An image with a pixel resolution of 640 x 480 has additional dimension and resolution parameters according to
exiftool. I'm unsure what they mean.
- Why are the X / Y Resolution parameters the same?
Should they not reflect the pixel dimensions of the image?
- What does Exif Image Size mean and how is it different from the pixel dimensions?
- What is the focal plane?
Does it have any relation to the device used to capture this image?
$ exiftool evil1.jpg | egrep 'Width|Height|Resolution' X Resolution : 180 Y Resolution : 180 Resolution Unit : inches Exif Image Width : 400 Exif Image Height : 300 Focal Plane X Resolution : 8114.285714 Focal Plane Y Resolution : 8114.285714 Focal Plane Resolution Unit : inches Image Width : 640 Image Height : 480
If needed, the original image can be obtained from:
here=http://www.pythonchallenge.com/pc/return/evil1.jpg wget --user=huge --password=file $here