IsBlank function returns TRUE for non blank images.

[britnis]

Hello Loic,

We are facing an issue with the Imaging object of the Gd Picture Pro version 5.12.4.

The function call Imaging1.IsBlank() / Imaging1.IsBlank(99) / Imaging1.IsBlank(98) returns TRUE though the image being scanned has reasonable amount of print on it.

This function Imaging1.IsBlank() returns TRUE for non-blank images when scanned through on the HP LaserJet 3055 All in one scanner.

Could you guide me through this issue. I have added a sample code below:

Code: Select all

    While Imaging1.CreateImageFromTwain(UserControl.hWnd) <> 0
        lImageID = Imaging1.GetNativeImage
        Dim checkBlankfromGDPRO, consolidatedCheck As Boolean
        checkBlankfromGDPRO = Imaging1.IsBlank()
        If consolidatedCheck Then
                 lOgdImgId = Imaging1.closeImage(lImageID)
        Else
             SAVE THE IMAGE TO THE TEMP FOLDER.......
        Endif
    Wend

Regards,
Nirmal Lawrence

[Loïc]

Hi,

Could you attach the image on which the engine fails ?

Kind regards,

Loïc

[britnis]

Thanks for the quick response, Loic.

I am attaching a copy of the image that is returning TRUE on the IsBlank call when scanning on a HP Scanjet 3055 All In One scanner.

Below is the other options used before performing the scan process:

Code: Select all

Imaging1.TwainSetCurrentResolution (75)
Imaging1.TwainSetCurrentPixelType (TWPT_GRAY)
Imaging1.TwainSetCurrentBitDepth (1)

The requirement is that, images with an affixed photo should be scanned with good clarity and a lesser file size. The output should have a decent clarity on the photo.

Note: The IsBlank function returns FALSE [as expected] with the same image on the same scanner when scanned using Imaging1.TwainSetCurrentResolution (150).

I look forward to your response.

Regards,
Nirmal Lawrence

[britnis]

Hello Loic,

Any updates on this issue?

Regards.

[Loïc]

Hi there,

Using the last version the IsBlank method returns FALSE on your image (which is correct). Could you try it ?

Kind regards,

Loïc