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Monochrom horizontal black lines and hot pixel artifacts


Nick_S

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In the latest batch of photographs from my Monochrom camera I noticed a single landscape format photograph taken at ISO 10000 which has two horizontal black lines. I have included two 100% uncompressed crops from the JPG files, and there also appears to be a hot pixel located at (507, 164) in the first crop. So far, I could only find this one image with the black lines, but several others have the hot pixel in the same location. The SD HC card is a Transcend Class 4GB model.

 

Are these artefacts normal or should the camera be returned to Leica for a closer look and perhaps a sensor remapping? Any advice would be appreciated.

 

Nick

 

(moderators please correct the spelling of "artefacts" in the thread title)

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Edited by Nick_S
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In the latest batch of photographs from my Monochrom camera I noticed a single landscape format photograph taken at ISO 10000 which has two horizontal black lines. I have included two 100% uncompressed crops from the JPG files, and there also appears to be a hot pixel located at (507, 164) in the first crop. So far, I could only find this one image with the black lines, but several others have the hot pixel in the same location. The SD HC card is a Transcend Class 4GB model.

 

Are these artefacts normal or should the camera be returned to Leica for a closer look and perhaps a sensor remapping? Any advice would be appreciated.

 

Nick

 

(moderators please correct the spelling of "artefacts" in the thread title)

 

Why you taking landscapes at ISO 10000 ?

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As far as I know, vertical lines are sign of remapping needed. Horizontal lines are noise.

 

But I may be wrong. You can mail Leica in Wetzlar and ask their opinion before you send it.

Thanks, I was surprised to see single pixel width black lines against the backdrop of random noise that are horizontally oriented (i.e., taken in "landscape format", Pedaes). I checked the individual pixel values and they vary from typically (0,0,0) to (20,20,20) with some higher values occasionally appearing on the line e.g., (50,50,50).

 

Nick

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