
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Good work buddy.

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12:11, Jan-21-2015 | From PC
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will study this

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19:52, Jan-21-2015 | From PC
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Awesome work

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00:35, Jan-31-2015 | From PC
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Fabulous description & awes0me guide

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