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@ -3,9 +3,6 @@ import math
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import argparse
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import os.path
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#for a 2-bit dithered grayscale image use:
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# convert testimage.png -dither FloydSteinberg -define dither:diffusion-amount=85% -remap 4gray.png -compress RLE -define png:color-type=6 output.png
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def swapBits(number, nbits):
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if nbits==2:
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2004
src/ImageData.cpp
2004
src/ImageData.cpp
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src/main.cpp
20
src/main.cpp
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@ -1,22 +1,6 @@
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// Library, connections and info from: https://www.waveshare.com/wiki/E-Paper_ESP32_Driver_Board#Resource
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// Display: https://www.waveshare.com/product/4.2inch-e-paper.htm
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//Convert to 1 bit grayscale:
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//maybe dither before
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// convert image to array:
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// python3 img2array.py -i image.png
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//Convert to 2 bit grayscale dithered:
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// first convert image to dithered 2 bit image:
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// convert testimage.png -dither FloydSteinberg -define dither:diffusion-amount=85% -remap 4gray.png -compress RLE -define png:color-type=6 output.png
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// then image to array:
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// python3 img2array.py --bitdepth 2 --lsbfirst --colorlsbfirst testimage.png
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// then copy generated ...png.txt content to ImageData.cpp
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/* Includes ------------------------------------------------------------------*/
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#include "DEV_Config.h"
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#include "EPD.h"
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@ -54,7 +38,7 @@ void setup()
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printf("show image for array\r\n");
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Paint_SelectImage(BWImage);
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Paint_Clear(WHITE);
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Paint_DrawBitMap(gImage_4in2);
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Paint_DrawBitMap(gImage_4in2); //to convert image use: python3 img2array.py -i image.png
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EPD_4IN2_Display(BWImage);
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free(BWImage);
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@ -80,7 +64,7 @@ void setup()
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Paint_SelectImage(GSImage);
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Paint_SetScale(4);
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Paint_DrawBitMap(gImage_4in2);
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Paint_DrawBitMap(gImage_4in2);
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EPD_4IN2_4GrayDisplay(GSImage);
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DEV_Delay_ms(10000);
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