janus.cpp
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#include "janus.h"
#include "janus_io.h"
#include "openbr_plugin.h"
using namespace br;
static QSharedPointer<Transform> transform;
static QSharedPointer<Distance> distance;
size_t janus_max_template_size()
{
return 33554432; // 32 MB
}
janus_error janus_initialize(const char *sdk_path, const char *model_file)
{
int argc = 1;
const char *argv[1] = { "janus" };
Context::initialize(argc, (char**)argv, sdk_path, false);
Globals->quiet = true;
const QString algorithm = model_file;
if (algorithm.isEmpty()) {
transform.reset(Transform::make("Cvt(Gray)+Affine(88,88,0.25,0.35)+<FaceRecognitionExtraction>+<FaceRecognitionEmbedding>+<FaceRecognitionQuantization>", NULL));
distance = Distance::fromAlgorithm("FaceRecognition");
} else {
transform.reset(Transform::make(algorithm + "Enroll", NULL));
distance.reset(Distance::make(algorithm + "Compare", NULL));
}
return JANUS_SUCCESS;
}
janus_error janus_finalize()
{
transform.reset();
distance.reset();
Context::finalize();
return JANUS_SUCCESS;
}
struct janus_template_type : public Template
{};
janus_error janus_initialize_template(janus_template *template_)
{
*template_ = new janus_template_type();
return JANUS_SUCCESS;
}
janus_error janus_augment(const janus_image image, const janus_attribute_list attributes, janus_template template_)
{
Template t;
t.append(cv::Mat(image.height,
image.width,
image.color_space == JANUS_GRAY8 ? CV_8UC1 : CV_8UC3,
image.data));
for (size_t i=0; i<attributes.size; i++)
t.file.set(janus_attribute_to_string(attributes.attributes[i]), attributes.values[i]);
if (!t.file.contains("RIGHT_EYE_X") ||
!t.file.contains("RIGHT_EYE_Y") ||
!t.file.contains("LEFT_EYE_X") ||
!t.file.contains("LEFT_EYE_Y"))
return JANUS_MISSING_ATTRIBUTES;
t.file.set("Affine_0", QPointF(t.file.get<float>("RIGHT_EYE_X"), t.file.get<float>("RIGHT_EYE_Y")));
t.file.set("Affine_1", QPointF(t.file.get<float>("LEFT_EYE_X"), t.file.get<float>("LEFT_EYE_Y")));
Template u;
transform->project(t, u);
template_->append(u);
return (u.isEmpty() || !u.first().data) ? JANUS_FAILURE_TO_ENROLL : JANUS_SUCCESS;
}
janus_error janus_finalize_template(janus_template template_, janus_flat_template flat_template, size_t *bytes)
{
*bytes = 0;
foreach (const cv::Mat &m, *template_) {
if (!m.data)
continue;
if (!m.isContinuous())
return JANUS_UNKNOWN_ERROR;
const size_t templateBytes = m.rows * m.cols * m.elemSize();
if (*bytes + sizeof(size_t) + templateBytes > janus_max_template_size())
break;
memcpy(flat_template, &templateBytes, sizeof(templateBytes));
flat_template += sizeof(templateBytes);
*bytes += sizeof(templateBytes);
memcpy(flat_template, m.data, templateBytes);
flat_template += templateBytes;
*bytes += templateBytes;
}
delete template_;
return JANUS_SUCCESS;
}
janus_error janus_verify(const janus_flat_template a, const size_t a_bytes, const janus_flat_template b, const size_t b_bytes, float *similarity)
{
*similarity = 0;
int comparisons = 0;
janus_flat_template a_template = a;
while (a_template < a + a_bytes) {
const size_t a_template_bytes = *reinterpret_cast<size_t*>(a_template);
a_template += sizeof(a_template_bytes);
janus_flat_template b_template = b;
while (b_template < b + b_bytes) {
const size_t b_template_bytes = *reinterpret_cast<size_t*>(b_template);
b_template += sizeof(b_template_bytes);
*similarity += distance->compare(cv::Mat(1, a_template_bytes, CV_8UC1, a_template),
cv::Mat(1, b_template_bytes, CV_8UC1, b_template));
comparisons++;
b_template += b_template_bytes;
}
a_template += a_template_bytes;
}
if (*similarity != *similarity) // True for NaN
return JANUS_UNKNOWN_ERROR;
if (comparisons > 0) *similarity /= comparisons;
else *similarity = -std::numeric_limits<float>::max();
return JANUS_SUCCESS;
}
janus_error janus_enroll(const janus_template template_, const janus_template_id template_id, janus_gallery gallery)
{
template_->file.set("TEMPLATE_ID", template_id);
QFile file(gallery);
if (!file.open(QFile::WriteOnly | QFile::Append))
return JANUS_WRITE_ERROR;
QDataStream stream(&file);
stream << *template_;
file.close();
delete template_;
return JANUS_SUCCESS;
}
janus_error janus_gallery_size(janus_gallery gallery, size_t *size)
{
*size = TemplateList::fromGallery(gallery).size();
return JANUS_SUCCESS;
}
janus_error janus_compare(janus_gallery target, janus_gallery query, float *similarity_matrix, janus_template_id *target_ids, janus_template_id *query_ids)
{
const TemplateList targets = TemplateList::fromGallery(target);
const TemplateList queries = TemplateList::fromGallery(query);
QScopedPointer<MatrixOutput> matrix(MatrixOutput::make(targets.files(), queries.files()));
distance->compare(targets, queries, matrix.data());
const QVector<janus_template_id> targetIds = File::get<janus_template_id,File>(matrix->targetFiles, "TEMPLATE_ID").toVector();
const QVector<janus_template_id> queryIds = File::get<janus_template_id,File>(matrix->queryFiles, "TEMPLATE_ID").toVector();
memcpy(similarity_matrix, matrix->data.data, matrix->data.rows * matrix->data.cols * sizeof(float));
memcpy(target_ids, targetIds.data(), targetIds.size() * sizeof(janus_template_id));
memcpy(query_ids, queryIds.data(), queryIds.size() * sizeof(janus_template_id));
return JANUS_SUCCESS;
}