PCL: ViewToImage or ImageFromView method?

[NKV]

Hi,
For example: I want to take image from some View and converted it to UInt16Image.
I can do it via:

Code: [Select]

UInt16Image image; // target

ImageVariant v = view.Window().MainView().Image(); // source

if ( v.IsComplexSample() )throw Error( "Complex images not supported" );

AbstractImage* i = v.AnyImage();

if ( v.IsFloatSample() ) switch ( v.BitsPerSample() )
{
case 32 : image.Assign( *static_cast<Image*>( i ) ); break;
case 64 : image.Assign( *static_cast<DImage*>( i ) ); break;
}
else switch ( v.BitsPerSample() )
{
case  8 : image.Assign( *static_cast<UInt8Image*>( i ) ); break;
case 16 : image.Assign( *static_cast<UInt16Image*>( i ) ); break;
case 32 : image.Assign( *static_cast<UInt32Image*>( i ) ); break;
}

Please answer: Is it best method or there are more easy way?

Best regards,
Nikolay.

[Juan Conejero]

Yes, there's a much better way to do this with just four lines of code:

Code: [Select]

ImageVariant v;
v.CreateUIntImage( 16 );
v.CopyImage( view.Window().MainView().Image() );
UInt16Image& image = *static_cast<UInt16Image*>( v.AnyImage() );


Important: Note that, as a result of invoking a CreateXXXImage() member function, ImageVariant owns the image it transports. So you don't have to care about releasing or deallocating the image; it will be destroyed automatically as soon as v gets out of scope.

Important_1: We say that "ImageVariant owns" because this class implements class ownership. Contrarily to object ownership, which means that a particular instance of a class owns some data, an image owned by ImageVariant will be destroyed when no ImageVariant instance references it. For example:

ImageVariant f()
{
   ImageVariant a;
   a.CreateImage();
   ImageVariant b( a );
   return b;
}

ImageVariant c = f();

In this example, the image created within f() is not destroyed until c gets out of scope. This mechanism is similar to standard data sharing, but there are important differences in this implementation because ImageVariant can transport both local images (images created by your module) and shared images created by the PI Core application and accessible from your module.

[NKV]

Thank you!