Based on your description, you want scipy.ndimage.zoom. Bilinear interpolation would be order=1, nearest is order=0, and cubic is the default (order=3). zoom is specifically for regularly-gridded data that you want to resample to a new resolution. As a quick example: import numpy as np import scipy.ndimage x = np.arange(9).reshape(3,3) print ‘Original array:’ print x print … Read more
from PIL import Image image_file = Image.open(“convert_image.png”) # open colour image image_file = image_file.convert(‘1’) # convert image to black and white image_file.save(‘result.png’) yields
You need to convert the image to RGB mode. Image.open(‘old.jpeg’).convert(‘RGB’).save(‘new.jpeg’)
You need to make the following changes: append a tuple (255, 255, 255, 0) and not a list [255, 255, 255, 0] use img.putdata(newData) This is the working code: from PIL import Image img = Image.open(‘img.png’) img = img.convert(“RGBA”) datas = img.getdata() newData = [] for item in datas: if item[0] == 255 and item[1] … Read more
I’m a little late to reply here, but I ran into a similar problem and I wanted to share my solution. First, here’s a pretty typical stack trace for this problem: Traceback (most recent call last): … File …, line 2064, in … im.thumbnail(DEFAULT_THUMBNAIL_SIZE, Image.ANTIALIAS) File “/Library/Python/2.7/site-packages/PIL/Image.py”, line 1572, in thumbnail self.load() File “/Library/Python/2.7/site-packages/PIL/ImageFile.py”, line … Read more
JPG does not support transparency – RGBA means Red, Green, Blue, Alpha – Alpha is transparency. You need to discard the Alpha Channel or save as something that supports transparency – like PNG. The Image class has a method convert which can be used to convert RGBA to RGB – after that you will be … Read more
Deprecation Warning: textsize is deprecated and will be removed in Pillow 10 (2023-07-01). Use textbbox or textlength instead. Code using textbbox instead of textsize. from PIL import Image, ImageDraw, ImageFont def create_image(size, bgColor, message, font, fontColor): W, H = size image = Image.new(‘RGB’, size, bgColor) draw = ImageDraw.Draw(image) _, _, w, h = draw.textbbox((0, 0), … Read more
This can be accomplished with an Image instance’s paste method: from PIL import Image img = Image.open(‘/path/to/file’, ‘r’) img_w, img_h = img.size background = Image.new(‘RGBA’, (1440, 900), (255, 255, 255, 255)) bg_w, bg_h = background.size offset = ((bg_w – img_w) // 2, (bg_h – img_h) // 2) background.paste(img, offset) background.save(‘out.png’) This and many other PIL … Read more
From near the beginning of the PIL Tutorial: Once you have an instance of the Image class, you can use the methods defined by this class to process and manipulate the image. For example, let’s display the image we just loaded: >>> im.show() Update: Nowadays the Image.show() method is formally documented in the Pillow fork … Read more
Thanks everyone for your help. Finally got it resolved!! import io img = Image.open(fh, mode=”r”) roi_img = img.crop(box) img_byte_arr = io.BytesIO() roi_img.save(img_byte_arr, format=”PNG”) img_byte_arr = img_byte_arr.getvalue() With this i don’t have to save the cropped image in my hard disc and I’m able to retrieve the byte array from a PIL cropped image.