I would like to compress and image using PIL, but when I execute it the image is still the same size. How do I solve it?
What I tried so far?
img.save('Compressed_image.tiff', dpi=[300,300], quality=35)
I tried to change the quality but the file size is always the same.
define the new width and height of the image
then use the following to downscale, before saving
img = img.resize( (width, height), Image.LANCZOS)
also, since TIFF is a lossless format, reducing the quality parameter would not have any effect on the saved filesize.
Related
I have an image that I need to enlarge and enhance its quality for better reading
I tried the following using Pillow to resize the image but I still can't read it well
from PIL import Image
img = Image.open('Sample.jpg')
resized_img = img.resize((2450, 3283))
resized_img.save('Output.png')
Here's a sample of the image
I have an image viewer that shows the selected image. However I have different sizes of images and I would like to access the selected image size in order to have a fixed GUI. Otherwise GUI resizes and images are not showing properly. Is there any way to see the size of an image? After I get the image size I am thinking of subsampling according to its size. Thanks.
from PIL import Image
with Image.open('test.png') as im:
size = im.size
print(size)
Here is a way using PIL Image package.
I am trying to lower the file size of an image using pillow (pil) however lowering the image quality doesn't lower the size of the saves image.
The saved images 'image2' and 'image3' are the same size.
import PIL from Image
im = Image.open('image.png')
im.save('image2.png', quality=100)
im.save('image3.png', quality=10)
The PNG format only supports lossless compression, for which the compression ratio is usually limited and not freely adjustable.
If I am right, there is a variable parameter that tells the compressor to spend more or less time finding a better compression scheme. But without a guarantee to succeed.
You have to use image compression to reduce sizes - pngquant or similar
https://pngquant.org/
I want to paste an image into a single coloured background using PIL but some blures and noises appear around pasted photo like this:
(Zoom photo to see noises. I think it is due from Antialiasing) But I want to paste with sharp boundaries like here :
I am using this codes for paste:
my_image.convert('RGBA')
background = Image.new("RGBA", (background_size), background_color)
background.paste( my_image, (coordinates), my_image )
background.save("result.jpg")
What sholud i do for pasting with sharp boundaries?
Thanks.
jpg is a lossy format, so it may blur your image or add noise, in order to save memory. Use a lossless format like png instead:
background.save("result.png")
I want to change the resolution of the .bmp image in python. ( i.e. the pixel/inch information) . Using PIL, for jpg image, for instance, the following code works fine
import Image
im = Image.open("myImg.jpg)
im.save("output.jpg", dpi = (75, 75) )
If you view this in some image editing software like GIMP, it shows the Pixel per inch as 75, 75.
But the above code doesn't work when the input image is a .bmp file.
Could someone tell me how to change image resolution for any image in python?
I suspect that there aren't many programs out there that respect bmp resolution. Windows bitmaps are all 96 dpi.
Also, It looks as though PIL doesn't support a resolution parameter for bitmaps. My PIL/BmpImagePlugin.py just writes in $01000000 for the x & y resolution (i'm not sure what that translates to, but I'd guess "96 dpi").
There are docs which tell you how to write your own extension .. I'd guess it would be pretty simple to make a copy of the PIL bitmap plugin which accepted resolution as a parameter.
I think input file can be any valid format and output need to be, jpg, pcx, png, tiff, wmf for dpi parameter I think, may be I am wrong, but when I looked at PIL source files, I don't see one for BMP files.