Alley in Pisa, Italy

by Lars Kotthoff

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746 reputation
45
bio website marksblog.com
location Minnesota
age
visits member for 3 years, 11 months
seen Feb 3 at 23:17
I've been a software developer for a lot longer than I'm willing to admit. My current interests are C++ and Python on Windows, but I've been known to dabble in Linux and I try to be language agnostic when I can.

Feb
14
answered Should I be shooting in RAW even though I'm a beginner that doesn't know how to retouch photos yet?
Feb
11
comment How is the YCbCr color space represented in a JPEG image?
Sorry, I didn't mean to imply that the subsampling causes the artifacts. It's just that the existing errors from quantization get blown up 2X, making them much more visible. I think it's important to know that the visible effect of subsampling is more than just a little added fuzziness.
Feb
8
comment How is the YCbCr color space represented in a JPEG image?
Chroma-subsampling doesn't just result in "loss of resolution". It introduces very noticeable artifacts especially in the red channel.
Feb
8
comment How is the YCbCr color space represented in a JPEG image?
@thomasrutter, Photoshop picks the subsampling based on the quality setting you choose. It's not an independent option.
Feb
3
comment Why has no one invented a 4:5 aspect ratio APS-C/35mm-sized DSLR?
@Matt, Canon is a special case because they make their own sensors and even the least popular ones sell in great volumes, just because they're Canon. The other sensor makers concentrate on the ones that are a sure thing.
Dec
10
comment How to start the basics of photography, which is the best entry level SLR camera?
+1 for Take lots of images and Experiment. That is surely the best way to make the most of your equipment.
Dec
7
answered How can I get dramatic shallow DOF with a kit lens?
Oct
23
answered For sports photography, should I use image stabilization or a faster lens?
Oct
18
comment Where can I find comparisons for linear polarizers (for a cheap variable ND filter)?
Do you have a link to Pentax's claims that a Linear Polarizer is OK?
Oct
9
comment What are my best options for a tripod for up to $100?
I'm sure he meant ruing as in rue the day.
Sep
22
comment How can I better organise and file my photos?
The best way is with the Delete button. Now if I could only follow my own advice...
Sep
21
answered How to tell if a polarizing filter is too damaged?
Sep
18
comment How do I correct white balance in JPEG images?
@Rowland, I should also mention that there are other methods in Paint Shop Pro that might be simpler, but I prefer this method as it gives the most flexibility. The Manual Color Correction feature is hidden in later versions, you need to customize the menu or toolbar to bring it back.
Sep
16
answered How do I correct white balance in JPEG images?
Aug
25
answered How to get this colorful look in a landscape photo?
Aug
24
answered Is this sensor ghosting, or something else?
Aug
23
awarded  Commentator
Aug
23
comment What file system are memory cards formatted with?
FAT16 had fewer patent issues so it was preferred for the smaller cards.
Aug
20
comment The right way to delete all photos from a camera
The camera manual will always recommend using the camera to format the card, as that's the only process they have any control over. Doesn't mean other methods aren't just as good.
Aug
20
comment Good examples of RAW's advantages over JPEG?
The conversion from RAW to JPEG not only reduces the number of bits but it changes from linear to logarithmic representation. Since our visual response in the eye is also logarithmic, you lose less from this process than the numbers suggest.