What the heck is this called? - DPChallenge Forums

Mattel Barbie Photo Designer Digital Camera

12/28/2005 10:13:35 AM · #1

Once in awhile I'm seeing these vertical lines show up in images - straight out of the camera. Can anyone tell me what this is called (besides screwed up!)?

above crop taken from the original of this image...

Thanks - feedback much appreciated.
Barry

nsbca7

12/28/2005 10:16:31 AM · #2

Looks like duks to me.

Konador

Canon EOS-500D Rebel T1i

Canon EF-S 18-55mm f/3.5-5.6 IS

12/28/2005 10:17:18 AM · #3

I don't see anything...? Can you point out where they are?

Ombra_foto

Olympus E-300 EVOLT

Olympus 40-150mm f/3.5-4.5 Zuiko Digital

12/28/2005 10:18:38 AM · #4

I see nothing either..

gaurawa

Canon EOS-5D Mark II

Canon EF 24-105mm f/4.0L IS

12/28/2005 10:19:02 AM · #5

I don't see any pronounced lines either. Are you referring to the vertical lines on the edges ( top right side ) ?

nsbca7

Mattel Barbie Photo Designer Digital Camera

12/28/2005 10:19:39 AM · #6

Check your monitor.

Olympus 12-45mm f/4.0 Pro

12/28/2005 10:20:17 AM · #7

Ok...so maybe I should have used a different (non-humorous) example? ;^)

Seriously - is there a term for the vertical lines showing up in the close-up crop? The camera had been on for several hours at the point this image was taken. Is it heat related? Is the camera malfunctioning? I'm not seeing this all the time (but then I don't always view all images at 100% either).

Originally posted by nsbca7:

Looks like duks to me.

OdysseyF22

Panasonic DC-G9

12/28/2005 10:20:51 AM · #8

I'm not seeing any lines...sorry mate.

Canon EF 28-135mm f/3.5-5.6 IS USM

12/28/2005 10:21:58 AM · #9

Yes - Around the eye and beak area in the top right area of the crop posted.

Originally posted by gaurawa:

I don't see any pronounced lines either. Are you referring to the vertical lines on the edges ( top right side ) ?

edit to add - These same vertical lines are visible in other areas of the image when viewed at 100%. Not just this one area pointed out in the crop posted.

Message edited by author 2005-12-28 10:23:06.

Man_Called_Horse

Canon EOS-300D Rebel

12/28/2005 10:23:43 AM · #10

can you screen capture (control/prt scr) put into PS with a new file, use a pencil or paint brush, and point out what you are seeing?

Message edited by author 2005-12-28 10:24:18.

psychephylax

Canon EOS-5D Mark III

12/28/2005 10:28:50 AM · #11

Could it be JPG artifacts? What settings do you shoot the photos as? Like, I think Nikons have Super-Fine, Fine...etc settings. If it's not set on highest you may get artifacts like this? (Just a guess though)

scalvert

Canon EOS-5D Mark III

Canon EF 24-105mm f/4.0L IS

12/28/2005 10:33:34 AM · #12

Looks like JPEG artifacts to me. I don't see them at all on the cropped image as posted, but at 200% in Photoshop I see vertical lines exactly where I'd expect them on a JPEG.

gaurawa

Canon EOS-5D Mark II

Canon EF 24-105mm f/4.0L IS

12/28/2005 10:35:10 AM · #13

Yup jpeg problems. I think they will appear at every sharp edge which is at an anlge ( non vertical and non horizontal )

Canon EF 70-200mm f/2.8L IS USM

12/28/2005 10:43:04 AM · #14

Highlighted in another crop.

Maybe it is just artifacts...strange that I don't see them that often. I'll have to go back thru and look at some others at 100%. This shot had been kicked back from a micro-stock site for 'Noise, artifacts or hazing at full size', along with some others submitted at the same time.

Camera settings for this shot (always set to highest 'Fine' level) which is 2272 x 1704. Shutter speed 1/100, ISO 50, F4.5. It was at the top end of my zoom (420mm - 35mm equiv).

Thanks very much for the feedback everyone.

Man_Called_Horse

Canon EOS-300D Rebel

12/28/2005 10:48:23 AM · #15

Yeah, definetly artifacts.

Can you shoot RAW? This should take care of the artifacts.

theSaj

Canon EOS-20D

12/28/2005 10:52:32 AM · #16

And remember boys and girls, artifacts are only valuable if they're ancient. And thus, digital artifacts are of little to no value.

;)

First of, use the image in the highest quality you have available when re-sizing. I know some people save the image first in a reduced JPG and then re-size. This results in lower quality than re-sizing the image before saving and then saving the resized image in the desired quality. Thus equating to one conversion, not two.

- Saj

DjFenzl

12/28/2005 10:54:26 AM · #17

you won't see jpg artifacting all the time because it does not apply it's compression evenly across the pictures. It really depends on the contrast of the picture and the amount of different colors in the picture.

12/28/2005 11:01:22 AM · #18

Originally posted by American_Horse:

... Can you shoot RAW? This should take care of the artifacts.

Not yet...soon I hope! ;^)

Originally posted by theSaj:

... First of, use the image in the highest quality you have available when re-sizing. I know some people save the image first in a reduced JPG and then re-size. This results in lower quality than re-sizing the image before saving and then saving the resized image in the desired quality. Thus equating to one conversion, not two.

- Saj

Good advice. In the example I presented the artifacts were showing in the original 'out of the camera' jpg file.