Color Correction easier with a 3 sensor camera

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    • #51282

      I tend to do a bit of color correction.  Does anyone know if using footage from a camera that has 3 sensors (one for each primary color), allows for more isolated control of color correction during post?  More than a single larger sensor?


        I'm looking a the the VG20 and I'm using a TM900 and it has 3 sensors in it and I love the control it gives me when I color correct.  Just curious is that versatility is more associated with footage from a camera with 3 sensors, rather than a camera with one (albeit larger sensor).  The VG20 has a much larger sensor, but I don't want to lose the color correction control in post. 


        Anyone in videomaker land aware of this?


        If I do lose latitude in post regarding color correction, I may try to find the best 3 sensor camcorder I can find for under $3000.



    • #204491

      Here's my two sense based on my understanding of sensors:


      I really think if there is a difference these two cameras, it's very minimal.


      When a camera like the VG20 utilizes a single CMOS sensor, I believe that CMOS sensor records incoming light with a bayer pattern, where the pixles are arranged as follows:







      A pixel is sensitive to only one primary color and the other two values that it should be picking up are interpolated based on the surrounding pixels. For example, if a pixel is sensitive to green light, the red and blue light that it should be recorded is only interpolated (aka: guessed) based upon adjacent pixels that are sensitive to red and blue.


      When you have 3 sensors, that allows all primary colors to be recorded for every pixel.


      What makes your question tricky is sensor size. The VG20's sensor is much larger than the TM900's 1/4" sensors. So while VG20 is doing much more interpolation, the size of the sensor may mean it has just as many red-, green-, and blue-sensitive pixels as TM900. Does that make sense?


      If you were comparing two cameras that used sensors of the same size, but one was 3-Chip and the other was only single chip, the 3-chip would win, hands down.


      Furthermore, both cameras utilize AVCHD/H.264/MPEG-4 compression, which utilizes 4:2:0 chroma sampling. If you don't know what that means, it means the cameras are throwing away a lot of color information in order to provide smaller file sizes. 


      So at the end of the day, if there is a difference between the two cameras, I think it will be minimal. But I think you'll be fine for the color correction. I think you'll only start to see problems if you attempt any aggressive corrections. Make sure you give your camera enough light and you will be fine.


      Hope that helps…

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