0
def changeRed():
setMediaPath("/Users/addison/Downloads/Cmpt101_Pics/Learjet31A.jpg")
filename1 = "/Users/addison/Downloads/Cmpt101_Pics/Learjet31A.jpg"
source = makePicture(filename1)
halfHeight = getHeight(source)/2
for x in range(0,getWidth(source)):
for y in range(0, halfHeight):
pixel = getPixel(source, x, y)
value = getRed(pixel)
setRed(pixel, value-127.5)
show(source)
Sooo这是我的代码,现在选择图片的上半部分,并减少50%的发红。我的程序还需要选择图片的下半部分,并将红色增加50%,我该如何去做这件事?如何选择图片的下半部分?