Convert image to 12 bits

Hi there,
I am using LEAD Tools 14.5 with Visual Basic 6.
Following are the versions of my LEAD Tools Dlls
LTDic14N.dll = 14.5.0.2
LTDic14s.dll = 14.5.0.1
LTDicDS14n.DLL = 14.5.0.2

I want to convert any non dicom image (i. e. JPEG, TIFF, BMP with any bits per pixel) to 12 bit DICOM MONOCHROME2 image.

My sample project is attached herewith for your kind perusal.

My problem is, though I am converting the image to 12 bit using Grayscale() method of LEADRasterProcess object before inserting it into DICOM Dataset, the output values (values after DICOM DS is saved on harddisk using SaveDS() method of LEAD DICOMDs) of BitsAllocated, BitsPerPixel and BitsStored are 16. And output value of HighBit is 15.

To reproduce same problem in your LEAD DICOM VB Demo :-
- Convert SourceImage.tif to DICOM using this sample
- Open Target.dic created after conversion in LEAD DICOM VB Demo application
- Open the Pixel Data element to view the image
- Observe BitsAllocated, BitsPerPixel and BitsStored values in ImageInfo. Value must be 16.
- Now under "Processing" menu, click on "Grayscale 12" submenu.
- Again observe BitsAllocated, BitsPerPixel and BitsStored values in ImageInfo. Those will be 16.

If I am converting image to 12 bits, these values should be changed accordingly. But its not happening.

Please help me out.

I am trying to upload sample code in zip file here but failed.
Following is the message displayed on screen.

"Unknown Error
We apologize, but an unknown error has occured in the forums.
This error has been logged."

Please let me know how should I upload zip file here ?

This is my sample application

Please reply

Amit,

I received your project and I am currently investigating more about this issue. I will provide you with more information very soon.

Thanks,
Maen Badwan
LEADTOOLS Technical Support

I read few more posts on this site describing same problem and your solutions for the same.
I tried all those solutions but it did not worked.

any way, as you said you are working on it.

Waiting for your reply.

Amit,

I checked your project and noticed that because you set DicomDS.EnableMethodErrors to False, your code does not detect that some function calls fail. For example, DicomDS.GetImageInformation fails, but your code continues and tries to check the members of DicomDS.ImageInfo.
I'm not sure yet where the source of the error is, so can you reproduce the problem using a smaller project that only contains the minimum needed code without having multiple subroutines calling one another?

Thanks,
Maen Badwan
LEADTOOLS Technical Support

Now I have merged InsertBitmap function in ConvertToDIC function. As you said I enabled the method errors. Updated project is attached herewith.
Now it throws an error at "DicomDS.InsertElement"
Error is General Failure.
What should I do now ?

Further, how this could affect conversion to 12 bit DIC.

My primary target is to convert image to 12 bit DICOM.

Waiting for your reply

Amit,

About the DicomDS.InsertElement issue, to resolve the problem, don't call the DicomDS.SetCurrentElement method before calling the DicomDS.InsertElement method. Please check the following code:
+------------+
If DicomDS.FindFirstElement(TAG_PIXEL_DATA, False) = DICOM_SUCCESS Then
DicomDS.DeleteElement
If DicomDS.InsertElement(True, TAG_PIXEL_DATA, VR_OB, False, 0) = DICOM_SUCCESS Then
hPixelDataElement = DicomDS.CurrentElement.hElement
End If
+------------+

Thanks,
Maen Badwan
LEADTOOLS Technical Support

Hi,
I followed the steps and the General Failure error is gone. Modified project is attached herewith.
But now the error is at "DicomDS.GetImageInformation 0" saying value is out of range.
I checked lead documentation. The parameter passed to GetImageInformation() method is index of image in pixel data element. In my case, it is zero and I passed same.

Please download and modify the same project and upload the updated one here. For my help, please put some comments in project. It will take much time if we keep playing with single error.

Hi,
I modified the project again and uploaded here for your reference.

Now EnableMethodErrors is true and there is no any error in entire application. Still, output image after conversion is 16 bit.

Please download and modify the same project and upload the updated one here. For my help, please put some comments in project.

Waiting for your reply.

Amit,

I want to investigate more about his issue. Please send an email to support@leadtools.com and include the following information in your email: Your name, Company name and LEADTOOLS serial number.

Please don't forget to mention this forum post in your email to support.

Thanks,
Maen Badwan
LEADTOOLS Technical Support

Hi Maen,
I sent the mail according to your insturctions.

I received the following :-
Ticket#: 2008121710000181

Please reply soon.

Waiting for reply,

Amit,

I will send you a reply through support email.

Thanks,
Maen Badwan
LEADTOOLS Technical Support

Thanks Maen for reply.

Will you please tell me approximately how much time it will take to resolve the issue. This will help me to schedule my project.

Also please make a post here when you send me Support eMail so that I can check it out.

Thanks again and waiting for reply.

Hi maen,
I tried your solution but it still not working.
The results of tests are as follows.
1) If I use 24 BPP image as source image, the modifications donot affect any way.
2) If I use 16 bits allocated 12 bits stored tif image (the one you attached in post 18967 on 13 Feb 2008), it shows output high bit 12 but image is totaly distorted.

I have attached my modified sample herewith.

As I have said in earlier post, please download and modify the project at your end and please upload modified project herewith for my reference. This will save your and my time.

Waiting for your reply.

I got your email
I have sent you the reply.