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300dpi Camera?

Started Mar 8, 2005 | Discussions thread
Medic Laviña Senior Member • Posts: 1,287
Re: BTW, do not confuse DPI with PPI...

imbsysop wrote:

Medic Laviña wrote:

DPI is equivalent to PPI only when printing in B&W. But when
printing in color, DPI should be 4x the PPI density if every pixel
is to be resolved. This is because a color printer basically mixes
4 dots of different ink colors (including black) per pixel.

sorry but that is absolutely NOT correct ..

PPI and DPI have nothing! to do with each other ...
ad nauseam .. PPI is an arbitrary pixel density set by the user to
define the maximum printsize he/she will get on the paper ..
(example 3072x2304 aka 7Mpx picture at 300PPI -> 3072/300=10.24

Correct. But PPI is not equivalent to DPI as you described on your previous post.

inch largest length for printing, same for other dimension, notice
it has nothing to do with DPI! on the printer!)

Now you're contradicting yourself.

DPI is just the dot density that the printer is able to produce ..
modern printer have 2400, 4800 or even beyond that DPI .. (LPI
printers is another story ..)

The 4x factor you are giving is not very relevant because a)
several printers mix more than 3colors+black and it all depends on

That's not the point. I was just describing the difference between DPI and PPI, which you described on your previous post as the same thing. Let me quote what you've said:

"The dpi is a user applied & choosen pixel density for printing AND the exact connotation is PPI (pixels per inch). The DPI definition is purely printer based aka a 300PPI choice to define print size..."

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Medic

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