这个程序应该把图像的轮廓,然后分成不同的象限,然后给它上色,比如安迪·沃霍尔玛丽莲·梦露的照片。
“Warholize”功能之前的每个功能都有效,但它卡在我不确定该怎么做c=getPixel(picEdge,x,y)
的功能下。warholize
任何帮助将不胜感激。它应该做“让 c 成为 picEdge 中 x,y 位置的像素的颜色”
def main():
pic= makePicture( pickAFile() )
show( pic )
threshold= 10
edgePic= makeOutline( pic, threshold )
warholize(pic)
show(warholize(pic))
def difference( a, b ):
if a > b :
return a - b
else:
return b - a
def intensity( px ) :
r= getRed( px )
g= getBlue( px )
b= getGreen( px )
avg= ( r + g + b ) / 3
return avg
def makeOutline( pic, threshold ):
w= getWidth( pic )
h= getHeight( pic )
edgePic= makeEmptyPicture( w, h )
for x in range(2,w-1) :
for y in range(2,h-1):
px= getPixel( pic, x, y )
pxLeft= getPixel( pic, x-1, y )
pxUp= getPixel( pic, x, y-1 )
leftDiff= difference( intensity(pxLeft), intensity(px) )
upDiff= difference( intensity(pxUp), intensity(px) )
if leftDiff > threshold or upDiff > threshold :
setColor( getPixel(edgePic,x,y), black )
def warholize(pic):
threshold=10
picEdge=makeOutline(pic,threshold)
w= getWidth( pic )
h= getHeight( pic )
picNew= makeEmptyPicture( w, h )
for x in range(0,w,2):
for y in range (0,h,2):
c=getPixel(picEdge,x,y)
px=getPixel(picNew,x/2,y/2)
if c is black:
setColor(px,blue)
else:
setColor(px,yellow)
return picNew