27 #include "boost/math/constants/constants.hpp"
40 FlagDefinitionList flagDefinitions;
45 flagDefinitions.add(
"flag_noCentroid",
"Object has no centroid");
47 flagDefinitions.add(
"flag_noShape",
"Object has no shape");
55 if (!childFootprint) {
60 childHeavy = std::dynamic_pointer_cast<afw::detection::HeavyFootprint<float>
const>(childFootprint);
74 typedef ndarray::Array<float const, 1, 1>::Iterator ChildPixIter;
75 auto spanIter = childHeavy->getSpans()->begin();
76 auto const spanEnd = childHeavy->getSpans()->end();
77 ChildPixIter childPixIter = childHeavy->getImageArray().begin();
80 while (spanIter != spanEnd) {
81 afw::geom::Span
const& span = *spanIter;
82 ParentPixIter parentPixIter =
83 parentImage.
x_at(span.getBeginX() - parentImage.
getX0(), span.getY() - parentImage.
getY0());
84 int const width = span.getWidth();
86 for (
int x = 0;
x < width; ++parentPixIter, ++childPixIter, ++
x) {
87 cp += (*childPixIter) * ((*parentPixIter) - (*childPixIter));
88 cc += (*childPixIter) * (*childPixIter);
98 class FluxAccumulator {
100 FluxAccumulator() :
_w(0.0),
_ww(0.0),
_wd(0.0) {}
102 void operator()(
double,
double,
float weight,
float data) {
104 _ww += weight * weight;
108 double getFlux()
const {
return _w *
_wd /
_ww; }
116 class ShapeAccumulator :
public FluxAccumulator {
118 ShapeAccumulator() : FluxAccumulator(), _wdxx(0.0), _wdyy(0.0), _wdxy(0.0) {}
120 void operator()(
double x,
double y,
float weight,
float data) {
121 FluxAccumulator::operator()(x, y, weight, data);
122 _wdxx +=
x *
x * weight *
data;
123 _wdyy +=
y *
y * weight *
data;
124 _wdxy +=
x *
y * weight *
data;
127 ShapeResult getShape()
const {
143 template <
typename Accumulator>
144 void computeMoments(afw::image::MaskedImage<float>
const& image,
geom::Point2D const& centroid,
145 afw::geom::ellipses::Quadrupole
const& shape,
double nSigmaWeightMax,
146 Accumulator& accumulatorRaw, Accumulator& accumulatorAbs) {
149 afw::geom::ellipses::Ellipse ellipse(shape, centroid);
150 ellipse.getCore().scale(nSigmaWeightMax);
155 geom::LinearTransform
transform = shape.getGridTransform();
161 afw::geom::ellipses::PixelRegion region(ellipse);
162 bool isContained =
bbox.contains(region.getBBox());
163 SpanIter
const spanEnd = region.end();
164 for (SpanIter spanIter = region.begin(); spanIter != spanEnd; ++spanIter) {
165 afw::geom::Span span = *spanIter;
167 if (span.getY() <
bbox.getMinY() || span.getY() >
bbox.getMaxY()) {
170 span = afw::geom::Span(span.getY(),
std::max(span.getMinX(),
bbox.getMinX()),
172 if (span.getMinX() > span.getMaxX()) {
176 PixelIter pixelIter =
image.x_at(span.getBeginX() -
image.getX0(), span.getY() -
image.getY0());
177 PointIter
const pointEnd = span.end();
178 for (PointIter pointIter = span.begin(); pointIter != pointEnd; ++pointIter, ++pixelIter) {
182 float weight =
std::exp(
static_cast<float>(-0.5 * td.computeSquaredNorm()));
183 float data = pixelIter.image();
184 accumulatorRaw(d.getX(), d.getY(), weight, data);
185 float variance = pixelIter.variance();
188 accumulatorAbs(d.getX(), d.getY(), weight, std::abs(data) - bias);
199 _old =
schema.addField<
double>(
201 "Blendedness from dot products: (child.dot(parent)/child.dot(child) - 1)");
204 _raw =
schema.addField<
double>(
206 "Measure of how much the flux is affected by neighbors: "
207 "(1 - child_instFlux/parent_instFlux). Operates on the \"raw\" pixel values.");
