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CMOS vs CCD


fotografr

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I know there are people on this forum who are a lot more tech savvy than I am, so I'm hoping someone can answer this question. Are CMOS chips less prone to dead/hot pixels than CCDs?

 

The reason for the question is that my Monochrom has just gone in for a hot pixel fix for the second time in six months. Is this normal?

 

If it was just one little spot, I'd fix it in Photoshop. But there's a white line that extends above and below the hot pixel and it can be a pain to deal with.

 

Thanks,

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Are CMOS chips less prone to dead/hot pixels than CCDs?

I am not aware of any difference (or any reason why there should be a difference in this respect).

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"The search engine is your friend" as they say :)

 

First, it's a good idea to understand the difference between Dead/Stuck/Hot Pixels, here.

 

According to IDS, a solution provider, CCDs are less prone to hot pixels (not dead pixels) than CMOS: here.

 

Here's the overall Wiki entry, here.

 

One conclusion you can draw is that for a manufacturer with a higher QC and since CMOS are generally less costly than CCDs, there might be a smaller population of high dead-pixel-count imagers released to the camera assembly process.

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If it was just one little spot, I'd fix it in Photoshop. But there's a white line that extends above and below the hot pixel and it can be a pain to deal with.

 

With Photoshop there is a very simple, easy way to make an action that can fix the stuck or hot pixels automatically, in 'batch' for any number of images. Should we show you how? Or would you rather ignore the money you spent on Photoshop.

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With Photoshop there is a very simple, easy way to make an action that can fix the stuck or hot pixels automatically, in 'batch' for any number of images. Should we show you how? Or would you rather ignore the money you spent on Photoshop.

 

 

Actually, you don't have to. I just found this on another thread and assume it's what you're referring to:

 

" Originally Posted by pico View Post

I do not know if this will be helpful to you, but ...

 

At work I had to fix a lot of pictures from the same camera where it had a dead pixel row. I created an action in Photoshop and saved it as a droplet. It worked beautifully and patched all the images in a couple minutes. It worked because the location was identical in every frame, as one should expect.

 

Briefly, the action was something like this: Copy background layer to new layer. Select single-pixel row (or column) marquee in the new layer. Move it carefully just a pixel to the right of the white (dead pixel) row or column. Command-C. Them move it over the dead row or column. Command-V. Flatten image. Save."

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A while back Dougg posted a link to an Applescript that adds an opcode to a DNG file to map out the row that happens from a Bad Pixel. The author Eric Chan says it was written for images captured with CCD sensors. It works well with M9 DNG files but I don't know about CMOS files.

Does anyone know Leica New Jersey's turn around time for sensor remapping ?

 

Roy

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A while back Dougg posted a link to an Applescript that adds an opcode to a DNG file to map out the row that happens from a Bad Pixel. The author Eric Chan says it was written for images captured with CCD sensors. It works well with M9 DNG files but I don't know about CMOS files.

Does anyone know Leica New Jersey's turn around time for sensor remapping ?

 

Roy

 

Last time it happened to me, the camera (MM) was back in my hands 10 days after I sent it in. Very quick service.

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A while back Dougg posted a link to an Applescript that adds an opcode to a DNG file to map out the row that happens from a Bad Pixel. The author Eric Chan says it was written for images captured with CCD sensors. It works well with M9 DNG files but I don't know about CMOS files.

Does anyone know Leica New Jersey's turn around time for sensor remapping ?

 

Roy

 

Since there is currently a major reshuffle of "experts" in CS NJ, what has happened in the past could now be different for many of us until new and (hopefully) added people are up to good speed on common service issues.

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