请给出一段完整的python程序，要求运行后打开一个主窗口。主窗口内有三个按钮，点击按钮1会打开窗口1，窗口1用来选择图像文件，选择文件后窗口1自动关闭，并在主界面显示窗口1选择的图像。点击主窗口的按钮2，会打开窗口2，窗口2用于显示主界面的图像。窗口2有三个滑动条，其中一个滑动条滑动后可以对窗口2中的图像进行无损的放大和缩小，另外两个滑动条滑动后可以调整图像在窗口2中的位置。点击主窗口的按钮3会打开窗口3，窗口三用于对图像进行伽马变换、灰度转换、二值化的预处理。窗口3中设置有三个滑动条和一个按钮，滑动条可以调节三种预处理方式的效果，窗口3实时显示调节后的效果。点击窗口3中的按钮，会打开窗口4。窗口4可以选择图片的保存地址，并将经过窗口3预处理后的图像保存在改地址中。图像保存后，窗口4自动关闭。

以下是一个满足要求的Python程序，使用了tkinter库和Pillow库来实现图像的处理和显示。

from tkinter import *
from tkinter import filedialog
from PIL import Image, ImageTk

class MainWindow:
    def __init__(self, master):
        self.master = master
        self.master.title('图像处理')
        self.img_path = None
        self.img = None
        self.img_processed = None

        self.btn1 = Button(self.master, text='选择图像', command=self.open_image_window)
        self.btn1.grid(row=0, column=0, padx=10, pady=10)

        self.btn2 = Button(self.master, text='显示图像', command=self.open_display_window)
        self.btn2.grid(row=0, column=1, padx=10, pady=10)

        self.btn3 = Button(self.master, text='预处理图像', command=self.open_process_window)
        self.btn3.grid(row=0, column=2, padx=10, pady=10)

    def open_image_window(self):
        self.img_path = filedialog.askopenfilename()
        if self.img_path:
            self.img = Image.open(self.img_path)
            self.img = self.img.resize((300, 300))
            self.img_tk = ImageTk.PhotoImage(self.img)
            self.btn1.config(image=self.img_tk, compound=LEFT)

    def open_display_window(self):
        if self.img:
            DisplayWindow(self.master, self.img)

    def open_process_window(self):
        if self.img:
            ProcessWindow(self.master, self.img)

class DisplayWindow:
    def __init__(self, master, img):
        self.master = Toplevel(master)
        self.master.title('显示图像')
        self.img = img
        self.img_tk = ImageTk.PhotoImage(self.img)

        self.canvas = Canvas(self.master, width=self.img.width, height=self.img.height)
        self.canvas.pack()
        self.canvas.create_image(0, 0, image=self.img_tk, anchor=NW)

        self.scale1 = Scale(self.master, from_=0.1, to=5.0, resolution=0.1, orient=HORIZONTAL, label='缩放比例', command=self.scale_img)
        self.scale1.pack(padx=10, pady=10)

        self.scale2 = Scale(self.master, from_=-100, to=100, orient=HORIZONTAL, label='水平偏移', command=self.move_img)
        self.scale2.pack(padx=10, pady=10)

        self.scale3 = Scale(self.master, from_=-100, to=100, orient=HORIZONTAL, label='垂直偏移', command=self.move_img)
        self.scale3.pack(padx=10, pady=10)

    def scale_img(self, scale):
        scale = float(scale)
        self.img_processed = self.img.resize((int(self.img.width*scale), int(self.img.height*scale)))
        self.img_tk = ImageTk.PhotoImage(self.img_processed)
        self.canvas.delete('all')
        self.canvas.create_image(0, 0, image=self.img_tk, anchor=NW)

    def move_img(self, scale):
        scale1 = self.scale1.get()
        scale2 = float(scale)
        scale3 = float(self.scale3.get())
        self.img_processed = self.img.resize((int(self.img.width*scale1), int(self.img.height*scale1)))
        self.img_processed = self.img_processed.transform(self.img_processed.size, Image.AFFINE, (1, 0, scale2, 0, 1, scale3))
        self.img_tk = ImageTk.PhotoImage(self.img_processed)
        self.canvas.delete('all')
        self.canvas.create_image(0, 0, image=self.img_tk, anchor=NW)

class ProcessWindow:
    def __init__(self, master, img):
        self.master = Toplevel(master)
        self.master.title('预处理图像')
        self.img = img
        self.img_processed = self.img

        self.canvas = Canvas(self.master, width=self.img.width, height=self.img.height)
        self.canvas.pack()
        self.canvas.create_image(0, 0, image=ImageTk.PhotoImage(self.img), anchor=NW)

        self.scale1 = Scale(self.master, from_=0, to=1.0, resolution=0.01, orient=HORIZONTAL, label='伽马值', command=self.gamma_transform)
        self.scale1.pack(padx=10, pady=10)

        self.scale2 = Scale(self.master, from_=0, to=1.0, resolution=0.01, orient=HORIZONTAL, label='灰度值', command=self.gray_transform)
        self.scale2.pack(padx=10, pady=10)

        self.scale3 = Scale(self.master, from_=0, to=255, orient=HORIZONTAL, label='阈值', command=self.threshold_transform)
        self.scale3.pack(padx=10, pady=10)

        self.btn1 = Button(self.master, text='保存图像', command=self.save_image)
        self.btn1.pack(padx=10, pady=10)

    def gamma_transform(self, scale):
        gamma = float(scale)
        self.img_processed = self.img.point(lambda x: x ** gamma)
        self.canvas.delete('all')
        self.canvas.create_image(0, 0, image=ImageTk.PhotoImage(self.img_processed), anchor=NW)

    def gray_transform(self, scale):
        gray = float(scale)
        self.img_processed = self.img.convert('L').point(lambda x: x * gray)
        self.canvas.delete('all')
        self.canvas.create_image(0, 0, image=ImageTk.PhotoImage(self.img_processed), anchor=NW)

    def threshold_transform(self, scale):
        threshold = int(scale)
        self.img_processed = self.img.convert('L').point(lambda x: 255 if x > threshold else 0)
        self.canvas.delete('all')
        self.canvas.create_image(0, 0, image=ImageTk.PhotoImage(self.img_processed), anchor=NW)

    def save_image(self):
        img_path = filedialog.asksaveasfilename(defaultextension='.jpg')
        if img_path:
            self.img_processed.save(img_path)
            self.master.destroy()

root = Tk()
app = MainWindow(root)
root.mainloop()

这个程序实现了所需的功能，但是还有很多可以改进的地方。例如，可以增加错误处理、界面美化、更多的图像处理方式等等。