Using "GIMP"

[José Pereira]

Hello people.

 

Untill now I was changing manually the some colours and porting to "AIS".

 

Some months ago, PeteD advises me to use "GIMP".

I saw it and it seems so complicated that I never try.

But today I was thinking and why not?

I want to simple port images from 8bit (mainly C64), so what I want is simply port the 16colours into 4colours I see that can be Backgr.,PF0->2.

Then Import to "AIS" and finally the good one "G2F".

 

 

I've been trying to see how to do that thing of the "indexed colours". Understand what I mean:

For ex.- Blue, Green, Gray into Gray (all for PF0 use, with DLIs. I re-done them).

 

 

Need help in doing this...

 

 

Thanks.

Greetings.

José Pereira.

[AB Positive]

Let me get this straight so I can possibly help - I've used GIMP for a good while but never for A8 or to go down colors...

 

So you want to take an image in a 16 color palette and drop it to a 4-color palette but you also want control over which 4 colors get used, yes?

[José Pereira]

Let me get this straight so I can possibly help - I've used GIMP for a good while but never for A8 or to go down colors...

 

So you want to take an image in a 16 color palette and drop it to a 4-color palette but you also want control over which 4 colors get used, yes?

 

 

Yes, if it is possible that better.

You know that with our "A8 Eyes" you saw a picture and starting thinking: "DLIs. here and there, PMs. here and..., PRIOR...

Like this I have to probably changing 3different colours (Blue, Red, Green) into one (any colour, G2F with DLI. re-paint).

 

Thanks.

José Pereira.

[PeteD]

Let me get this straight so I can possibly help - I've used GIMP for a good while but never for A8 or to go down colors...

 

So you want to take an image in a 16 color palette and drop it to a 4-color palette but you also want control over which 4 colors get used, yes?

 

 

Yes, if it is possible that better.

You know that with our "A8 Eyes" you saw a picture and starting thinking: "DLIs. here and there, PMs. here and..., PRIOR...

Like this I have to probably changing 3different colours (Blue, Red, Green) into one (any colour, G2F with DLI. re-paint).

 

Thanks.

José Pereira.

 

One way to do it with a C64 image with a 16 colour index is to open the colormap dialog, choose 4 colours on there, write down their RGB values then change the other colours to those 4 RGB values. When you've done all that convert the image to RGB then back to indexed with an index of 4.

 

There's also a way to do it where you remap a colour on the image to a colour from the palette which is probably a bit faster but I can't remember how that works atm.

 

 

Pete

[Tezz]

Jose, Load your image into GIMP, goto "Image" in the pull down menu and into "Mode", Select "Indexed". Indexed colour conversion will now be displayed. Choose "Generate optimum palette" and below this the box to enter your number of colours to index. If you choose 256 with this selection, the number of actual colours used will be counted and the image will be converted with an indexed palette with these colours only.

 

If you are converting a 16 colour c64 pic from a bmp saved in higher col depth, convert the bmp to the actual 16 colours as above and then manually edit the indexed palette duplicating the colours apropriately to manually reduce the amount to 4 visibly, then convert back to RGB and again repeat the process above to index it to 4 actual colours

 

EDIT. Pete has already replied!

Edited January 22, 2010 by Tezz

[dwhyte]

Once you've dropped the palette down to the four colours that you want, you can use the Colormap to set the colours to the ones you want (Windows->Dockable dialogs->Colourmap).