Develop Reference

Convert PNG images from folder to JPG - Python

Can anyone show me how i can convert all png images in my local folder to jpg images? I've tried using the following code
path1 = r'C:\Users\david.han\Desktop\COPY_images_files'
path2 = r'C:\Users\david.han\Desktop\JPG converter'
files_to_convert = (f for f in os.listdir(path1) if f.endswith(".png"))
for filename in files_to_convert:
im = Image.open(os.path.join(path1, filename))
root, _ = os.path.splitext(filename)
jpg_file = os.path.join(path2, f'{root}.jpg')
im.save(jpg_file)
I keep getting this error "OSError: cannot write mode P as JPEG"

I've decided to keep JPG but in case anyone wants to know how to change png to jpg
enter code here
from PIL import Image
import os
path = r'C:\Users\david.han\Desktop\COPY_images_files'
for file in os.listdir(path):
if file.endswith(".jpg"):
img = Image.open(file)
file_name, file_ext = os.path.splitext(file)
img.save('/png/{}.png'.format(file_name))

Correction to David's code:
from PIL import Image
import os
path = r'enter_path_to_images'
for file in os.listdir(path):
if not file.endswith(".jpg"):
img = Image.open("{path}/{file}")
file_name, file_ext = os.path.splitext(file)
img.save('/png/{}.png'.format(file_name))
In this case, we also need to add the correct path not to get any errors.

Converting all files (.jpg to .png) from a directory in Python

I'm trying to convert all files from a directory from .jpg to .png. The name should remain the same, just the format would change.
I've been doing some researches and came to this:
from PIL import Image
import os
directory = r'D:\PATH'
for filename in os.listdir(directory):
if filename.endswith(".jpg"):
im = Image.open(filename)
im.save('img11.png')
print(os.path.join(directory, filename))
continue
else:
continue
I was expecting the loop to go through all my .jpg files and convert them to .png files. So far I was doing only with 1 name: 'img11.png', I haven't succed to build something able to write the adequate names.
The print(os.path.join(directory, filename)) works, it prints all my files but concerning the converting part, it only works for 1 file.
Do you guys have any idea for helping me going through the process?

You can convert the opened image as RGB and then you can save it in any format.
You can try the following code :
from PIL import Image
import os
directory = r'D:\PATH'
c=1
for filename in os.listdir(directory):
if filename.endswith(".jpg"):
im = Image.open(filename)
name='img'+str(c)+'.png'
rgb_im = im.convert('RGB')
rgb_im.save(name)
c+=1
print(os.path.join(directory, filename))
continue
else:
continue

You're explicitly saving every file as img11.png.
You should get the name of your jpg file and then use that to name and save the png file.
name = filename[:-4]
im.save(name + '.png')

I would have used os.rename() function like below.
import os
directory = r'D:\PATH'
for filename in os.listdir(directory):
prefix = filename.split(".jpg")[0]
os.rename(filename, prefix+".png")
Please let me know if this is what you wanted. Try the code with some copied images inside a test folder, before applying to the intended folder. All the best.

from PIL import Image
import os
directory = r'D:\PATH'
for filename in os.listdir(directory):
if filename.endswith(".jpg"):
prefix = filename.split(".jpg")[0]
im = Image.open(filename)
im.save(prefix+'.png')
else:
continue
Please try this one and let me know.

i can not images using cv2.imwrite () method

I want to copy all the pictures from one folder to another folder. I tried to run this code again and again but it returns me False only instead of saving pictures to other folder.
import cv2
import glob
input_path = 'C:\\Users\\Kazmi-PC\\OneDrive\\Pictures\\1\\*.*'
output_path = 'C:\\Users\\Kazmi-PC\\OneDrive\\Pictures\\2\\*.jpg'
for file in glob.glob(input_path):
print("printing.....")
print(file)
a= cv2.imread(file)
cv2.imwrite(output_path, a)

You can't use * in output filename. You would have to use imwrite inside for loop and use unique filenames in output.
You can use shutil.copy(file, directory) to copy. So you can use output without *.jpg and you don't have to add filename in output.
But you still need to copy every file separatelly.
import glob
import shutil
input_path = 'C:\\Users\\Kazmi-PC\\OneDrive\\Pictures\\1\\*.*'
output_dir = 'C:\\Users\\Kazmi-PC\\OneDrive\\Pictures\\2\\'
for file in glob.glob(input_path):
shutil.copy(file, output_dir)

