[英]Change RGB of an Image using python
I'm trying to change the color of an image using RGB values in python, for example, if I want to change my image to grayscale I want to be able to manipulate the RGB values of the image.我正在尝试使用 python 中的 RGB 值更改图像的颜色,例如,如果我想将图像更改为灰度,我希望能够操纵图像的 RGB 值。 I've read that if I want my image in grayscale I would have to do something like Gray = (RedValue + GreenValue + BlueValue) / 3 .
我已经读过,如果我想要灰度图像,我将不得不做类似Gray = (RedValue + GreenValue + BlueValue) / 3的事情。
Here's my attempt code:这是我的尝试代码:
import tkinter as tk
from tkinter import *
from PIL import ImageTk, Image
from tkinter import filedialog
import os
import numpy as np
root = Tk()
root.geometry("550x300+300+150")
root.resizable(width=True, height=True)
#Find image
def openfn():
filename = filedialog.askopenfilename(title='Open')
return filename
#Here's where we load the image
def open_img():
x = openfn()
img = Image.open(x)
img = img.resize((350, 350), Image.ANTIALIAS)
img = ImageTk.PhotoImage(img)
panel = Label(root, image=img)
panel.image = img
panel.grid()
def gray():
imagen = openfn()
img = Image.open(imagen)
img = img.convert("RGB")
datas = img.getdata()
new_image_data = []
for item in datas:
if item[0] in list(range(0, 255)):
new_image_data.append((20, 40, 60))
else:
new_image_data.append(item)
img.putdata(new_image_data)
img.save("gray_image.png")
img = img.resize((250, 250), Image.ANTIALIAS)
img = ImageTk.PhotoImage(img)
panel = Label(root, image=img)
panel.image = img
panel.grid()
#buttons
btn = tk.Button(root, text='Select an image', command=open_img).grid(column=0,row=0)
gray = tk.Button(root, text='Gray filter', command=gray).grid(column=1,row=0)
root.mainloop()
I made a function called gray where I reloaded the image and change it's colors, but I don't want that, I want to apply changes to the image I loaded.我制作了一个名为 gray 的 function,我在其中重新加载了图像并将其更改为 colors,但我不希望这样,我想对加载的图像应用更改。
Hope you can help me out.希望你能帮助我。
Try this:尝试这个:
import tkinter as tk
from tkinter import *
from PIL import ImageTk, Image
from tkinter import filedialog
import os
import numpy as np
root = Tk()
root.geometry("550x300+300+150")
root.resizable(width=True, height=True)
#Find image
def openfn():
filename = filedialog.askopenfilename(title="Open")
return filename
#Here's where we load the image
def open_img():
global filename, img, tk_img, panel
filename = openfn()
img = Image.open(filename)
img = img.resize((350, 350), Image.ANTIALIAS)
tk_img = ImageTk.PhotoImage(img)
panel = Label(root, image=tk_img)
panel.grid()
def apply_gray_filter():
global tk_img
draw = img.load()
width, height = img.size
# For each pixel
for x in range(width):
for y in range(height):
# Get the value as (r, g, b) using draw[x, y] and then average it
gray = sum(draw[x, y])/3
# turn it into an int
gray = int(gray)
# Change the pixel's value
draw[x, y] = (gray, gray, gray)
# Display the new image
tk_img = ImageTk.PhotoImage(img)
panel.config(image=tk_img)
#buttons
select_img_button = tk.Button(root, text="Select an image", command=open_img)
select_img_button.grid(column=0, row=0)
gray_filter_button = tk.Button(root, text="Gray filter",
command=apply_gray_filter)
gray_filter_button.grid(column=1, row=0)
root.mainloop()
It loops through all of the pixels and converts each one to grey scale.它循环遍历所有像素并将每个像素转换为灰度。 For some reason, if you press it multiple times it will turn the image into white.
出于某种原因,如果您多次按下它,它会将图像变成白色。 I have no idea why.
我不知道为什么。
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