Digital Camera Resolution

from WinCustomize Forums
Does anyone know of a digital camera that captures images in anything higher than 72 dpi? All high megapixel does is make the picture size bigger, but not the resolution. Standard print dpi is 300. Any ideas?
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Reply #1 from WinCustomize Forums Top
Digital Rebel by Canon is your best bang for the buck. Was for me anyway
Reply #2 from WinCustomize Forums Top
screen resolution on a lcd is usually 72dpi (macs) to 94dpi (windows)

print resolution, for best quality, is usually 300 dpi

for your camera, the higher the megapixels, the more 'info' it's cramming into the same space..higher resolution doesn't make the picture bigger in physical dimensions....take two camera, one at 2MP, one at 6MP..they take the same shot of a tree...the image taken with the 2MP camera is not as high quality, 'cos the 6MP picture of the tree has alot more pixels in it....but digi cameras do not take 72dpi or 300 dpi photos

this of course is not the whole picture (ha ha)...different camera get to their highest pixel count in different way..

here's a MP vs. resolution table :

Megapixels vs. Resolution and Print Sizes
Megapixels - Resolution - Print 300PPI - Print 150PPI
1.2 - 1280x960 - 4.3x3.2" (10.8x8.1 cm) - 8.7x6.4" (21.6x16.2 cm)
2 - 1600x1200 - 5.3x4" (13.6x10.2 cm) - 10.6x8" (27.2x20.4 cm)
3 - 2048x1536 - 6.8x5.1" (17.3x13 cm) - 13.6x10.2" (34.6x26 cm)
4 - 2272x1704 - 7.6x5.7" (19.2x 14.4 cm) - 15.2x11.4" (38.4x28.8 cm)
5 - 2592x1944 - 8.6x6.5" (22x16.5 cm) - 17.2x13" (44x33 cm)


here's a great Link



i hope this helps
Offworld Trading Company
Reply #3 from WinCustomize Forums Top
for your camera, the higher the megapixels, the more 'info' it's cramming into the same space..higher resolution doesn't make the picture bigger in physical dimensions


It seems like it does though.

If it crams more info into the same space, it would seem to me that it would be at higher resolution. Basically, if I were to bring in a photo into Photoshop, they're all at 72dpi, and I can't seem to control that. Having an image thats 25 inches but 72 dpi doesn't do me much good. I don't need to print posters, but I would like to have high res pictures.
Reply #4 from WinCustomize Forums Top
I have used InfraView to change all sorts of resolutions and DPIs.

Link

Maybe it'll help do what you need.

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Reply #5 from WinCustomize Forums Top
I have no problem changing from low to high res, or high to low. I have Photoshop. I just want to be able to take a digital photo in 300 dpi at a small phyical size like 6x8 or something.

Changing from 72 to 300 dpi isn't the same as capturing the image at 300. If you scan an image in at 300, it looks a lot better than scanning it in at 72 and upping it to 300.
Reply #6 from WinCustomize Forums Top
If I don't know what I'm talking about someone tell me to shut up. But I think it works like this...

higher megapixel shots become higher resolution on your screen. The camera crams more info into the same size pic, but when that translates to your monitor, it just seems to make the picture larger. That's because your monitors res is not going to change on the fly depending on what picture you're viewing. So, taking a picture, then upping the resolution once it's on your computer is fine. It's just as if you'd taken it at that resolution. It will seem to you that it only made your picture smaller, but it actually just made it higher res. Make sense? Didn't think so. It made sense in my head, though....
Reply #7 from WinCustomize Forums Top
http://desktoppub.about.com/library/glossary/bldef-ppi.htm
Heres a page that will help.

From what I'm reading there is a bit of confusion about dpi and ppi. First of all photoshop defaults screen resolution output at 72 ppi(Pixels per inch) and print output at 300 ppi. herein lays the confusion. Most all your laser printers output in dpi.(dots per inch). Screen resolution and print output are two separate worlds.
To print a high quality photos no matter what you software outputs, you still need a high Pixel count from your camera. A low pixel count is not going to print good quality no matter what you set either the dpi or ppi settings in photoshop. A 2.1 megapixel will give you a good quality small photo but as you expand, the size the pixels spread and the quality goes down. so in a nutshell, if you what hi quality photos large or small , you need a camera that will give you the highest pixel count. With all that said it's still good to save all your work in the highest ppi setting, I do. For a good all around simple camera You will probably need to spend 500 to 1000. Pros will spend more. I have a Canon, its good.
Heres another ditty I found.
1) In computers, dots per inch (dpi) is a measure of the sharpness (that is, the density of illuminated points) on a display screen. The dot pitch determines the absolute limit of the possible dots per inch. However, the displayed resolution of pixels (picture elements) that is set up for the display is usually not as fine as the dot pitch. The dots per inch for a given picture resolution will differ based on the overall screen size since the same number of pixels are being spread out over a different space. Some users prefer the term "pixels per inch (ppi)" as a measure of display image sharpness, reserving dpi for use with the print medium.

2) In printing, dots per inch (dpi) is the usual measure of printed image quality on the paper. The average personal computer printer today provides 300 dpi or 600 dpi. Choosing the higher print quality usually reduces the speed of printing each page.
hope this helps....
Reply #8 from WinCustomize Forums Top

I use a Nikon D-70, that's 6.1Mp or 2000x3008 pixels.

Here's a pic reduced in size:

And here's a crop at the original size:

More than enough resolution to print A3

Reply #9 from WinCustomize Forums Top

If I don't know what I'm talking about someone tell me to shut up. But I think it works like this...

Nah...you got it right...

Reply #10 from WinCustomize Forums Top
Thanks all. I think I get it now.