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#1 Posted : Monday, July 23, 2007 6:22:53 PM(UTC)
yymmartin

Groups: Registered
Posts: 2


Hi:

I want do a conversion.

Original image with attributes:

     Bits Allocated: 16

     Bits Stored: 16

    High Bit: 15

    signed 

I want the image result with attributes:

    Bits Allocated: 16

     Bits Stored: 12

    High Bit: 11

     unsigned 

How Can I do?

I am a Chinese,I am not sure You Can see me inextenso,But I really want Your Help.

Thanks

 

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#2 Posted : Wednesday, July 25, 2007 7:21:03 AM(UTC)

GregR  
GregR

Groups: Registered, Tech Support, Administrators
Posts: 766


I would try using L_ColorResBitmap to convert the image to 12bpp.  After that you will probably need to call L_GetMinMaxBits and then update your tags (bits allocated, stored, etc.) accordingly.

As for going from signed to unsigned, use the function L_ConvertBitmapSignedToUnsigned.

These functions are from the API, but there should be equivalents in whatever interface you're using.
 
#3 Posted : Wednesday, July 25, 2007 6:53:49 PM(UTC)
yymmartin

Groups: Registered
Posts: 2


     I using  LEADTOOLS Visual Component  library(VCL) and  LEADTOOLS DICOM VCL.

Can you  do this conversion for me?   post  the code here. I think that is perfection.

 then source file is attached.

 thanks again.

File Attachment(s):
Slices.2.rar (145kb) downloaded 25 time(s).
 
#4 Posted : Friday, July 27, 2007 6:55:41 AM(UTC)

Travis  
Travis

Groups: Registered, Tech Support
Posts: 207

Was thanked: 3 time(s) in 3 post(s)

What you're trying to do cannot be done.  The image you have provided has a Minimum Value of -3023 and a Maximum Value of 1418.  Meaning it contains 4441 values.  It would take 2^13 bits per pixel to display this many values as 2^12 would only allow 4096 values.

An option you could use though would be the RemapIntensity to map the values from 2^13 to 2^12.  I would recommend using this function.

Travis Montgomery
Senior Sales Engineer
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