diff options
| author | Vineeth T M <vineeth.tm@samsung.com> | 2014-10-27 09:41:51 +0530 |
|---|---|---|
| committer | Olivier Crête <olivier.crete@collabora.com> | 2018-05-04 11:50:06 +0200 |
| commit | 0869c06f9d563bec700f4fcb0f8285306775e5d2 (patch) | |
| tree | dc31ba38bd008e36aa1a583a64aec45db7eda351 /gst | |
| parent | cb1eb650c6826e49ca99965824dd079842c61400 (diff) | |
scenechange: improve detection algorithm
Scene detection determines, how many scenes have changed in a video.
It compared the previous frame with present frame to find out the score and a
threshold is calculated for the same.
I have added an intermediate condition which helps in improving the positive
detections.
https://bugzilla.gnome.org/show_bug.cgi?id=735094
Diffstat (limited to 'gst')
| -rw-r--r-- | gst/videofilters/gstscenechange.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/gst/videofilters/gstscenechange.c b/gst/videofilters/gstscenechange.c index 4fef2ac2a..c4504c06e 100644 --- a/gst/videofilters/gstscenechange.c +++ b/gst/videofilters/gstscenechange.c @@ -218,12 +218,15 @@ gst_scene_change_transform_frame_ip (GstVideoFilter * filter, threshold = 1.8 * score_max - 0.8 * score_min; - if (scenechange->n_diffs > 2) { + if (scenechange->n_diffs > (SC_N_DIFFS - 1)) { if (score < 5) { change = FALSE; } else if (score / threshold < 1.0) { change = FALSE; - } else if (score / threshold > 2.5) { + } else if ((score > 30) + && (score / scenechange->diffs[SC_N_DIFFS - 2] > 1.4)) { + change = TRUE; + } else if (score / threshold > 2.3) { change = TRUE; } else if (score > 50) { change = TRUE; @@ -234,6 +237,10 @@ gst_scene_change_transform_frame_ip (GstVideoFilter * filter, change = FALSE; } + if (change == TRUE) { + memset (scenechange->diffs, 0, sizeof (double) * SC_N_DIFFS); + scenechange->n_diffs = 0; + } #ifdef TESTING if (change != is_shot_change (scenechange->n_diffs)) { g_print ("%d %g %g %g %d\n", scenechange->n_diffs, score / threshold, |