开发者

Detecting corrupted images in bash script [closed]

Closed. This question needs to be more focused. It is not currently accepting answers.

Want to improve this question? Update the question so it focuses on one problem only by editing this post.

Closed 6 years ago.

Improve this question

I have >2000 images from a webcam stream (for a time-lapse video), I need to delete all incomplete & corrupted images, before passing them to a php-gd script that edits them for the final video.

Is it possible to detect corrupted files 开发者_如何学编程with imagemagick or some other tool? If i try to open the corrupted image with feh it displays libpng error: Read Error in console

Thanks in advance!

UPDATE: It seems that the suggested identify method accepts the bad images in my case. Here is an example of a corrupted one http://imgur.com/YcB9n


Try ImageMagick's identify command. From the man page:

Identify describes the format and characteristics of one or more image files. It will also report if an image is incomplete or corrupt.

Example:

$ identify foo.png
identify: NotAPNGImageFile (foo.png).

$ echo $?
1

An alternative, is to use PIL (Python Imaging Library):

from PIL import Image

im = Image.open("foo.png")
im.verify()

From the documentation:

im.verify()

Attempts to determine if the file is broken, without actually decoding the image data. If this method finds any problems, it raises suitable exceptions. This method only works on a newly opened image; if the image has already been loaded, the result is undefined. Also, if you need to load the image after using this method, you must reopen the image file.


I tried the ImageMagick identify command on a jpg I had laying around with several kinds of corruptions thrown in. It was able to identify some, but not all, so this might just be a partial solution at best, but try this:

for f in *.JPG ; do identify $f > /dev/null || echo $f >> /tmp/fail ; done ; cat /tmp/fail
0

上一篇:

下一篇:

精彩评论

暂无评论...
验证码 换一张
取 消

最新问答

问答排行榜