Saving images as thumbnails Python

I have this code, it origionally comes from here: renaming files base on the file structure
I added a thumbnail save as to the function from here: Create thumbnail images for jpegs with python
I'm trying to select all files from a directory structure, rename them based on the file structure. I've added a filter using 'in', but I can't get the resize as thumbnail bit to work.
Name Image is not defined.
import os
import shutil
#testing
import sys
import image
def image_thumb_filter():
size = 128, 128
for path, dirs, files in os.walk(wd):
for file in files:
if file.endswith(".jpg"):
src = os.path.join(path, file)
#print(src)
dst = os.path.join(os.getcwd(), "Photo_selection")
if not os.path.exists(dst): #Checks 'Photos_mirror' folder exists
otherwise creates
os.makedirs(dst)
new_name = src.replace(wd+'\\', '').replace('\\', '_')
new_dst = os.path.join(dst, new_name + "_thumb")
if not os.path.isfile(new_dst):
if "99\\526" in src:
try:
im = image.open(src)
im.thumbnail(size)
im.save(new_dst, "JPEG")
except IOError:
print ("cannot create thumbnail for", infile)
shutil.copy(src, dst)
old_dst = os.path.join(dst, file)
#Assuming your /dir/dir/... structure is inside of your working
directory (wd)
os.rename(old_dst, new_dst)
else: # it doesn't like this else statement
continue
image_thumb_filter()

You have not defined the object "Image" specifically anywhere in your code. Remember that Python and many other languages are case sensitive. Maybe you meant "image?"

Python 3 - Deleting pictures from a folder that are under 1920x1080

I am using a subreddit scraper to download images from wallpaper subreddits. The problem I am having is that some images have a small resolution causing them to look awful when used as wallpapers. I have found that the minimum resolution needed for a good looking wallpaper is 1920x1080. I now need to make a constantly running script that scans the image folder, looks at each images resolution and decides whether to delete it or move on to the next image. I've been tinkering about in Python for an hour or so but feel I am going nowhere fast as I am only a beginner and have not used Python for a few months. Any help on this project would be awesome ;)! Cheers.
UPDATE: I am now stuck on how to get the program to run through a folder and look at each picture. Currently my code is;
import os
from PIL import Image
while True:
for file in os.listdir(r"C:\\Users\\Barney\\Documents\\sam"):
im = Image.open(file)
x, y = im.size
totalsize = x*y
if totalsize < 2073600:
os.remove(file)
But this returns the error;
Traceback (most recent call last):
File "C:\Users\Barney\Desktop\imagefilter.py", line 7, in <module>
im = Image.open(file)
File "C:\Python34\lib\site-packages\PIL\Image.py", line 2251, in open
fp = builtins.open(fp, "rb")
FileNotFoundError: [Errno 2] No such file or directory: 'Car - 1971 Ford Mustang Mach 1 351 [2560X1600].jpg'
Looking on the internet I see that there may be a problem from where I am opening the program?? Very confused as the program is looking into this folder and reading the contents as the file it says doesnt exist is in that folder? Any help?

You can use Pillow or PIL:
from PIL import Image
with Image.open(image_file_path) as im:
x, y = im.size
if x < 1920 or y < 1080:
....
UPDATE
os.listdir returns a list of filenames, not a list of filepaths. Unless you run the program in the image directory, it cannot open the file.
Run your program in the image directory, or convert the filenames to filepaths so they can be accessed.
import os
from PIL import Image
img_dir = r"C:\Users\Barney\Documents\sam"
for filename in os.listdir(img_dir):
filepath = os.path.join(img_dir, filename)
with Image.open(filepath) as im:
x, y = im.size
totalsize = x*y
if totalsize < 2073600:
os.remove(filepath)

If you have many subfolders under a main folder you can use the following code:
[for directory_path in glob.glob(r'F:\Data\Main_folder\*'):
print(directory_path)
for filename in os.listdir(directory_path):
filepath = os.path.join(directory_path, filename)
print(filepath)
with Image.open(filepath) as im:
x, y = im.size
totalsize = x*y
if totalsize < 50176:
os.remove(filepath)][1]