D Lux 5 Vertical Purple lines in Video

[carlosfernandez]

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Has anyone experienced vertical purple lines in video? Not just on the viewfinder, but on the final image?

[ho_co]

Carlos, welcome to the forum!

 

I have a D-Lux 4, and the same thing can happen when an overexposed light is in the frame: It causes a line along a column or two of pixels.

 

Somewhere in the D-Lux 4 instructions there's a remark that highlights can cause this effect because of the way the sensor is wired. It goes on to say that the vertical stripe won't occur on the still file, but will appear in a movie file.

 

I'm guessing that may be what you're experiencing, but I'm sure someone with a D-Lux 5 will be along to correct me if I'm wrong.

[Bert N]

The image artifact is known as smear in CCD imagers and described here. While it can be corrected in still photos, it will be present in video. In a CCD, bright signals hitting a pixel can affect (e.g.,saturate) neighboring pixels in the same column since the pixels in the column are read out by transfering charge pixel by pixel to the readout serial register.

[mjh]

Smearing is what happens when a CCD is exposed to light during read-out (which is inevitable in live view and when recording movies). When taking still images, on the other hand, the sensor is read-out behind a mechanical shutter, thus preventing smearing.

 

In other words it is something you have to live with.