【Educoder Assignment】※Digital Image——Green Screen Keying

【Educoder Assignment】※Digital Image——Green Screen Keying

It seems that the order is not right? Should this come before problem solving?

This assignment is much more basic than the previous blog, and most of it is the use of basic functions.

T1 gets image resolution

Nothing to say, just the whole thing$size$即可。

########## Begin #########
from PIL import Image
path = 'src/step1/boy.jpg'
img = Image.open(path)
w, h = img.size
print('宽度：%d\n高度：%d' %(w, h))
########## End ##########

T2 gets a pixel

from PIL import Image
x = int(input())  #像素的横坐标
y = int(input())  #像素的纵坐标
########## Begin ##########
img = Image.open('src/step2/boy.jpg')
print(img.getpixel((x, y)))
########## End ##########

T3 image reverse color

########## Begin ##########
from PIL import Image
path1 = 'src/step3/source/boy.jpg'
path2 = 'src/step3/student/boy2.jpg'
img = Image.open(path1)
w, h = img.size
for i in range(w) :
    for j in range(h) :
        r, g, b = img.getpixel((i, j))
        r = 255 - r; g = 255 - g; b = 255 - b
        img.putpixel((i, j), (r, g, b))
img.save(path2)
########## End ##########

T4 modify transparency

${}^{\prime }RGB{A}^{\prime }$ is also an image format

########## Begin ##########
from PIL import Image
path1 = 'src/step4/source/boy.jpg'
path2 = 'src/step4/student/boy2.png'
img = Image.open(path1)
img = img.convert('RGBA')
w, h = img.size
for i in range(w) :
    for j in range(h) :
        r, g, b, a = img.getpixel((i, j))
        img.putpixel((i, j), (r, g, b, 100))
img.save(path2)
########## End ##########

T5 cutout

########## Begin ##########
from PIL import Image
boy = Image.open('src/step5/source/boy.jpg')
boy = boy.convert('RGBA')
w, h = boy.size
for x in range(0, w):
    for y in range(0, h):
        r, g, b, a = boy.getpixel((x, y))
        if ((g + 1) / (r + g + b + 3)) > 0.4 and g > 60:  #如果是偏绿色
            a = 0
            boy.putpixel((x, y), (r, g, b, a))
boy.save('src/step5/student/boy2.png')
########## End ##########

T6 add scene

This is mainly $paste$ function riface$mask$It is clear that转载一版BOOKReference.