digitale foto's afdrukken: ervaringen.

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Op donderdag 2 juni 2005 14:26 schreef Five_Horizons het volgende:

Het feit dat jouw camera er 75 dpi plaatjes uitgooit wil zeggen dat het een slechte camera is.

Ik zou nog wel iets aan je instellingen veranderen van je camera. Van 75 dpi naar 150, daar wordt je foto i.i.g. niet beter van.

Voor drukwerk wordt uitgegaan van 300 dpi.

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Display, Printing, DPI and PPI
There's lots of confusion here so I'll try to go slowly!

When you display a digital image on a monitor, the only thing that determines the size of the image is the pixel count and aspect ratio. DPI and PPI (and I'll explain them later) mean absolutely nothing. If your image is a 480Kbyte file which is 800 pixels wide by 600 pixels wide, it will display as a full screen image if you are using an 800x600 display. It doesn't matter if your DPI is set to 1 or 1000 or if your PPI is set to 1 or 1000. This is 100% true as far as web display goes and as far as any monitor display goes - unless some software intervenes. For example the IE6 browser will take large images and resize them so they fit on the screen. However DPI and PPI are still ignored. A few advanced page layout programs and advanced image editors may be capable of taking DPI and PPI into account when displaying images.

So I'll say this once again. The way you control how large an image appears on someone's monitor screen when viewing your images on the web is by changing the pixel count. If your original image is 1600x1200 pixels it will probably be too large to see all at once on 95% of the video monitors out there. It will also be slow to load since it will be a large file. If you want someone using an 800x600 display to be able to see your image clearly, you need to change the size to, say, 600x400 pixels (remember the browser window is smaller than the full monitor display). You change image size in software. All image editing programs can do this. Sometimes it's called "downsampling" or "downsizing". See your image processing software manual for details on what options your software offers.

PPI stands for "Pixels per inch" and is almost exclusively used for printing, not video display. If you take an image that is 800 pixels wide and 600 pixels high, and you print it with a PPI setting of 100 pixels per inch, the print will be 8 inches wide by 6 inches high. If you print at 200 PPI you get a print 4" wide by 3" high. Now the print at 200 PPI will be higher in quality but smaller. Most people seem to agree that around 320 PPI is the highest number you really need. Above that it's very hard to see any improvement in image quality. 240 PPI is often used and even that is often regarded as high quality. Most people notice a quality drop when they go below 180 PPI.

DPI stands for "dots per inch" and is a property of a printer, not a digital image. It's a measure of how finely spaced the droplets of ink can be in a print. However the number is a bit misleading since it's not always measured in the way you think it might be! Printer settings of 360dpi, 720dpi, 1440dpi and 2880dpi are often found. However the difference between then is subtle at best. Most people probably couldn't tell the difference and 360dpi usually looks great. Changing DPI does not change the size of the print. PPI controls that. DPI controls print quality (though as I said, over 360dpi you don't see much change).

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Op donderdag 22 september 2005 15:05 schreef SEMTEX het volgende:
De Canon Pixma IP3000. 109 euro en je hebt nooit meer een online afdrukservice nodig

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Op donderdag 22 september 2005 15:09 schreef skiczukie het volgende:

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En hoe fukking duur zijn de cartridges?

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Op donderdag 22 september 2005 15:13 schreef SEMTEX het volgende:

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Canon valt wel mee, geloof ik. Ik had hiervoor een Lexmark te leen en die had pas dure cartridges

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Op donderdag 22 september 2005 15:05 schreef SEMTEX het volgende:
De Canon Pixma IP3000. 109 euro en je hebt nooit meer een online afdrukservice nodig