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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2011 Blender Foundation. All rights reserved. */
#include "intern/track_region.h"
#include "intern/image.h"
#include "intern/utildefines.h"
#include "libmv/image/image.h"
#include "libmv/logging/logging.h"
#include "libmv/tracking/track_region.h"
/* define this to generate PNG images with content of search areas
tracking between which failed */
#undef DUMP_FAILURE
/* define this to generate PNG images with content of search areas
on every iteration of tracking */
#undef DUMP_ALWAYS
using libmv::FloatImage;
using libmv::TrackRegion;
using libmv::TrackRegionOptions;
using libmv::TrackRegionResult;
namespace {
TrackRegionOptions::Direction convertDirection(
libmv_TrackRegionDirection direction) {
switch (direction) {
case LIBMV_TRACK_REGION_FORWARD: return TrackRegionOptions::FORWARD;
case LIBMV_TRACK_REGION_BACKWARD: return TrackRegionOptions::BACKWARD;
}
LOG(FATAL) << "Unhandled tracking direction " << direction
<< ", should never happen.";
return TrackRegionOptions::FORWARD;
}
TrackRegionOptions::Mode convertMotionModelToMode(int motion_model) {
switch (motion_model) {
#define LIBMV_CONVERT(the_model) \
case TrackRegionOptions::the_model: return TrackRegionOptions::the_model;
LIBMV_CONVERT(TRANSLATION)
LIBMV_CONVERT(TRANSLATION_ROTATION)
LIBMV_CONVERT(TRANSLATION_SCALE)
LIBMV_CONVERT(TRANSLATION_ROTATION_SCALE)
LIBMV_CONVERT(AFFINE)
LIBMV_CONVERT(HOMOGRAPHY)
#undef LIBMV_CONVERT
}
LOG(FATAL) << "Unhandled motion model " << motion_model
<< ", should never happen.";
return TrackRegionOptions::TRANSLATION;
}
} // namespace
void libmv_configureTrackRegionOptions(
const libmv_TrackRegionOptions& options,
TrackRegionOptions* track_region_options) {
track_region_options->direction = convertDirection(options.direction);
track_region_options->mode = convertMotionModelToMode(options.motion_model);
track_region_options->minimum_correlation = options.minimum_correlation;
track_region_options->max_iterations = options.num_iterations;
track_region_options->sigma = options.sigma;
track_region_options->num_extra_points = 1;
track_region_options->image1_mask = NULL;
track_region_options->use_brute_initialization = options.use_brute;
/* TODO(keir): This will make some cases better, but may be a regression until
* the motion model is in. Since this is on trunk, enable it for now.
*
* TODO(sergey): This gives much worse results on mango footage (see 04_2e)
* so disabling for now for until proper prediction model is landed.
*
* The thing is, currently blender sends input coordinates as the guess to
* region tracker and in case of fast motion such an early out ruins the
* track.
*/
track_region_options->attempt_refine_before_brute = false;
track_region_options->use_normalized_intensities = options.use_normalization;
}
void libmv_regionTrackergetResult(const TrackRegionResult& track_region_result,
libmv_TrackRegionResult* result) {
result->termination = (int)track_region_result.termination;
result->termination_reason = "";
result->correlation = track_region_result.correlation;
}
int libmv_trackRegion(const libmv_TrackRegionOptions* options,
const float* image1,
int image1_width,
int image1_height,
const float* image2,
int image2_width,
int image2_height,
const double* x1,
const double* y1,
libmv_TrackRegionResult* /*result*/,
double* x2,
double* y2) {
double xx1[5], yy1[5];
double xx2[5], yy2[5];
bool tracking_result = false;
// Convert to doubles for the libmv api. The four corners and the center.
for (int i = 0; i < 5; ++i) {
xx1[i] = x1[i];
yy1[i] = y1[i];
xx2[i] = x2[i];
yy2[i] = y2[i];
}
TrackRegionOptions track_region_options;
FloatImage image1_mask;
libmv_configureTrackRegionOptions(*options, &track_region_options);
if (options->image1_mask) {
libmv_floatBufferToFloatImage(
options->image1_mask, image1_width, image1_height, 1, &image1_mask);
track_region_options.image1_mask = &image1_mask;
}
// Convert from raw float buffers to libmv's FloatImage.
FloatImage old_patch, new_patch;
libmv_floatBufferToFloatImage(
image1, image1_width, image1_height, 1, &old_patch);
libmv_floatBufferToFloatImage(
image2, image2_width, image2_height, 1, &new_patch);
TrackRegionResult track_region_result;
TrackRegion(old_patch,
new_patch,
xx1,
yy1,
track_region_options,
xx2,
yy2,
&track_region_result);
// Convert to floats for the blender api.
for (int i = 0; i < 5; ++i) {
x2[i] = xx2[i];
y2[i] = yy2[i];
}
// TODO(keir): Update the termination string with failure details.
if (track_region_result.termination == TrackRegionResult::CONVERGENCE ||
track_region_result.termination == TrackRegionResult::NO_CONVERGENCE) {
tracking_result = true;
}
// Debug dump of patches.
#if defined(DUMP_FAILURE) || defined(DUMP_ALWAYS)
bool need_dump = !tracking_result;
# ifdef DUMP_ALWAYS
need_dump = true;
# endif
if (need_dump) {
libmv_saveImage(old_patch, "old_patch", x1[4], y1[4]);
libmv_saveImage(new_patch, "new_patch", x2[4], y2[4]);
if (options->image1_mask) {
libmv_saveImage(image1_mask, "mask", x2[4], y2[4]);
}
}
#endif
return tracking_result;
}
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