Does anyone know how to use dithering technique to convert 16 bit bitmap image to low depth color such as 12 bpp or 8 bpp for LCD display...?
The source is RGB565 bmp format convert to RGB444 or RGB323 format.
I guess that there are many algorthm exist for PC but we would like to perform it on arm with limited resource. I don't care about dithering algorithm's efficiency, but care about the dithering algorithm's quality.
Thanks in advance.
I guess that there are many algorthm exist for PC
No. They're algorithms for every platform. They don't exist "for" the PC any more than your local electricity company exists "for" you.
would like to perform it on arm with limited resource. I don't care about dithering algorithm's efficiency,
Hmm... now you're contradicting yourself from one sentence to the next. As a matter of fact, your current ARM CPU is quite likely faster than PCs were for the first decade of their existence. And dithering has been around for quite a while before that...
In other words, you're asking the wrong people. You should be consulting books or other resources concerned with computer graphics in general. The fact that you're doing this on an ARM is quite irrelevant to the issue at hand.