DS Lite colorspace filter

[Brankale]

It's an odd request but it would be awesome to have a filter to mimic the DS Lite screen.

I ask for this because DS Lite lcd screen (and maybe the original DS and DSi) seems to have more vivid colors. It's not a big problem but in some games there's a really big difference.

This is a comparison between a DS Lite lcd screen (the first) and 2DS lcd screen (the second):

They are not great photos but at least they can give you an idea.

The 2DS screen has colors which are definitly washed out compared to the DS Lite. I also calibrated my monitor in the best way I could but is much closer to the 2DS screen.

I don't know if it's just an effect due to the low resolution and the black gap between pixels but in the end colors looks different.

[Arisotura]

well, melonDS renders the colors are they are provided by the game. it would be possible to apply color effects, but I'm not sure how to make it look more like a DSLite screen -- imo DSLite screens already have pretty good colors. I could look more in depth into this, this isn't a high priority atm tho.

[ghost]

No$gba got something like that I think. You can put the screen settings to be similar to the DS Lite and it will also change the colors as well.

[Brankale]

No$gba got something like that I think.

Yes, you are right, I've never noticed it. On No$gba is more similar to the DS Lite lcd screen.

I took some screenshots just for comparison:

No$gba (DS Lite):

MelonDS

Color temperature is different

[Brankale]

I'm playing with colour spaces conversions and I'm getting somewhere near to the correct result but I need the correct values for the gamma of every channel (i.e. red, green, blue) in order to do a good job and also not to go crazy. Currently I have only the gamma for the greyscale but it's not enough or so I think. So if anyone knows these values, please write them here.

[Brankale]

I wrote a converter which, in theory, should be able to modify image colors to reproduce DS Lite screen colors. It's not perfect for a varierity of reasons:

• i don't know the exact gamma for every channel
• my best monitor has an average DeltaE of 1.24 which is good but not perfect
• my DS Lite screen can have problems (as you can see in images above)
• DS Lite has a lot of colours outside the sRGB gamut and this means they can't be reproduce accurately in any way

I uploaded a Java program (both JAR and source code if you don't trust the JAR): converter.zip

To convert an image you should do: java -jar JAR_PATH IMAGE_PATH from the command line

I would appreciate if you can try it and tell me if it's similar to a DS Lite screen.

NB: Your screen MUST be well calibrated according to the sRGB standard otherwise colours will look totally different!

NB: If I remember correctly, I have seen from a friend of mine who has a DSi that colors are similar to DS Lite, so if you have a DSi you can use this program.

NB: At first when looking at the converted image, you can think it's too blue-ish but if you compare it with a DS Lite screen it should be similar.

Just for reference I took info from this website: https://www.displaymate.com/psp_ds_shootout.htm

[Brankale]

I'll post some images here to show the output of the converter:

MelonDS output on the left / Converted image on the right: