Hi,
We want to make some model TV Sets for the windows of the Radio Shops in
Wimborne Model Town and have obtained a 1.5 inch OLED Display. This is a
general OLED display module, 1.5inch diagonal, 128*128 pixels, 16-bit grey
level, with embedded controller, communicating via SPI or I2C interface.
Using the supplied example code it works quite well, but when I try to display
an image that I've produced I'm getting the following error:
Traceback (most recent call last):
File "display_tv_screensv02.py", line 87, in <module>
main()
File "display_tv_screensv02.py", line 80, in main
display_image()
File "display_tv_screensv02.py", line 63, in display_image
OLED.OLED_ShowImage(image,0,0)
File "/home/pi/TV_SW/OLED_Driver.py", line 294, in OLED_ShowImage
Pixels_Color = ((Pixels[2*i, j]&0x0f)<<4) | ((Pixels[2*i+1, j]&0x0f))
IndexError: image index out of range
The supplied image has the following properties (as provided by The Gimp:
Size in Pixels: 128 x 128
Print size: 45.2 × 45.2 millimeters
Resolution: 71.9836 × 71.9836 ppi
Color space: Indexed color (16 colors)
Precision: 8-bit gamma integer
File Type: Windows BMP image
Number of pixels: 16384
My image has these properties (I've tweaked it in The Gimp to get as close a
match as possible:
Size in Pixels: 128 x 95
Print size: 45.2 x 33.5 millimeters
Resolution: 71.9328 × 72.0299 ppi
Color space: Grayscale
Precision: 8-bit gamma integer
File Type: Windows BMP image
Number of pixels: 12160
Could the problem be something to do with the aspect ratio? Will my image
always have to be square?
Any ideas would be welcomed.
Here is the corresponding code from the supplied Python Module (line 294 is
the one containing:
Line 294 is the one containing: Pixels_Color = ((Pixels[2*i, j]&0x0f)<<4) |
((Pixels[2*i+1, j]&0x0f))
def OLED_ShowImage(self, Image, Xstart, Ystart):
if (Image == None):
return
#self.OLED_Clear(0x00)
self.OLED_SetWindows ( Xstart, Ystart, self.OLED_Dis_Column ,
self.OLED_Dis_Page)
Pixels = Image.load()
for j in range(0, self.OLED_Dis_Page):
for i in range(0, int(self.OLED_Dis_Column/2)):
#print '0 = ',Pixels[2 * i, j] & 0x0f
#print '1 = ',Pixels[2 * i + 1, j]
Pixels_Color = ((Pixels[2*i, j]&0x0f)<<4) | ((Pixels[2*i+1,
j]&0x0f))
#print 'Pixels_Color',Pixels_Color
self.OLED_WriteData(Pixels_Color)
'''
Pixels_Color1 = (Pixels[2 * i, j][0] + Pixels[2 * i, j][1] +
Pixels[2 * i, j][2])/3#RGB Data
Pixels_Color2 = (Pixels[2 * i + 1, j][0] + Pixels[2 * i + 1,
j][1] + Pixels[2 * i + 1, j][2] )/3#RGB Data
Pixels_Color8b24b1 = Pixels_Color1 * 15 /255
Pixels_Color8b24b2 = Pixels_Color2 * 15 /255
Pixels_Color = Pixels_Color8b24b1 | (Pixels_Color8b24b2 << 4)
print 'Pixels_Color[1, j]',Pixels_Color
self.OLED_WriteData(Pixels_Color)
#self.OLED_SetColor(Pixels_Color , 1, 1)
'''
--
Terry Coles
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