gm identify -verbose problem.jpg

gistfile1.txt

Image: problem.jpg
  Format: JPEG (Joint Photographic Experts Group JFIF format)
  Geometry: 698x1080
  Class: DirectClass
  Type: true color
  Depth: 8 bits-per-pixel component
  Channel Depths:
    Red:      8 bits
    Green:    8 bits
    Blue:     8 bits
  Channel Statistics:
    Red:
      Minimum:                    25.00 (0.0980)
      Maximum:                   255.00 (1.0000)
      Mean:                      158.84 (0.6229)
      Standard Deviation:         50.71 (0.1989)
    Green:
      Minimum:                    11.00 (0.0431)
      Maximum:                   255.00 (1.0000)
      Mean:                      153.06 (0.6002)
      Standard Deviation:         51.16 (0.2006)
    Blue:
      Minimum:                    24.00 (0.0941)
      Maximum:                   255.00 (1.0000)
      Mean:                      146.71 (0.5753)
      Standard Deviation:         44.02 (0.1726)
  Resolution: 96x96 pixels/inch
  Filesize: 637.3K
  Interlace: No
  Orientation: TopLeft
  Background Color: grey100
  Border Color: #DFDFDF
  Matte Color: grey74
  Dispose: Undefined
  Iterations: 0
  Compression: JPEG
  JPEG-Quality: 75
  JPEG-Colorspace: 2
  JPEG-Colorspace-Name: RGB
  JPEG-Sampling-factors: 2x2,1x1,1x1
  Signature: 3d3ede644b22789bfdfdce7066bfebd086b08ad7ae598a15ca8b616942fd9241
  Profile-color: 557168 bytes
  Profile-EXIF: 6070 bytes
    Orientation: 1
    X Resolution: 19660800/65536
    Y Resolution: 19660800/65536
    Resolution Unit: 2
    Software: Adobe Photoshop CS2 Windows
    Date Time: 2011:04:12 14:11:50
    Exif Offset: 162
    Exif Image Width: 1677
    Exif Image Length: 2592
  Tainted: False
  User Time: 0.020u
  Elapsed Time: 0:01
  Pixels Per Second: 35.9M