Digital Images and Resolution

BP
Posted By
Brandon_Pines
Jun 23, 2004
Views
272
Replies
11
Status
Closed
Can anyone tell me how I can change the way Photoshop views my high quality digital pictures?

They come in at 72 DPI even though they are high quality pictures. I think it is the settings that photoshop uses to view on a monitor.

I would like ot view the true resolution of my digital files (Image> Image Size)

thank you

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Ol__Whozit
Jun 23, 2004
Image>Image size, set the resolution to whatever you want. When you open a new image (File>New) you can set the resolution to whatever you want. If you close the program, when you next open it, it will retain those settings.
QP
Q_Photo
Jun 23, 2004
I don’t think that Photoshop changes the resolution of files unless you tell it to do so. If they are opening at 72 ppi then they must be at 72 ppi. Are these photos from a digital camera? If so they probably are at 72. Don’t confuse "hi quality" with "hi resolution" With cameras "Quality" often refers to amount and type of compression. Resolution is always resolution.
M
marionbabich
Jun 23, 2004
My sony f828(8mp)opens in PSCS at 72 dpi, BUT, the file is also 45×34.

Nice sharp crisp files.
Marion
JB
Jonathan_Balza
Jun 23, 2004
When you do what Ol’Whozit said, don’t forget to uncheck "Resample Image" in the Image Size dialog box!
JH
Jim_Hess
Jun 23, 2004
Most digital cameras record the images at 72 PPI. You cannot change that, and Photoshop is reporting that correctly. The way you increase the "quality" of your picture is to resize it with resampling turned off. If you change the dimensions of your picture, making it smaller, the PPI count will increase automatically. Then, if your image still isn’t as high resolution as you want you can use the new resampling options in Photoshop CS to increase the PPI even more. That bicubic smoother and bicubic sharper resample options in Photoshop CS are significant improvements. The main factor that determines the quality of your image is the total number of pixels.
BP
Brandon_Pines
Jun 29, 2004
So all I need to do is to go to Image > Image Size and Change it from 72 PPI to 300 PPI with resample off (for press quality)? I know that by doing that the picture size will shrink also (which is good, because I would be shrinking it in my page layout prog anyway.
Here is my only other question then: if the Digital Picture is in JPEG format and I open it, change it from 72 to 300 dpi, and save it as a TIF, would the picture contain lossy compression from the original JPEG format, or would it be Non lossy from the Tif format I saved it as?
RW
Rene_Walling
Jun 29, 2004
What ever information was lost in the original JPEG encoding will remain lost, but no new information losses will happen as long as you do not reencode the image wiht a lossy compression scheme.
BP
Brandon_Pines
Jun 29, 2004
so no matter what, if you take a picture with a digital camera you will always experience picture loss due to its compression methods?
RW
Rene_Walling
Jun 29, 2004
No,

That’s what the RAW format is for.

Also some cameras allow you to save TIFF files.

Besides, saving once as a JPEG is usually OK, it’s resaving over and over again that destroys your image.
BP
Brandon_Pines
Jun 29, 2004
could you explain the RAW format, i am unfamiliar with that
RW
Rene_Walling
Jun 29, 2004
Try this links and your camera’s manual:

<http://www.creativepro.com/story/review/19008.html>

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