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avfilter/vf_morpho: add tophat and blackhat operations

This commit is contained in:
Paul B Mahol 2021-09-29 16:29:00 +02:00
parent b4626da92b
commit f3b07b8b12
2 changed files with 57 additions and 4 deletions
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2
doc/filters.texi
View File

@ -15375,6 +15375,8 @@ Set morphological transform to apply, can be:
@item open
@item close
@item gradient
@item tophat
@item blackhat
@end table
Default is @code{erode}.

59
libavfilter/vf_morpho.c
View File

@ -40,6 +40,8 @@ enum MorphModes {
OPEN,
CLOSE,
GRADIENT,
TOPHAT,
BLACKHAT,
NB_MODES
};
@ -52,6 +54,7 @@ typedef struct IPlane {
void (*max_out_place)(uint8_t *c, const uint8_t *a, const uint8_t *b, int x);
void (*min_out_place)(uint8_t *c, const uint8_t *a, const uint8_t *b, int x);
void (*diff_rin_place)(uint8_t *a, const uint8_t *b, int x);
void (*max_in_place)(uint8_t *a, const uint8_t *b, int x);
void (*min_in_place)(uint8_t *a, const uint8_t *b, int x);
void (*diff_in_place)(uint8_t *a, const uint8_t *b, int x);
@ -127,6 +130,8 @@ static const AVOption morpho_options[] = {
{ "open", NULL, 0, AV_OPT_TYPE_CONST, {.i64=OPEN}, 0, 0, FLAGS, "mode" },
{ "close", NULL, 0, AV_OPT_TYPE_CONST, {.i64=CLOSE}, 0, 0, FLAGS, "mode" },
{ "gradient",NULL, 0, AV_OPT_TYPE_CONST, {.i64=GRADIENT},0, 0, FLAGS, "mode" },
{ "tophat",NULL, 0, AV_OPT_TYPE_CONST, {.i64=TOPHAT}, 0, 0, FLAGS, "mode" },
{ "blackhat",NULL, 0, AV_OPT_TYPE_CONST, {.i64=BLACKHAT},0, 0, FLAGS, "mode" },
{ "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=7}, 0, 15, FLAGS },
{ "structure", "when to process structures", OFFSET(structures), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS, "str" },
{ "first", "process only first structure, ignore rest", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "str" },
@ -187,10 +192,16 @@ static void maxinplace_fun(uint8_t *a, const uint8_t *b, int x)
a[i] = FFMAX(a[i], b[i]);
}
static void diff_fun(uint8_t *a, const uint8_t *b, int x)
{
for (int i = 0; i < x; i++)
a[i] = FFMAX(b[i] - a[i], 0);
}
static void diffinplace_fun(uint8_t *a, const uint8_t *b, int x)
{
for (int i = 0; i < x; i++)
a[i] -= b[i];
a[i] = FFMAX(a[i] - b[i], 0);
}
static void min16_fun(uint8_t *cc, const uint8_t *aa, const uint8_t *bb, int x)
@ -212,13 +223,22 @@ static void mininplace16_fun(uint8_t *aa, const uint8_t *bb, int x)
a[i] = FFMIN(a[i], b[i]);
}
static void diff16_fun(uint8_t *aa, const uint8_t *bb, int x)
{
const uint16_t *b = (const uint16_t *)bb;
uint16_t *a = (uint16_t *)aa;
for (int i = 0; i < x; i++)
a[i] = FFMAX(b[i] - a[i], 0);
}
static void diffinplace16_fun(uint8_t *aa, const uint8_t *bb, int x)
{
uint16_t *a = (uint16_t *)aa;
const uint16_t *b = (const uint16_t *)bb;
for (int i = 0; i < x; i++)
a[i] -= b[i];
a[i] = FFMAX(a[i] - b[i], 0);
}
static void max16_fun(uint8_t *cc, const uint8_t *aa, const uint8_t *bb, int x)
@ -471,12 +491,18 @@ static int erode(IPlane *g, IPlane *f, chord_set *SE, LUT *Ty)
return 0;
}
static void gradient(IPlane *g, IPlane *f)
static void difference(IPlane *g, IPlane *f)
{
for (int y = 0; y < f->h; y++)
f->diff_in_place(g->img[y], f->img[y], f->w);
}
static void difference2(IPlane *g, IPlane *f)
{
for (int y = 0; y < f->h; y++)
f->diff_rin_place(g->img[y], f->img[y], f->w);
}
static int insert_chord_set(chord_set *chords, chord c)
{
// Checking if chord fits in dynamic array, resize if not.
@ -711,6 +737,7 @@ static int read_iplane(IPlane *imp, const uint8_t *dst, int dst_linesize,
imp->type_size = type_size;
imp->max_out_place = type_size == 1 ? max_fun : max16_fun;
imp->min_out_place = type_size == 1 ? min_fun : min16_fun;
imp->diff_rin_place = type_size == 1 ? diff_fun : diff16_fun;
imp->max_in_place = type_size == 1 ? maxinplace_fun : maxinplace16_fun;
imp->min_in_place = type_size == 1 ? mininplace_fun : mininplace16_fun;
imp->diff_in_place = type_size == 1 ? diffinplace_fun : diffinplace16_fun;
@ -867,7 +894,31 @@ copy:
ret = erode(&s->h[p], &s->f[p], &s->SE[p], &s->Ty[1][p]);
if (ret < 0)
return ret;
gradient(&s->g[p], &s->h[p]);
difference(&s->g[p], &s->h[p]);
break;
case TOPHAT:
ret = read_iplane(&s->h[p], s->temp->data[p], s->temp->linesize[p], width, height, 1, type_size, depth);
if (ret < 0)
break;
ret = erode(&s->h[p], &s->f[p], &s->SE[p], &s->Ty[0][p]);
if (ret < 0)
break;
ret = dilate(&s->g[p], &s->h[p], &s->SE[p], &s->Ty[1][p]);
if (ret < 0)
break;
difference2(&s->g[p], &s->f[p]);
break;
case BLACKHAT:
ret = read_iplane(&s->h[p], s->temp->data[p], s->temp->linesize[p], width, height, 1, type_size, depth);
if (ret < 0)
break;
ret = dilate(&s->h[p], &s->f[p], &s->SE[p], &s->Ty[0][p]);
if (ret < 0)
break;
ret = erode(&s->g[p], &s->h[p], &s->SE[p], &s->Ty[1][p]);
if (ret < 0)
break;
difference(&s->g[p], &s->f[p]);
break;
default:
av_assert0(0);