multipage tiff with image rotation problem

[steves]

Hi Loic,

Got a strange problem for you.

im using the code below to save out a multipage tif to seperate files using the following code.

Code: Select all

        nImageID = image.CreateGdPictureImageFromFile("")
        For i As Integer = 1 To image.TiffGetPageCount(nImageID)
            image.TiffSelectPage(nImageID, i)
            image.SaveAsTIFF(nImageID, "c:\page" & Str(i) & ".tif", GdPicture.TiffCompression.TiffCompressionCCITT4)
        Next i
        image.ReleaseGdPictureImage(nImageID)

This works correctly get all 3 pages as seperate files however i need to rotate the image first before saving so i use the following code

Code: Select all

        nImageID = image.CreateGdPictureImageFromFile("")
        For i As Integer = 1 To image.TiffGetPageCount(nImageID)
            image.TiffSelectPage(nImageID, i)
                 If i = 1 Then
                      image.Rotate(nImageID, Drawing.RotateFlipType.Rotate90FlipNone)
                End If
            image.SaveAsTIFF(nImageID, "c:\page" & Str(i) & ".tif", GdPicture.TiffCompression.TiffCompressionCCITT4)
        Next i
        image.ReleaseGdPictureImage(nImageID)

I would expect this code to load the image select the first page,rotate the image 90 and save the page.
Yes this works for the 1st page but when i select the next page it skips the rotation as expected and saves page 2,but page 2 it saves it page 1.
And this continues to i have 5 pages of page 1 even though i am moving to the next page each time

Im confused to why this is happeneing maybe you can shed some light on this.

Thanks
Steve

[steves]

Further to my post above as soon as i rotate the image i get retuned Object.UnsupportedImageFormat{22} even though the image is ok when not rotated.

Also have the same problem when trying to deskew the image as well same error code returned Object.UnsupportedImageFormat{22}.

Looks like something strange is happeneing during the image processing and the image is no longer being recognised as a multipage tiff

Thanks
Steve

[steves]

Cant draw a rectangle on the image either same problem as above.

Thanks
Steve

[Loïc]

Steve, you need to open the multipage tiff for read & write before creating the GdPicture image:

Code: Select all

image.TiffOpenMultiPageForWrite(True)

Kind regards,

Loïc

[steves]

How Embarrasing

Thats solved it.Thanks Loic

Cheers
steve

[Loïc]

You are Welcome Steve