# Vision utils
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source
### download_images
``` python
def download_images(
dest, url_file:NoneType=None, urls:NoneType=None, max_pics:int=1000, n_workers:int=8, timeout:int=4,
preserve_filename:bool=False
):
```
*Download images listed in text file `url_file` to path `dest`, at most
`max_pics`*
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source
### resize_to
``` python
def resize_to(
img, targ_sz, use_min:bool=False
):
```
*Size to resize to, to hit `targ_sz` at same aspect ratio, in PIL coords
(i.e w*h)\*
``` python
class _FakeImg():
def __init__(self, size): self.size=size
img = _FakeImg((200,500))
test_eq(resize_to(img, 400), [160,400])
test_eq(resize_to(img, 400, use_min=True), [400,1000])
```
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source
### verify_image
``` python
def verify_image(
fn
):
```
*Confirm that `fn` can be opened*
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source
### verify_images
``` python
def verify_images(
fns
):
```
*Find images in `fns` that can’t be opened*
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### resize_image
``` python
def resize_image(
file, dest, src:str='.', max_size:NoneType=None, n_channels:int=3, ext:NoneType=None, img_format:NoneType=None,
resample:Resampling=