ExtractSubset Class Reference

#include <extract_subset.h>

Classes
class	Settings

Static Public Member Functions
static void	createSubset (const Settings &s)

Friends
std::ostream &	operator<< (std::ostream &os, const Settings &s)

Detailed Description

Class responsible for extracting particles from metadata / stack file into a new metadata / stack file

Definition at line 42 of file extract_subset.h.

Member Function Documentation

createSubset()

void ExtractSubset::createSubset ( const Settings &  s )

static

This method will extract particles according to the passed settings. New files containing the subset shall be created.

Definition at line 29 of file extract_subset.cpp.

                                                  {
    s.check();
    auto it = s.md.ids().begin();
    // get to proper position
    for (size_t i = 0; i < s.first; ++i)
        ++it;

    auto destMD = MetaDataVec();
    auto img = Image<float>();
    // iterate through all items
    for (size_t i = 0; i < s.count; ++it, i++) {
        // orig name
        FileName origName;
        s.md.getValue(MDL_IMAGE, origName, *it);
        // new name
        FileName newName;
        newName.compose(i + 1, s.outStk); // within stk file, index images from one (1)
        // copy row, replace name
        MDRowVec row = s.md.getRowVec(*it);
        row.setValue(MDL_IMAGE, newName);
        row.setValue(MDL_ENABLED, 1);
        destMD.addRow(row);
        // copy image
        // FIXME DS maybe we can do this more efficiently
        img.read(origName);
        img.write(newName, i, true, WRITE_APPEND);
    }
    // store metadata
    destMD.write(s.outXmd);
}

Friends And Related Function Documentation

operator<<

std::ostream& operator<< ( std::ostream &  os, const Settings &  s  )

friend

Definition at line 89 of file extract_subset.cpp.

                                                                       {
    os << "Input metadata   : " << s.md.getFilename() << "\n";
    os << "Output metadata  : " << s.outXmd << "\n";
    os << "Matching items   : " << s.count << "\n";
    os << "Skip disabled    : " << (s.skipDisabled ? "yes" : "no") << "\n";
    os.flush();
    return os;
}

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The documentation for this class was generated from the following files:

• xmipp/legacy/libraries/reconstruction/extract_subset.h
• xmipp/legacy/libraries/reconstruction/extract_subset.cpp