Issue
I have an image processing problem and 100 image dataset. now im trying to reduce the image pixel size , that means converting the larger images to smaller image pixel size(not cropping). Im already trying some python code , but thats cropping the image Is there any python tool or method to reduce the image pixel size.
Solution
import PIL # if I remember correctly, this is not a standard library
for i, imagePath in enumerate(imagePaths):
try:
img = PIL.Image.open(imagePath, mode='r')
except ValueError, FileNotFoundError, PIL.UnidentifiedImageError:
print(f"Could not process image n°{i}. Skipping")
continue
img.resize((newWidth, newHeight), PIL.Image.ANTIALIAS)
img.save(f"new_img/resized_nb_{i}")
Should do the trick.
Now of course, if you don't want to use PIL, and your new size is a divider of the old one (for example (100 x 200) -> (10, 20)), you can always do some horrendious inline array computation :
img : np.ndarray # we will use a numpy array here, so long as you can __getitem__ a pixel, it should work.
newImg = np.array([
[
img[ x*int(oldSizeX/newSizeX), y*int(oldSizeY/newSizeY) ]
for x in range newSizeX
]
for y in range newSizeY
])
where you simply go and fetch the pixels you need and put them in your new array.
Answered By - Alex SHP
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