Replace a Color (RGB) from an Image using Python Pillow

python-pillow-image-change-background.py

from PIL import Image

img = Image.open("test_image.jpg")
img = img.convert("RGB")

datas = img.getdata()

new_image_data = []
for item in datas:
    # change all white (also shades of whites) pixels to yellow
    if item[0] in list(range(190, 256)):
        new_image_data.append((255, 204, 100))
    else:
        new_image_data.append(item)
        
# update image data
img.putdata(new_image_data)

# save new image
img.save("test_image_altered_background.jpg")

# show image in preview
img.show()

In this example, I get the first value i.e item[0] of the tuple e.g. RGB(190, 240, 200).
Hence, item[0] = 190, which in range of my condition.
Then I replace that pixel with yellow i.e RGB(255, 204, 100).

Can you please be more specific or show the code as how we are suppose to do that

@fschatbot Use MS paint's colour picker or use GIMP and guess the colour range. There is no definite method to determine the range.

hi, I'm struggling to get this to work. I assume that datas is a list of tuples and therefore item is a tuple and item[0] is the first item in that tuple. however, when I run this code, datas is a list of intergers so I get a type error because item is an int object and therefore not subscriptable. any help would be appriciated as I am new to PIL. thanks!

hi, I'm struggling to get this to work. I assume that datas is a list of tuples and therefore item is a tuple and item[0] is the first item in that tuple. however, when I run this code, datas is a list of intergers so I get a type error because item is an int object and therefore not subscriptable. any help would be appriciated as I am new to PIL. thanks!

sorry, shortly after creating this comment i fixed it. turns out on line 4 I was doing img.convert("RGB") not img=img.convert("RGB"). appologies!