2 bit dithered images

imageconverter/img2array.py

@@ -3,6 +3,9 @@ import math
 import argparse
 import os.path
 
+#for a 2-bit dithered grayscale image use: 
+# convert testimage.png -dither FloydSteinberg -define dither:diffusion-amount=85% -remap 4gray.png -compress RLE -define png:color-type=6 output.png
+
 
 def swapBits(number, nbits):
     if nbits==2:

src/main.cpp

@@ -64,7 +64,7 @@ void setup()
     Paint_SelectImage(GSImage);
     Paint_SetScale(4);
 
-    Paint_DrawBitMap(gImage_4in2);
+    Paint_DrawBitMap(gImage_4in2);   //to convert 2-bit gray image to array: convert testimage.png -dither FloydSteinberg -define dither:diffusion-amount=85% -remap 4gray.png -compress RLE BMP3:output.bmp 
     EPD_4IN2_4GrayDisplay(GSImage);
 
     DEV_Delay_ms(10000);