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ColorizationFilter.cpp
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ColorizationFilter.cpp
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/******************************************************************************
* Copyright (c) 2012, Howard Butler, hobu.inc@gmail.com
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following
* conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided
* with the distribution.
* * Neither the name of Hobu, Inc. or Flaxen Geo Consulting nor the
* names of its contributors may be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
****************************************************************************/
#include "ColorizationFilter.hpp"
#include <pdal/PointView.hpp>
#include <pdal/util/ProgramArgs.hpp>
#include <gdal.h>
#include <ogr_spatialref.h>
#include <array>
namespace pdal
{
static StaticPluginInfo const s_info
{
"filters.colorization",
"Fetch and assign RGB color information from a GDAL-readable datasource.",
"http://pdal.io/stages/filters.colorization.html"
};
CREATE_STATIC_STAGE(ColorizationFilter, s_info)
std::string ColorizationFilter::getName() const { return s_info.name; }
namespace
{
// Parse dimension name:band number:scale factor
// Unsupplied band numbers start at 1. The default scale factor is 1.0
//
ColorizationFilter::BandInfo parseDim(const std::string& dim,
uint32_t defaultBand)
{
std::string::size_type pos, count;
const char *start;
char *end;
std::string name;
uint32_t band = defaultBand;
double scale = 1.0;
pos = 0;
// Skip leading whitespace.
count = Utils::extractSpaces(dim, pos);
pos += count;
count = Dimension::extractName(dim, pos);
if (count == 0)
throw std::string("No dimension name provided.");
name = dim.substr(pos, count);
pos += count;
count = Utils::extractSpaces(dim, pos);
pos += count;
if (pos < dim.size() && dim[pos] == ':')
{
pos++;
start = dim.data() + pos;
band = std::strtoul(start, &end, 10);
if (start == end)
band = defaultBand;
if (band == 0)
throw std::string("Invalid band number 0. Bands start at 1.");
pos += (end - start);
count = Utils::extractSpaces(dim, pos);
pos += count;
if (pos < dim.size() && dim[pos] == ':')
{
pos++;
start = dim.data() + pos;
scale = std::strtod(start, &end);
if (start == end)
scale = 1.0;
pos += (end - start);
}
}
count = Utils::extractSpaces(dim, pos);
pos += count;
if (pos != dim.size())
{
std::ostringstream oss;
oss << "Invalid character '" << dim[pos] <<
"' following dimension specification.";
throw oss.str();
}
return ColorizationFilter::BandInfo(name, band, scale);
}
} // unnamed namespace
ColorizationFilter::ColorizationFilter()
{}
ColorizationFilter::~ColorizationFilter()
{}
void ColorizationFilter::addArgs(ProgramArgs& args)
{
args.add("raster", "Raster filename", m_rasterFilename);
args.add("dimensions", "Dimensions to use for colorization", m_dimSpec);
}
void ColorizationFilter::initialize()
{
gdal::registerDrivers();
m_raster.reset(new gdal::Raster(m_rasterFilename));
auto bandTypes = m_raster->getPDALDimensionTypes();
m_raster->close();
if (m_dimSpec.empty())
m_dimSpec = { "Red", "Green", "Blue" };
uint32_t defaultBand = 1;
for (std::string& dim : m_dimSpec)
{
try
{
BandInfo bi = parseDim(dim, defaultBand);
defaultBand = bi.m_band + 1;
// Band types are 0 offset but band numbers are 1 offset.
if (bi.m_band <= bandTypes.size())
bi.m_type = bandTypes[bi.m_band - 1];
m_bands.push_back(bi);
}
catch(const std::string& what)
{
throwError("invalid --dimensions option: '" + dim + "': " + what);
}
}
}
void ColorizationFilter::addDimensions(PointLayoutPtr layout)
{
for (auto& band : m_bands)
band.m_dim = layout->registerOrAssignDim(band.m_name, band.m_type);
}
void ColorizationFilter::ready(PointTableRef table)
{
using namespace gdal;
m_raster.reset(new gdal::Raster(m_rasterFilename));
GDALError error = m_raster->open();
if (error != GDALError::None)
{
if (error == GDALError::NoTransform ||
error == GDALError::NotInvertible)
{
log()->get(LogLevel::Warning) << getName() << ": " <<
m_raster->errorMsg() << std::endl;
}
else
{
throwError(m_raster->errorMsg());
}
}
}
bool ColorizationFilter::processOne(PointRef& point)
{
static std::vector<double> data;
double x = point.getFieldAs<double>(Dimension::Id::X);
double y = point.getFieldAs<double>(Dimension::Id::Y);
if (m_raster->read(x, y, data) == gdal::GDALError::None)
{
int i(0);
for (auto bi = m_bands.begin(); bi != m_bands.end(); ++bi)
{
BandInfo& b = *bi;
point.setField(b.m_dim, data[i] * b.m_scale);
++i;
}
return true;
}
return false;
}
void ColorizationFilter::filter(PointView& view)
{
PointRef point = view.point(0);
for (PointId idx = 0; idx < view.size(); ++idx)
{
point.setPointId(idx);
processOne(point);
}
}
} // namespace pdal