任务是制作两个函数一个是在RGB中嵌入灰度图像。第二个显示隐藏的“水印”。我已经完成了任务(代码必须通过15个测试,我全部通过了:D),但是如果可能的话,我想整理我的代码。有人告诉我,我本可以用裁剪函数在照片顶部将水印居中(我不知道如何做到这一点),而我使用的是数学逻辑。在
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
我试着更正这篇文章的拼写和语法,但我已经醒了20个小时了,所以如果我遗漏了什么,我道歉。在
以下是如何将图像水印居中放置在另一个图像上:
注意:Image和imageenhancement要求将PIL系统库安装到Python运行时
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