How to get properties of front side and back side (TWAIN)

[irab]

Hi Loïc!

I'm using TWAIN functions to aquire pictures from a Fujitsu fi-5750C document scanner, and I have the following questions:

1. I want to save the pictures into JPG if they are coloured, and I want to save them into TIF if they are BW. (duplex mode = True)
If the front side and the back side are differents (Automatic Color Detection = True), how can I get their properties (TwainGetCurrentBitDepth, TwainGetCurrentPixelType) during scanning?
At the moment I only get the back side's propreties.

2. Is it possible to set the Automatic Color Detection = True/False (this is a VRS propertie) from a VB6 program?

Code: Select all

Imaging1.TwainSelectFeeder (True)
Imaging1.TwainEnableDuplex (True)
Imaging1.TwainSetCapCurrentNumeric(ICAP_ORIENTATION, Imaging1.TwainGetCapItemType(ICAP_ORIENTATION), 3)
Imaging1.TwainSetCurrentPixelType(2)
Imaging1.TwainSetCurrentResolution (300)

Do While Imaging1.CreateImageFromTwain(Me.hwnd) <> 0
            Debug.Print Imaging1.TwainGetCurrentBitDepth
            Debug.Print Imaging1.TwainGetCurrentPixelType
            '.......
Loop


Thank you in advance.

Best regards
Irab

[Loïc]

Hi Irab,

Just use the GetPixelDepth() function after CreateImageFromTwain().

If the returned value is 1: Save as tiff, Else save as JPEG


For your color detection issue, I suggest you to ask to Kofax the cap value used to control this capability. Then, you will be able to manage it using the TwainSetCapCurrentNumeric function.

With best regards,

Loïc