208 _instFluxChildRaw =
schema.addField<
double>(
210 "Instrumental flux of the child, measured with a Gaussian weight matched to the child. "
211 "Operates on the \"raw\" pixel values.",
"count");
212 _instFluxParentRaw =
schema.addField<
double>(
214 "Instrumental flux of the parent, measured with a Gaussian weight matched to the child. "
215 "Operates on the \"raw\" pixel values.",
"count");
216 _abs =
schema.addField<
double>(
218 "Measure of how much the flux is affected by neighbors: "
219 "(1 - child_instFlux/parent_instFlux). "
220 "Operates on the absolute value of the pixels to try to obtain a \"de-noised\" value. "
221 "See section 4.9.11 of Bosch et al. 2018, PASJ, 70, S5 for details.");
222 _instFluxChildAbs =
schema.addField<
double>(
224 "Instrumental flux of the child, measured with a Gaussian weight matched to the child. "
225 "Operates on the absolute value of the pixels to try to obtain a \"de-noised\" value. "
226 "See section 4.9.11 of Bosch et al. 2018, PASJ, 70, S5 for details.",
"count");
227 _instFluxParentAbs =
schema.addField<
double>(
229 "Instrumental flux of the parent, measured with a Gaussian weight matched to the child. "
230 "Operates on the absolute value of the pixels to try to obtain a \"de-noised\" value. "
231 "See section 4.9.11 of Bosch et al. 2018, PASJ, 70, S5 for details.",
"count");
236 "Shape of the child, measured with a Gaussian weight matched to the child. "
240 "Shape of the parent, measured with a Gaussian weight matched to the child. "
244 "Shape of the child, measured with a Gaussian weight matched to the child. "
245 "Operates on the absolute value of the pixels to try to obtain a \"de-noised\" value. "
246 "See section 4.9.11 of Bosch et al. 2018, PASJ, 70, S5 for details.",
250 "Shape of the parent, measured with a Gaussian weight matched to the child. "
251 "Operates on the absolute value of the pixels to try to obtain a \"de-noised\" value. "
252 "See section 4.9.11 of Bosch et al. 2018, PASJ, 70, S5 for details.",
262 if (!(normalization > 0)) {
283 if (!child.
getTable()->getCentroidKey().isValid()) {
285 "Centroid Key must be defined to measure the blendedness instFlux");
289 if (!child.
getTable()->getShapeKey().isValid()) {
291 "Shape Key must be defined to measure the blendedness shape");
296 if (child.
getTable()->getCentroidFlagKey().isValid()) {
304 if (child.
getTable()->getShapeFlagKey().isValid()) {
326 ShapeAccumulator accumulatorRaw;
327 ShapeAccumulator accumulatorAbs;
331 child.
set(instFluxRawKey, accumulatorRaw.getFlux());
332 child.
set(instFluxAbsKey,
std::max(accumulatorAbs.getFlux(), 0.0));
334 _shapeRawKey.
set(child, accumulatorRaw.getShape());
335 _shapeAbsKey.
set(child, accumulatorAbs.getShape());
336 }
else if (_ctrl.
doFlux) {
337 FluxAccumulator accumulatorRaw;
338 FluxAccumulator accumulatorAbs;
341 child.
set(instFluxRawKey, accumulatorRaw.getFlux());
342 child.
set(instFluxAbsKey,
std::max(accumulatorAbs.getFlux(), 0.0));
348 _measureMoments(
image, child, _instFluxChildRaw, _instFluxChildAbs, _shapeChildRaw, _shapeChildAbs);
356 _measureMoments(
image, child, _instFluxParentRaw, _instFluxParentAbs, _shapeParentRaw, _shapeParentAbs);
358 child.
set(_raw, 1.0 - child.
get(_instFluxChildRaw) / child.
get(_instFluxParentRaw));
359 child.
set(_abs, 1.0 - child.
get(_instFluxChildAbs) / child.
get(_instFluxParentAbs));
360 if (child.
get(_instFluxParentAbs) == 0.0) {