From b6c5067f638979a4820893fe63dcdc47b48cf221 Mon Sep 17 00:00:00 2001
From: Otmane Lahlou <otmane.lahlou@c-s.fr>
Date: Thu, 21 Feb 2013 17:59:00 +0100
Subject: [PATCH] ENH: implement the quicklook virtual_buildModel : write the
ql to disk if multi-res or shrink the input image if not
---
Code/Common/mvdQuicklookModel.cxx | 65 ++++++++++++++++++++-----------
1 file changed, 42 insertions(+), 23 deletions(-)
diff --git a/Code/Common/mvdQuicklookModel.cxx b/Code/Common/mvdQuicklookModel.cxx
index 67a924a907..84e4c46201 100644
--- a/Code/Common/mvdQuicklookModel.cxx
+++ b/Code/Common/mvdQuicklookModel.cxx
@@ -32,6 +32,10 @@
//
// ITK includes (sorted by alphabetic order)
+//
+// OTB includes (sorted by alphabetic order)
+#include "otbStreamingShrinkImageFilter.h"
+
//
// Monteverdi includes (sorted by alphabetic order)
#include "mvdAlgorithm.h"
@@ -69,26 +73,15 @@ void
QuicklookModel
::virtual_BuildModel()
{
-
- std::cout << "QuicklookModel::virtual_BuildModel "<< std::endl;
- //
- // Step #1: Perform pre-process of AbstractModel::BuildModel()
- // pattern.
-
//
- // Step #2: Perform standard AbstractModel::BuildModel()
- // pattern. Call parent virtual method.
-
- // Empty step #2 in case of Quicklook model.
-
- //
- // Step #3: Post-process of the BuildModel() pattern.
+ // get the parent vector image model
VectorImageModel * viModel = qobject_cast< VectorImageModel* >( parent() );
- // if multi-resolution file
+ //
+ // if multi-resolution file : write the decompressed resolution to
+ // the disk and reload it via VectorImage::SetFilename(....)
if ( viModel->GetNbLod() > 1 )
{
- std::cout <<"QuicklookModel::virtual_BuildModel -> multi-res file " << std::endl;
// get the filename and use it to compose the quicklook filename
std::string fnameNoExt = itksys::SystemTools::GetFilenameWithoutExtension(
viModel->GetFilename().toStdString() );
@@ -108,20 +101,46 @@ QuicklookModel
writer->SetInput(viModel->ToImage());
writer->Update();
}
- else
- {
- std::cout <<"file "<< qlfname.str() << " exists on disk" << std::endl;
- }
// reload the quicklook
QString qlname(qlfname.str().c_str());
SetFilename(qlname, 512, 512);
}
- else
+ else // if not multi-res, shrink the native image
{
- std::cout <<"QuicklookModel::virtual_BuildModel -> NO multires file " << std::endl;
- //TODO: shrink to get a quicklook
- SetFilename( viModel->GetFilename(), 512, 512 );
+ double factorX = 1.;
+ double factorY = 1.;
+
+ // Compute the shrink factor to have 512,512 quicklook size
+ SizeType largestSize = GetNativeLargestRegion().GetSize();
+
+ if (largestSize[0] > 512) factorX = largestSize[0]/512;
+ if (largestSize[1] > 512) factorY = largestSize[1]/512;
+
+ double factor = std::max(factorX, factorY);
+
+ // if the image dimensions are lower than 512 in each dimension,
+ // no need to shrink
+ if (factor - 1.0 < 0.000000001)
+ {
+ m_Image = viModel->ToImage();
+ }
+ else
+ {
+ // shrink to get a quicklook
+ typedef otb::StreamingShrinkImageFilter<SourceImageType,
+ SourceImageType> ShrinkFilterType;
+
+ ShrinkFilterType::Pointer shrinker = ShrinkFilterType::New();
+ shrinker->SetInput(viModel->ToImage());
+ shrinker->SetShrinkFactor(factor);
+ shrinker->Update();
+
+ m_Image = shrinker->GetOutput();
+ }
+
+ // Remember native largest region.
+ m_NativeLargestRegion = m_Image->GetLargestPossibleRegion();
}
// Initialize RgbaImageModel.
--
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