commit 1fdf6986e7bc23e2bdf4b2b7973652a2cb2dd3b7
parent 975a02fba76fce7526278ea09a27cc0aae608d30
Author: Mattias Andrée <maandree@kth.se>
Date: Wed, 12 Jul 2017 03:40:51 +0200
Add blind-apply-palette and blind-colour-ciexyz always outputs all three parameters
Signed-off-by: Mattias Andrée <maandree@kth.se>
Diffstat:
7 files changed, 145 insertions(+), 5 deletions(-)
diff --git a/Makefile b/Makefile
@@ -2,6 +2,7 @@ CONFIGFILE = config.mk
include $(CONFIGFILE)
BIN =\
+ blind-apply-palette\
blind-arithm\
blind-cat-cols\
blind-cat-rows\
diff --git a/man/blind-apply-palette.1 b/man/blind-apply-palette.1
@@ -0,0 +1,23 @@
+.TH BLIND-APPLY-PALETTE 1 blind
+.SH NAME
+blind-apply-palette - Apply a colour palette to a video
+.SH SYNOPSIS
+.B blind-apply-palette
+.I palette-stream
+.SH DESCRIPTION
+.B blind-apply-palette
+reads a video from stdin and video from
+.IR palette-stream .
+For each frame, the colours in the video from
+stdin are replaces with the closest match colour
+from the same from in the video in
+.IR palette-stream .
+The resulting video is printed to stdout.
+.SH SEE ALSO
+.BR blind (7),
+.BR blind-repeat (1),
+.BR blind-get-colours (1),
+.BR blind-repeat-tessellation (1)
+.SH AUTHORS
+Mattias Andrée
+.RI < maandree@kth.se >
diff --git a/man/blind-get-colours.1 b/man/blind-get-colours.1
@@ -9,6 +9,7 @@ reads a video from stdin and prints a single-frame
video to stdout contain all colours from the video.
.SH SEE ALSO
.BR blind (7),
+.BR blind-apply-palette (1),
.BR blind-repeat-tessellation (1)
.SH AUTHORS
Mattias Andrée
diff --git a/man/blind-repeat-tessellation.1 b/man/blind-repeat-tessellation.1
@@ -29,7 +29,8 @@ the video from stdin into memory. A frame requires 32
bytes per pixel it contains.
.SH SEE ALSO
.BR blind (7),
-.BR blind-get-colours (1)
+.BR blind-get-colours (1),
+.BR blind-apply-palette (1)
.SH AUTHORS
Mattias Andrée
.RI < maandree@kth.se >
diff --git a/src/blind-apply-palette.c b/src/blind-apply-palette.c
@@ -0,0 +1,107 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+USAGE("palette-stream")
+
+
+static double (*compare)(double x1, double y1, double z1, double a1, double x2, double y2, double z2, double a2);
+/* TODO add more formulae: https://en.wikipedia.org/wiki/Color_difference */
+
+
+static double
+distance_xyz(double x1, double y1, double z1, double a1, double x2, double y2, double z2, double a2)
+{
+ x2 -= x1, x2 *= x2;
+ y2 -= y1, y2 *= y2;
+ z2 -= z1, z2 *= z2;
+ a2 -= a1, a2 *= a2;
+ return sqrt(x2 + y2 + z2 + a2);
+}
+
+
+#define PROCESS(TYPE, SUFFIX)\
+ static void\
+ process_##SUFFIX(struct stream *stream, struct stream *palette, char *pal)\
+ {\
+ size_t i, j, n, m;\
+ size_t palsiz = palette->width * palette->height;\
+ size_t best = 0;\
+ TYPE x, y, z, a, lx = 0, ly = 0, lz = 0, la = 0;\
+ TYPE cx, cy, cz, ca;\
+ double distance, best_distance = 0;\
+ while (eread_frame(palette, pal)) {\
+ m = stream->frame_size;\
+ do {\
+ n = MIN(stream->ptr, m) / stream->pixel_size;\
