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POcentring an image ontop of another one in python(PIL), then hiding one inside the other
 

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  1. POcentring an image ontop of another one in python(PIL), then hiding one inside the other
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    <p>The task is to make two functions one that embeds a grayscale image inside a RGB one. The second then shows the hidden "watermark". I've completed the task( there is 15 tests the code must pass I passed them all :D), but I want to tidy up my code if possible. I have been told that I could have used the crop function to centre the water mark on top of the photo(I couldn't work out how to do this) instead I used math logic. </p> <pre><code>from PIL import Image #function for embedding the watermark def add_watermark(clean_file, watermark_file): #if the files are not compatible #or doesn't exist end the function try: clean_photo = Image.open(clean_file) watermark_photo = Image.open(watermark_file) except: return False #the images pixels tuple values are attained clean_photo_size = clean_photo.size watermark_photo_size = watermark_photo.size # .load was used to return a pixel access object # that can be used to read and modify pixels #for both images photo_array = clean_photo.load() watermark_array = watermark_photo.load() #centring the watermarked image on the photo start_x_coord=int((clean_photo_size[0]-watermark_photo_size[0])/2) start_y_coord=int((clean_photo_size[1]-watermark_photo_size[1])/2) #for the pixels that share the same position as the pixels in the #watermark, manipulate their RGB tuple value to include the watermarks #greyscale value as part of the original RGB tuple for line in range(watermark_photo_size[0]): for rank in range(watermark_photo_size[1]): photo_array [(start_x_coord+line),\ (start_y_coord+rank)]\ =(int(((photo_array [(start_x_coord+line),\ (start_y_coord+rank)][0]/10)*10)\ +((watermark_array[line,rank]/100)%10)),\ int(((photo_array [(start_x_coord+line),\ (start_y_coord+rank)]\ [1]/10)*10)+((watermark_array[line,rank]/10)%10)),\ int(((photo_array [(start_x_coord+line),\ (start_y_coord+rank)][2]/10)*10)\ +(watermark_array[line,rank]%10))) #create a new file name with _X at the end new_File_Name = clean_file[:-4]+"_X"+clean_file[-4:] #create a new file clean_photo.save(new_File_Name) #return true for the test return True </code></pre> <p>I tried to make this post spelling and grammar correct, but I have been awake for 20 hours now so I apologize if I missed anything.</p>
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