In response to changes in computer technology, I’ve done a complete rewrite of the page on this site called “Backing up Photographic Images”. Over the next few days, I’ll be posting it here. Here’s the preface: In chemical photography, you have only one master image of each exposure. It’s stored on the film you put… [Read More]
Archives for September 2012
Downsampling with Lightroom
These days I’m as likely to reduce resolution when printing as I am to increase it. The slit scan files come out of the camera at up to 9000×64000 pixels. The sweep panos are typically 8000×24000. Even if you’re not using such extreme file sizes, you may be downsampling too. If you’ve got a D800… [Read More]
Printer resampling testing with no printer
I’ve been doing all my printer resampling testing by scanning actual printed output. I think that makes sense when you trying to evaluate the complete system. It allows you to see how the resampling interacts with the printer itself, and also allows you to see what differences in resampling more important for actual printing. However,… [Read More]
More Lightroom 4 print resampling
Today I’m posting a set of images similar to yesterday’s, but with a different resampling ratio. In today’s test images, the resolution of the target before resampling was 145 pixels per inch. As before, the test image was resampled to 360 pixels per inch before printing. The first image is from Lightroom 4 with no… [Read More]
Lightroom 4 printer resampling
A while back I did a series on resampling for printing. I found that Lightroom 3 did a bad job of it when compared to QImage, Perfect Resize, or even Photoshop’s bicubic interpolation. You can see that post here. During a workshop last spring, Eric Chan said that Lightroom 4 had improved. I’ve finally gotten around to… [Read More]