SA18225428-许强-Python第三次作业1
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2022-08-03
16:57:07
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打开幅格式为 gif 或 ppm 的彩图像, 如下公式将其转换为灰度图
brightness = int(round(0.299r + 0.587g + 0.1 14b))
from graphics import *
class MyImageConvert(object):
def __init__(self,filename='test.gif'):
self.image = Image(Point(150,150),filename)
width = self.image.getWidth()
height = self.image.getHeight()
self.background = GraphWin('彩图',width * 1.2, height * 1.2)
def showImage(self):
self.image.undraw()
self.image.draw(self.background)
def convertImage(self):
text = Text(Point(200,20),'点击进转换')
text.draw(self.background)
self.background.getMouse()
text.undraw()
text = Text(Point(200,20),'正在转换~~~')
text.draw(self.background)
img = self.image
for x in range(img.getHeight()):
for y in range(img.getWidth()):
r, g, b = img.getPixel(x, y)
grayscale = int(round(0.299 * r + 0.587 * g + 0.114 * b))
img.setPixel(x, y, color_rgb(grayscale, grayscale, grayscale))
text.undraw()
text = Text(Point(200, 20), '转换完成,单击标进保存窗')
self.background.getMouse()
text.undraw()
def saveImage(self):
grayWindow = GraphWin("灰度图",400,400)
Text(Point(200,200),'输件名').draw(grayWindow)
Text(Point(200,250),'点击空处退出').draw(grayWindow)
Text(Point(250, 200), '.gif').draw(grayWindow)
input = Entry(Point(200,200),10)
input.setText("灰度图")
input.draw(grayWindow)
grayWindow.getMouse()
filename = input.getText()
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