how main pixels = inches?

Question

How many pixels equal 3.5 x 5 inches?

Answer 1

assume we are talking about computer monitors which have 72 pixels /inch.
then you multiply the inches by 72 and multiply the products:
252 x 360=90720 pixels

Answer 2

according to what it said in wikipedia below, I'd estimate that 3.5x5 inches would be 325x451
I hope that helps!

For example, a display that is 11 inches wide by 8.5 inches high, capable of a maximum 1024 by 768 pixel resolution, can display about 93 PPI in both the horizontal and vertical directions. This figure is determined by dividing width (or height) of the display area in pixels, by width (or height) of the display area in inches. It is possible for a display's horizontal and vertical PPI measurements to be different. The apparent PPI of a monitor depends upon the screen resolution (that is, number of pixels) and the size of the screen in use; a monitor in 800 by 600 mode has a lower PPI than the same monitor at 1024 by 768 mode. The dot pitch of a computer display determines the absolute limit of possible pixel density.

Answer 3

This Site Might Help You.

RE:
how main pixels = inches?
How many pixels equal 3.5 x 5 inches?

Answer 4

Pixels, in the computer world, are the smallest addressable unites on the computer screen. This differs from monitor to monitor and also depends on the resolution of the screen. Therefore, you can NOT calculate a length in inches given pixels on the monitor. When you hear someone say "Yeah, I've got a 21 inches monitor", that means the monitor's width is 21 inches and that does NOT explicitly specify the monitor's maximum supported resolution.

Good luck.

Answer 5

"Is a mobile device having 300 pixel per inch is equal to a printed photo having 300 dots per inch?" No. The first answer is perfectly correct, but the real answer is simpler. If you are talking about printing a picture at 300 dpi at the same size as the mobile device display which shows 300 dpi then (subject to that first answer) they might look the same BUT it almost never true that printing is done at the size of the mobile display. So My older cheap cell phone with a camera takes images that are 640 x 480 - displayed on my desktop monitor (1024x768) these take up about half the screen and those in bright light are "good enough" as snap shots although not nearly what I consider good from my camera. Printed at 300 dpi they would be about 2 1/8" wide. My computer software treats them as if they were 72 dpi and spreads them from edge to edge on the paper at "100%" or over 8.8" wide where they would look worse than on the screen. So a lot of cheating/modification goes on.

Answer 6

3.5 Inches To Pixels

Answer 7

Hai deathuse...,

Pixel is short form of Picture Element.

A pixel is a single point, i. e. a dot, in a graphic image.

In graphic monitors, the number of pixels on the entire screen is called the resolution.

So, the number of pixels in a given area depends on the resolution of the screen as well as the size of the screen.

Dots per inch is determined by both the physical screen size and the resolution setting. A given image will have lower resolution - fewer dots per inch - on a larger screen as the same data is spread out over a larger physical area. On the same size screen, the image will have lower resolution if the resolution setting is made lower - resetting from 800 by 600 pixels per horizontal and vertical line to 640 by 480 means fewer dots per inch on the screen and an image that is less sharp.

For example, a 640-by-480 pixel screen is capable of displaying 640 distinct dots on each of 480 lines, or 307,200 pixels(obtained by multiplying 640X480). This translates into different dpi measurements depending on the size of the screen. For example, a 15-inch VGA monitor (640x480) displays about 50 dots per inch.

So, in order to find the number of pixels in 3.5 x 5 sq. inches, you should know both the resolution of the display as well as the size of the screen.

Let, the resolution of the display be "x-by-y".
Let, the area of the screen be A ...(in sq. inch).
The given area, A1 = 3.5 X 5 = 17.5 sq. in.

Your required answer, no. of pixels in 3.5 x 5 sq. inches = [(x)*(y)/A]*[17.5]


For more info, visit:
http://www.webopedia.com/TERM/p/pixel.html
http://www.webopedia.com/TERM/R/resolution.html
http://searchsmb.techtarget.com/sDefinition/0,,sid44_gci212793,00.html

Answer 8

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pixels per inch are well defined. For a display, usually that means 3 elements per pixel, one for each of the 3 colors. Dots per inch are pretty vague, specially for printers and cameras. Printers promise numbers like 1200 dots per inch, but how a "dot" is defined in a pretty vague way. Of course the manufacturer's marketing department adjusts the numbers to make the printer look more favorable. I also know that cameras play games with the numbers also. for example, a 9 M pixel camera actually has 3 M of each of the 3 main colors, so this would really rate as a 3 M pixel for a display. Bottom line, the numbers don't mean much. You have to look at comparative reviews in places like Consumer Reports. wikipedis: DPI measurement in printing DPI is used to describe the resolution number of dots per inch in a digital print and the printing resolution of a hard copy print dot gain; the increase in the size of the halftone dots during printing. This is caused by the spreading of ink on the surface of the media. Up to a point, printers with higher DPI produce clearer and more detailed output. A printer does not necessarily have a single DPI measurement; it is dependent on print mode, which is usually influenced by driver settings. The range of DPI supported by a printer is most dependent on the print head technology it uses. A dot matrix printer, for example, applies ink via tiny rods striking an ink ribbon, and has a relatively low resolution, typically in the range of 60 to 90 DPI. An inkjet printer sprays ink through tiny nozzles, and is typically capable of 300-600 DPI. A laser printer applies toner through a controlled electrostatic charge, and may be in the range of 600 to 1,800 DPI. The DPI measurement of a printer often needs to be considerably higher than the pixels per inch (PPI) measurement of a video display in order to produce similar-quality output. This is due to the limited range of colours for each dot typically available on a printer. At each dot position, the simplest type of colour printer can print no dot, or a dot consisting of a fixed volume of ink in each of four colour channels (typically CMYK with cyan, magenta, yellow and black ink) or 24 = 16 colours on laser, wax and most inkjet printers, higher end inkjet printers can offer 5, 6 or 7 ink colours giving 32, 64 or 128 tones available per dot location. Contrast this to a standard sRGB monitor where each pixel produces 256 intensities of light in each of three channels (RGB) to additively create 2563 = 16,777,216 colours. The number of unique colours for a printed CMYK dot from this simplest type of inkjet printer is only 8 since no coloured ink is visible when printed on black and black is used instead of CMY

Answer 9

3.56