adjustFrame.py

from tkinter import Toplevel, Label,Scale,Button,HORIZONTAL,RIGHT
import cv2

class AdjustFrame(Toplevel):
    def __init__(self,master=None):
        Toplevel.__init__(self,master=master)

        self.brightness_value = 0
        self.previous_brightness_value = 0

        self.original_image = self.master.processed_image
        self.processing_image = self.master.processed_image

        self.brightness_label = Label(self,text="Brightness")
        self.brightness_scale = Scale(self,from_=0,to_=2,length=250,resolution=0.1,orient=HORIZONTAL)
        
        self.r_label = Label(self,text="R")
        self.r_scale = Scale(self,from_=-100,to_=100,length=250,resolution=1,orient=HORIZONTAL)

        self.g_label = Label(self,text="G")
        self.g_scale = Scale(self,from_=-100,to_=100,length=250,resolution=1,orient=HORIZONTAL)

        self.b_label = Label(self,text="B")
        self.b_scale = Scale(self,from_=100,to_=250,length=250,resolution=1,orient=HORIZONTAL)

        self.apply_button = Button(self,text="Apply")
        self.preview_button = Button(self,text="Preview")
        self.cancel_button = Button(self,text="Cancel")

        self.brightness_scale.set(1)

        self.apply_button.bind("<ButtonRelease>",self.apply_button_released)
        self.preview_button.bind("<ButtonRelease>",self.show_button_released)
        self.cancel_button.bind("<ButtonRelease>",self.cancel_button_released)

        self.brightness_label.pack()
        self.brightness_scale.pack()
        self.r_label.pack()
        self.r_scale.pack()
        self.g_label.pack()
        self.g_scale.pack()
        self.b_label.pack()
        self.b_scale.pack()
        self.cancel_button.pack(side=RIGHT)
        self.preview_button.pack(side=RIGHT)
        self.apply_button.pack()

    def apply_button_released(self,event):
        self.master.processed_image = self.processing_image
        self.close()

    def show_button_released(self,event):
        self.processing_image = cv2.convertScaleAbs(self.original_image,alpha=self.brightness_scale.get())
        b,g,r = cv2.split(self.processing_image)

        for b_value in b:
            cv2.add(b_value,self.b_scale.get(),b_value)
        for g_value in g:
            cv2.add(g_value,self.g_scale.get(),g_value)
        for r_value in r:
            cv2.add(r_value,self.r_scale.get(),r_value)
            
        self.processing_image = cv2.merge((b,g,r))
        self.show_image(self.processing_image)

    def cancel_button_released(self,event):
        self.close()
        
    def show_image(self,img=None):
        self.master.image_viewer.show_image(img=img)
        
    def close(self):
        self.show_image()
        self.destroy()