Create monocolour-converter.py

Calendar/monocolour-converter.py

@@ -0,0 +1,102 @@
+"""
+This is a python image converter specific for the E-Paper-Calendar
+on github by aceisace from the link below.
+(https://github.com/aceisace/E-Paper-Calendar-with-iCal-sync-and-live-weather)
+
+It will convert the 3-colour .bmp's to 2-colour .bmp's so that they can be
+used even with the 2-Colour 7.5" E-Paper Display from waveshare.
+
+Please use with caution. If the input and output paths are the same, the
+convertr will overwrite all .bmp files. It's highly recommended to make a
+backup of the entire 'Calendar" folder first.
+
+Copyright by Ace-Laboratory
+"""
+
+"""
+Info: These paths contain the bmps that require converting.
+1) /home/pi/E-Paper-Master/Calendar/months/ + language
+3) /home/pi/E-Paper-Master/Calendar/other/ + language
+"""
+path = '/home/pi/E-Paper-Master/Calendar/'
+#--------------only change the following lines-----------------#
+input_path_1 =  path+/'other/de/'
+output_path_1 = path+'other/de/'
+
+input_path_2 =  path+'months/de/'
+output_path_2 = path+'months/de/'
+
+input_path_3 =  path+/'other/en/'
+output_path_3 = path+'other/en/'
+
+input_path_4 =  path+/'other/en/'
+output_path_4 = path+'other/en/'
+#-----------------no need to change anything below-----------------#
+
+import glob, os, errno
+from PIL import Image
+import PIL.ImageOps
+
+imagenames_1 = []
+imagenames_2 = []
+imagenames_3 = []
+imagenames_4 = []
+
+print('opening the specified directory...')
+
+os.chdir(input_path_1) #folder containg files
+for files in glob.glob('*.bmp'): #find bmp files
+    imagenames_1.append(files) #add these files to a list
+print('Found these files:', imagenames_1) #print this list
+
+os.chdir(input_path_2) #folder containg files
+for files in glob.glob('*.bmp'): #find bmp files
+    imagenames_2.append(files) #add these files to a list
+print('Found these files:', imagenames_2) #print this list
+
+os.chdir(input_path_3) #folder containg files
+for files in glob.glob('*.bmp'): #find bmp files
+    imagenames_3.append(files) #add these files to a list
+print('Found these files:', imagenames_3) #print this list
+
+os.chdir(input_path_4) #folder containg files
+for files in glob.glob('*.bmp'): #find bmp files
+    imagenames_4.append(files) #add these files to a list
+print('Found these files:', imagenames_4) #print this list
+
+
+# 0 is black, 255 is white, 127 is red.
+# The following will convert the 'red' parts to white parts.
+thresh = 100 # any value below 127 works.
+fn = lambda x : 255 if x > thresh else 0
+
+try:
+    print('checking if the first output path exists...')
+    os.makedirs(output_path_1)
+except OSError as e:
+    print('Oh, the first output path exists already. Assuming you know what you are doing.')
+    print('Will attempt to overwrite all .bmp files')
+    if e.errno != errno.EEXIST:
+        raise
+        
+try:
+    print('checking if the second output path exists...')
+    os.makedirs(output_path_2)
+except OSError as e:
+    print('Oh, the second output path exists already. Assuming you know what you are doing.')
+    print('Will attempt to overwrite all .bmp files')
+    if e.errno != errno.EEXIST:
+        raise
+        
+print('attempting to convert images...')   
+for files in imagenames_1:
+    ((Image.open(input_path_1+files)).convert('L').point(fn, mode='1').save(output_path_1+files))
+for files in imagenames_2:
+    ((Image.open(input_path_2+files)).convert('L').point(fn, mode='1').save(output_path_2+files))
+for files in imagenames_3:
+    ((Image.open(input_path_3+files)).convert('L').point(fn, mode='1').save(output_path_3+files))
+for files in imagenames_4:
+    ((Image.open(input_path_4+files)).convert('L').point(fn, mode='1').save(output_path_4+files))
+
+print('All done!')
+print('The bmp have been converted. Good luck!')