캠이랑놀자/보창/숙제1

~cpp
import Image
im = Image.open("lena.jpg")
newR = Image.new("RGB",im.size)
newG = Image.new("RGB",im.size)
newB = Image.new("RGB",im.size)
sizeX, sizeY = im.size
for x in range(sizeX):
	for y in range(sizeY):
		r,g,b = im.getpixel((x,y))
		newR.putpixel((x,y),(r,0,0))
		newG.putpixel((x,y),(0,g,0))
		newB.putpixel((x,y),(0,0,b))
newR.show()
newG.show()
newB.show()

~cpp
import Image
im = Image.open("lena.jpg")
newGray = Image.new("P",im.size)
sizeX, sizeY = im.size
for x in range(sizeX):
	for y in range(sizeY):
		r,g,b = im.getpixel((x,y))
		k = (r + g + b) / 3
		newGray.putpixel((x,y),k)
newGray.show()

~cpp
import Image
im = Image.open("lena.jpg")
for x in range(50,100):
	for y in range(50,100):
		r,g,b = im.getpixel((x,y))
		im.putpixel((x,y),(r+50,g+50,b+50))
im.show()

~cpp
import Image
im = Image.open("lena.jpg")
for x in range(50,100):
	for y in range(50,100):
		r,g,b = im.getpixel((x,y))
		im.putpixel((x,y),(r-50,g-50,b-50))
im.show()

~cpp
import Image
im = Image.open("lena.jpg")

for x in range(50,100):
	for y in range(100,150):
		r1,g1,b1 = im.getpixel((x,y))
		r2,g2,b2 = im.getpixel((x,y-100))
		im.putpixel((x,y-100),((r1+r2)/2,(g1+g2)/2,(b1+b2)/2))
im.show()

~cpp
import Image
im = Image.open("lena.jpg")

for x in range(0,255,5):
	for y in range(0,255,5):
		r = g = b = 0
		for m in range(x,x+5):
			for n in range(y,y+5):
				t1,t2,t3 = im.getpixel((m,n))
				r += t1
				g += t2
				b += t3
		for m in range(x,x+5):
			for n in range(y,y+5):
				im.putpixel((m,n),(r/25,g/25,b/25))
im.show()