| T O P I C R E V I E W |
| yeohray2 |
Posted - Nov 02 2021 : 03:43:27
How can I use the Proc.Negative function to correctly invert the grayscale values for a DICOM image that has a RescaleSlope value of <> 1, and where DICOM_Range is iedrSetBlackWhite?
I'm attaching a sample project together with a sample DICOM file. The first TImageEnView control loads the image with the defaults, the second TImageEnView sets DICOM_Range to iedrSetBlackWhite.
When I call the Proc.Negative function, the first TImageEnView control inverts the colors correctly, but the second TImageEnView displays a flat white image.
Is there some other setting that needs to be set in this case?
Thanks in advance.
Ray
attach/yeohray2/202111234219_TestNegative.zip
146.82 KB |
| 4 L A T E S T R E P L I E S (Newest First) |
| yeohray2 |
Posted - Nov 07 2021 : 19:58:01
Hi Nigel, that works, thanks.
Ray |
| xequte |
Posted - Nov 03 2021 : 18:28:49
Hi
If you email me, we have an update with an "Inverted" color palette.
Nigel
Xequte Software
www.imageen.com
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| yeohray2 |
Posted - Nov 03 2021 : 03:59:56
Hi, thanks for the suggestion.
That option works, but it isn't feasible because we need to be able to identify each pixel's original HU value. Is using a color map feasible to invert the values?
Thank you. |
| xequte |
Posted - Nov 02 2021 : 22:21:30
Hi Ray
I'm out of the office today, but you should be able to call StretchValues before Negative:
https://www.imageen.com/help/TIEBitmap.StretchValues.html
e.g.
ImageEnView1.IEBitmap.StretchValues(); // Apply B+W values
ImageEnView1.Proc.Negative();
Nigel
Xequte Software
www.imageen.com
|
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