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photo_tom  
#1 Posted : Friday, March 19, 2004 8:58:00 PM(UTC)
photo_tom

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The following code is giving me an invalid cast error message
Code:
                Dim hist(255) As Long
                hist = gm.Data.GetHistogram(GraphicsMill.Channel.ChannelAll)
All I'm trying to do is get the histogram. The GM object has been used for other funcitons to this point, so I know it is okay. Also
Code:
       Dim hist() As Long
       hist = gm.Data.GetHistogram(GraphicsMill.Channel.ChannelAll)
gives me the same message

Edited by user Monday, December 24, 2007 6:08:52 PM(UTC)  | Reason: Not specified

Tom Thorp Still waters, great photos
Andrew  
#2 Posted : Sunday, March 21, 2004 12:59:00 PM(UTC)
Andrew

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Histogram is returned as an array of VARIANTs (to be able to work with it in ASP). That's why you should try to declare an non-typed array (or array of objects): Dim hist(255) hist = objBitmap.Data.GetHistogram(GraphicsMill.Channel.ChannelAll)
photo_tom  
#3 Posted : Sunday, March 21, 2004 7:09:00 PM(UTC)
photo_tom

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It works. Thanks The only problem is that this generates some "untyped" code which is a little bit against how things are suppose to work in .NET. Also, because it is "untyped", it runs some slower.
Tom Thorp Still waters, great photos
Andrew  
#4 Posted : Monday, March 22, 2004 12:53:00 PM(UTC)
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Unfortunately untyped array is unavoidable in this situation. However if you use histograms array heavily, and it adversely affect the performance, you can copy this array into array of Long. Something like this:
Code:
Dim hist(255)
hist = objBitmap.Data.GetHistogram(Aurigma.GraphicsMill.Channel.ChannelAll)

Dim histLong(255) As Long
Dim I As Long
For I = LBound(hist) To UBound(hist)
    histLong(I) = hist(I)
Next I
It should not give big overhead, especially if you access this array many times. But of course, if you need to fulfill single pass through its items, it makes no sense.

Edited by user Monday, December 24, 2007 6:09:04 PM(UTC)  | Reason: Not specified

Fedor  
#5 Posted : Sunday, January 02, 2005 9:52:00 PM(UTC)
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Now you can use Graphics Mill for .NET, which is native .NET component.
Best regards, Fedor Skvortsov
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