Edge Line Artifact on Output

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klaxian
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Edge Line Artifact on Output

Post by klaxian »

I'm noticing a strange artifact when exporting certain files. There is a vertical line of a few pixels on the left edge that doesn't match the rest of the photo. This is not present in the RAW original, but exported JPGs and TIFFs show the problem. Only certain images actually produce this artifact, but it is consistent for the ones that do. You can see an example below. Look closely. Viewing on a black background makes it more apparent.

Any idea how to fix or prevent this? It's more pronounced when viewing the images at a larger size or printing. Thanks.

Image
klaxian
Posts: 38
Joined: Sun Jan 22, 2012 11:20 pm
operating_system: Linux
System_Drive: N/A
32bit or 64bit: 64 Bit
motherboard: ASUS P67 Revolution
processor: Intel 3770k 4.6GHz
ram: 16GB
Video Card: Nvidia GTX 480 SLI
Hard_Drive_Capacity: 240GB SSD
Monitor/Display Make & Model: 3 x ASUS ML248H
Location: New York

Re: Edge Line Artifact on Output

Post by klaxian »

Cropping the image away from the left side before exporting seems to prevent the issue, but that shouldn't be necessary.
klaxian
Posts: 38
Joined: Sun Jan 22, 2012 11:20 pm
operating_system: Linux
System_Drive: N/A
32bit or 64bit: 64 Bit
motherboard: ASUS P67 Revolution
processor: Intel 3770k 4.6GHz
ram: 16GB
Video Card: Nvidia GTX 480 SLI
Hard_Drive_Capacity: 240GB SSD
Monitor/Display Make & Model: 3 x ASUS ML248H
Location: New York

Re: Edge Line Artifact on Output

Post by klaxian »

I have attached a version on a black background that makes it easier to see. Click to see a larger version.
Edge Line Artifact Black BG.jpg
klaxian
Posts: 38
Joined: Sun Jan 22, 2012 11:20 pm
operating_system: Linux
System_Drive: N/A
32bit or 64bit: 64 Bit
motherboard: ASUS P67 Revolution
processor: Intel 3770k 4.6GHz
ram: 16GB
Video Card: Nvidia GTX 480 SLI
Hard_Drive_Capacity: 240GB SSD
Monitor/Display Make & Model: 3 x ASUS ML248H
Location: New York

Re: Edge Line Artifact on Output

Post by klaxian »

Whoops. I guess this has been a known bug for a long time :(
http://forum.corel.com/EN/viewtopic.php ... 17&start=0
grubernd
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Re: Edge Line Artifact on Output

Post by grubernd »

there are two incarnations of this bug: one with NoiseNinja and one with CA correction. *sigh*
Bibble since 2004. Aftershot until 2020. From then on darktable.
klaxian
Posts: 38
Joined: Sun Jan 22, 2012 11:20 pm
operating_system: Linux
System_Drive: N/A
32bit or 64bit: 64 Bit
motherboard: ASUS P67 Revolution
processor: Intel 3770k 4.6GHz
ram: 16GB
Video Card: Nvidia GTX 480 SLI
Hard_Drive_Capacity: 240GB SSD
Monitor/Display Make & Model: 3 x ASUS ML248H
Location: New York

Re: Edge Line Artifact on Output

Post by klaxian »

Yup, I have begun noticing this with CA correction too. Unfortunately, the workaround of enabling Wavelet doesn't seem to fix the problem with CA correction. I reported it on the Monkey, but it seems like this has been a known issue for a long time and hasn't been resolved.
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