+ for (i = 0; i < n; i++) {\
+ x = ((TYPE *)(stream->buf + i * stream->pixel_size))[0];\
+ y = ((TYPE *)(stream->buf + i * stream->pixel_size))[1];\
+ z = ((TYPE *)(stream->buf + i * stream->pixel_size))[2];\
+ a = ((TYPE *)(stream->buf + i * stream->pixel_size))[3];\
+ if ((!i && m == stream->frame_size) || x != lx || y != ly || z != lz || a != la) {\
+ for (j = 0; j < palsiz; j++) {\
+ cx = ((TYPE *)(pal + j * stream->pixel_size))[0];\
+ cy = ((TYPE *)(pal + j * stream->pixel_size))[1];\
+ cz = ((TYPE *)(pal + j * stream->pixel_size))[2];\
+ ca = ((TYPE *)(pal + j * stream->pixel_size))[3];\
+ distance = compare((double)x, (double)y, (double)z, (double)a,\
+ (double)cx, (double)cy, (double)cz, (double)ca);\
+ if (!j || distance < best_distance) {\
+ best_distance = distance;\
+ best = j;\
+ }\
+ }\
+ lx = x, ly = y, lz = z, la = a;\
+ }\
+ memcpy(stream->buf + i * stream->pixel_size,\
+ pal + best * stream->pixel_size,\
+ stream->pixel_size);\
+ }\
+ m -= n *= stream->pixel_size;\
+ ewriteall(STDOUT_FILENO, stream->buf, n, "<stdout>");\
+ memmove(stream->buf, stream->buf + n, stream->ptr -= n);\
+ } while (m && eread_stream(stream, SIZE_MAX));\
+ if (m)\
+ eprintf("%s: incomplete frame\n", stream->file);\
+ }\
+ }
+
+PROCESS(double, lf)
+PROCESS(float, f)
+
+
+int
+main(int argc, char *argv[])
+{
+ struct stream stream, palette;
+ void (*process)(struct stream *stream, struct stream *palette, char *pal);
+ char *pal;
+
+ compare = distance_xyz;
+
+ UNOFLAGS(argc != 1);
+
+ eopen_stream(&stream, NULL);
+ eopen_stream(&palette, argv[0]);
+
+ if (!strcmp(stream.pixfmt, "xyza"))
+ process = process_lf;
+ else if (!strcmp(stream.pixfmt, "xyza f"))
+ process = process_f;
+ else
+ eprintf("pixel format %s is not supported, try xyza\n", stream.pixfmt);
+
+ if (strcmp(stream.pixfmt, palette.pixfmt))
+ eprintf("videos use incompatible pixel formats\n");
+
+ echeck_dimensions(&stream, WIDTH | HEIGHT, NULL);
+ echeck_dimensions(&palette, WIDTH | HEIGHT, NULL);
+ pal = emalloc(palette.frame_size);
+ fprint_stream_head(stdout, &stream);
+ efflush(stdout, "<stdout>");
+
+ process(&stream, &palette, pal);
+
+ free(pal);
+ return 0;
+}
diff --git a/src/blind-chroma-key.c b/src/blind-chroma-key.c
@@ -27,6 +27,7 @@ USAGE("key-stream")
z = z1 - keyxyza[6];\
a2 = keyxyza[7];\
variance2 = x * x + y * y + z * z;\
+ /* TODO add more formulae: https://en.wikipedia.org/wiki/Color_difference */\
if (a2 > a1) {\
a1 = 1 - a1;\
a2 = 1 - a2;\
diff --git a/src/blind-colour-ciexyz.c b/src/blind-colour-ciexyz.c
@@ -6,14 +6,20 @@ USAGE("(X Y Z | Y)")
int
main(int argc, char *argv[])
{
+ double X, Y, Z;
+
UNOFLAGS(0);
- if (argc == 1)
- printf("%s\n", argv[0]);
- else if (argc == 3)
+ if (argc == 1) {
+ Y = etolf_arg("the Y value", argv[0]);
+ X = Y * D65_XYZ_X;
+ Z = Y * D65_XYZ_Z;
+ printf("%lf %lf %lf\n", X, Y, Z);
+ } else if (argc == 3) {
printf("%s %s %s\n", argv[0], argv[1], argv[2]);
- else
+ } else {
usage();
+ }
efshut(stdout, "<stdout>");
return 0;
