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How to calculate print sizes |O|

By Gregor Klevže
3,424 views 7 replies
sed avatar
sed
Member
OP
I just recieveved a Print catalog that asks for 350 pix.... Is that too tight?? 😎
Anonymous avatar
Anonymous
Member
It depends on the final size, Sed... |O|
Anonymous avatar
Anonymous
Member
I have a 8.1 megapixel but as you know my friend, the image sensor is in question. I will eventually have a large print made to hang on my wall. I have not decided which one. :D |O| This is very useful information, the formulas that you provided have educated me... thanks!
Anonymous avatar
Anonymous
Member
My only question is what do the photo guys that do the prints do my default. I would bring my card, order by touchscreen, wait an hour and get the prints. The DPI thing - I have to say - I was totally ignorant to.
Anonymous avatar
Anonymous
Member
that is "by default" not "my default" my typing continues to stink!! 😮
alfa30 avatar
alfa30
Member
Interesting! <br />Thanks Artur... 😁
Anonymous avatar
Anonymous
Member
Fred, be advised that DPI is different than PPI.Even though &quot;dots per inch&quot; (dpi) and &quot;pixels per inch&quot; (ppi) are used interchangeably by many, they are not the same thing. Traditional printing methods use patterns of dots to render photographic images on a printed page. While pixels on a monitor are square and in contact with the adjacent pixels, printed dots have space between them to make white, or no space between them to make black. Color photographs are printed using four inks, Cyan, Magenta, Yellow, and Black (CMYK), and four separate dot patterns, one for each ink. Dots per inch (dpi) refers to printed dots and the space between them, while pixels per inch (ppi) refers to the square pixels in a digital image. Keep in mind that many companies will ask for images at 300dpi when they really mean 300ppi. A digital image is what it is. It is however many pixels wide by however many pixels tall. If you divide each dimension by 300, you will have the size of the image at 300ppi. Now think about 300 pixels in an inch of space. Each pixel could be black, white, or any other color, but they are all next to each other with no spaces between them. When a digital image is prepared for reproduction on a printing press, pixels are converted to dots. Dots have spaces between them. 300 pixels become 150 dots and spaces, so 300ppi becomes roughly 150dpi. 150dpi is the accepted standard for printing photographic quality images.Printers usually refer to the number of rows or lines per inch (LPI). 150 lines per inch is simply 150 rows of 150 dots per inch. 150 LPI and 133 LPI have long been the established standards for the best quality reproduction of photographs in books and magazines. Newspapers traditionally use 85 LPI for photographs and detail is lost because the dots are plainly visible.Source: studio toolbox |O|
Anonymous avatar
Anonymous
Member
Thanks... :-)
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