Save images in higher than 8-bit color depth?

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tomtom101..

Save images in higher than 8-bit color depth?

in General Discussion • Other • 8 months ago

Hi,

I am reading color sensor values from an Arduino in 10bit that I use in a sketch. The result I save to a file. The result however is always a 8bit color depth image.

The only thing I could imagine to do was this:

colorMode(RGB, 65535);

I couldn't even find helpful hints in Java's BufferedImage documentation.

Any hints?

Thanks a lot!

Replies(4)

PhiLho

Re: Save images in higher than 8-bit color depth?

8 months ago

I don't think that core Java supports more than 8 bits per pixel. Perhaps some libraries can support more.
colorMode only allows to define a range practical for a given need, but values are mapped to 0-255 internally.

tomtom101..

Re: Re: Save images in higher than 8-bit color depth?

8 months ago

Thanks for the quick response! I was a bit astonished about this limitation with Java (I'm not a Java programmer) although to be fair 24bit color depth isn't so bad after all and all thats needed for a tool like Processing which is not meant to create printable image formats in the first place.

At least colorMode() saves me the mapping from 10bit values!

The reason for my inquiry is that the RGB values I'm collection are not calibrated perfectly and will need some post-processing. Doing so within an 8bit range might become messy …

Thanks!

asimes

Re: Save images in higher than 8-bit color depth?

8 months ago

Maybe you can save r, g, and b in three ints. If you need to display them, you would have to map their values down, but at least you would still be storing the 10 bit values. If you do it this way, it would allow you to "interpret" the greater range in different ways that is outputted at 8 bit.

tomtom101..

Re: Re: Save images in higher than 8-bit color depth?

8 months ago

Thanks! I am saving them as 10bit values indeed. I use now colorMode(1023) to let Processing do the mapping for me.

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