Show Ignored Content. Ask a Question Want to reply to this thread or ask your own question? You'll need to choose a username for the site, which only take a couple of moments here. After that, you can post your question and our members will help you out.
Ask a Question. Print DPI. Chopping a 3 Megapixel chunk out of an 8 Megapixel photo. Converting 72 dpi to dpi. Enhance scanned photographs: DPI?? Articles and Tutorials. Member-Submitted Articles. Recommended Gear. Firmware Update Guide. Firmware Updates. Pentax News. Pentax Lens Reviews. Third-Party Lens Reviews. Lens Compatibility. Pentax Serial Number Database. In-Depth Reviews. SLR Lens Forum. Sample Photo Archive. Pentax Camera Reviews. Check Shutter Count.
SLR Discussion Forums. Mirrorless Discussion Forums. Pentax KP. Pentax K-3 III. Pentax K New Posts. Today's Threads. Recent Updates. Unanswered Threads. Recently Liked Posts. Forum RSS Feed. Scanning film - dpi vs MP? Steve Last edited by stevebrot; at PM.
Originally posted by Spock This is comparable to my K10's image file sizes - but sadly not when it comes to sharpness and detail. This is where post scan sharpening comes in - there are many ways to do it, a lot of these are explained right here see the last couple of pages of 'post your medium format pictures' thread for example The trick is to 'develop' the local contrast without introducing too many artifacts; this is possible and usually necessary.
Originally posted by Nesster I'm actually a bit jealous that you get a benefit of dpi ?! For what it's worth my scanner claims dpi through the software and xdpi optical but seeing as anything above dpi does nothing other than increase file size, I'd say it was only a marketing exercise by Canon.
Originally posted by goddo31 Spock, You have received some great advice from the guys here, it lines up with my experience in scanning so far after probably 8 months of doing it and about images I can see how careful sharpening could improve image quality of scans.
I will definitely endeavour to learn and hone my image sharpening skills Originally posted by stevebrot What does this mean in practical terms? Yes, I can see that real dpi is about the best it can do. However, in that link they said: Quote: In order to achieve an effective value of ppi, the pattern should be scanned with ppi.
Having tried scanning at various resolutions I am inclined to think that dpi doesn't give any worthwhile advantage over dpi - at least for for a Kodak Ektachrome slide anyway iso I think. Originally posted by Spock scans above dpi apear to be pointless.
Just how much are you blowing the image up, and what format are you saving in? I want this information to know what scanners I need to look at or at least to have the ability to determine if a scanning service will suffice my needs. In terms of buying scanners, the DPI that manufacturers provide can be a bit misleading, and the actual image resolution you can get from the scanners is quite a bit lower. The common wisdom is that most consumer flatbed scanners top out at an effective resolution somewhere around dpi, despite reporting numbers as high as "x" like my Epson Dedicated negative scanners come much closer to their reported dpi, though still generally don't quite make it.
But even that isn't quite the whole story: scanning at the higher settings may not get you an improvement in pure resolution, but if you reduce the image to something closer to the 'true' resolution , you effectively get a super-sampled scan, and can see improvements in noise.
Maybe to sum up: a flatbed scanner will get you a quality print from a 35mm negative up to about 8x10, and a "pretty good" print might stretch up to about 16x And don't forget the influence of the printer You can actually do this calculation in Photoshop. Be careful, make sure they are not resampling the image to get to the size you want. Sign up to join this community. The best answers are voted up and rise to the top.
Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? The results are not at all the same as scanning at the higher resolution. Alright, again, if you haven't watched the special video above, I would highly recommend you watch it. Most of the information you need to know is in this easy to follow mini-lesson. After watching the video and reading this article, has this made you change your mind one way or the other?
Tell me what you think about all of this in the comment section below. I'd love to hear your thoughts. Last updated Nov 1, Scanning Photos. Last updated Jul 18, Scanning Photos. So I changed strategies and aimed for the stars. The result? Read on to find out. And hopefully, by sharing my scanning journey, it will help you on your scanning journey. Last updated Sep 22, Scanning Photos. For anyone with children, or with other family members such as nieces or nephews, the answer to whether or not we should scan our old family prints, slides and negatives may seem quite obvious.
Maybe even for some of you who actually do have family to pass your scanned collections on to! Need Help With Your Photos? Connect With Me Follows. Related Posts. Leave a Comment Below. Subscribe by email to new comments without commenting.
0コメント