Get Image Compression

[jstark]

I am loading a tiff from my hard drive into the Imaging object. I need to find out what compression was used to save the image. Is there a property for this infomation?

[Loïc]

A solution consist to retrieve the Compression tag of the native image:

Code: Select all

Imaging1.DisableGdimgplugCodecs (True)
Imaging1.CreateImageFromFile ("image.tif")

For i = 1 To Imaging1.ExifTagCount
    If Imaging1.ExifTagGetID(i) = Tags.TagCompression Then
       Select Case Trim(Imaging1.ExifTagGetValueString(i))
              Case "1"
                   MsgBox "No compression"
              Case "3"
                   MsgBox "CCITT3"
              Case "4"
                   MsgBox "CCITT4"
              Case "5"
                   MsgBox "LZW"
              Case "32773"
                   MsgBox "RLE"
              Case Else
                   MsgBox "Unknown " & Imaging1.ExifTagGetValueString(i)
       End Select
    End If
Next i

Best regards,

Loïc