Monthly Archives: January 2011

Before moving on to optimum resampling strategies in practice, which is where I’m going with this Epson printer testing, I thought I’d take a look at what happens with the 3880 at 1440/720 dpi resolution. I used ABW mode, and … Continue reading →

I thought I’d look at the way the Epson 3880 and the driver resample images at 2880/1440 dpi. I took the now-familiar grating at 700 ppi, and resampled it in Photoshop using nearest neighbor. This is what I got: Then … Continue reading →

I thought I’d compare the Epson driver’s color mode to the Advanced B&W (ABW) mode that I used in yesterday’s post. Here is the test grating at 360 ppi, printed at 2880/1440 dpi: Except for some color shifts that vary with gray … Continue reading →

If you’ve read the last four or five posts, it’s probably occurred to you that, in the new high resolution digital image, focusing is a challenge. Indeed; if you want to take full advantage of all the pixels that modern … Continue reading →

I got some perceptive comments about the resampling post, all from the same person. Here’s the first: For starters, two-thirds (not half) of the information in any color image from a Bayer-pattern sensor is fabricated.  Half of the green and … Continue reading →

Resampling has a bad name among many photographers. Here’s a typical pronouncement,  from here: “I am not going to address resampling here because it degrades an image and has little application in fine art photography. (Resampling is when Photoshop adds … Continue reading →

Let’s review conventional sampling theory. We start with a continuous representation (the real world, as imaged by the lens), filter that to remove spectral components above half the sampling frequency, sample at evenly spaced infinitesimal points, digitize the results, and … Continue reading →