diff options
| -rw-r--r-- | Makefile | 5 | ||||
| -rw-r--r-- | roi.c | 100 |
2 files changed, 103 insertions, 2 deletions
@@ -5,13 +5,14 @@ CFLAGS = -ggdb -std=c99 -pedantic -Wall $(DEFINES) \ LDFLAGS = $(LIBS) -lm \ $(shell pkg-config --libs gdk-pixbuf-2.0 glib-2.0 gthread-2.0) -PROGS = wimmel wimmel_gl -OBJS = wimmel.o wimmel_gl.o util.o +PROGS = wimmel wimmel_gl roi +OBJS = wimmel.o wimmel_gl.o util.o roi.o all: $(PROGS) wimmel: wimmel.o util.o wimmel_gl: wimmel_gl.o util.o +roi: roi.o .PHONY: clean all @@ -0,0 +1,100 @@ +#include <stdlib.h> +#include <glib.h> +#include <gdk-pixbuf/gdk-pixbuf.h> +#include <math.h> + +int +main(int argc, char *argv[]) +{ + char *file; + GdkPixbuf *input; + GdkPixbuf *match_tmp, *match; + int x, y, i, j; + int x1, y1, mwidth, mheight, width, height; + gint stride, nch; + guchar *pix, *row; + + g_type_init(); + + if (argc < 5) + exit(EXIT_FAILURE); + + file = argv[1]; + x1 = atoi(argv[2]); + y1 = atoi(argv[3]); + mwidth = atoi(argv[4]); + mheight = atoi(argv[5]); + + input = gdk_pixbuf_new_from_file(file, NULL); + if (!input) + exit(EXIT_FAILURE); + + match_tmp = gdk_pixbuf_new_subpixbuf(input, x1, y1, mwidth, mheight); + match = gdk_pixbuf_copy(match_tmp); + g_object_unref(match_tmp); + + struct match_interval { + gint min, max; + } interval[3]; + + nch = gdk_pixbuf_get_n_channels(match); + stride = gdk_pixbuf_get_rowstride(match); + gint s = mwidth * mheight; + + gint middle[3] = { 0, 0, 0 }; + for (y = 0, row = gdk_pixbuf_get_pixels(match); + y < mheight; ++y, row += stride) { + for (x = 0, pix = row; x < mwidth; ++x, pix += nch) { + for (i = 0; i < 3; ++i) + middle[i] += pix[i]; + } + } + for (i = 0; i < 3; ++i) + middle[i] /= s; + + gint sigma[3] = { 0, 0, 0 }; + for (y = 0, row = gdk_pixbuf_get_pixels(match); + y < mheight; ++y, row += stride) { + for (x = 0, pix = row; x < mwidth; ++x, pix += nch) { + for (i = 0; i < 3; ++i) + sigma[i] += + (pix[i] - middle[i]) * + (pix[i] - middle[i]); + } + } + + for (i = 0; i < 3; ++i) + sigma[i] = sqrt(sigma[i] / (s - 1)); + + printf("middle: %3d, %3d, %3d\n", middle[0], middle[1], middle[2]); + printf("sigma: %3d, %3d, %3d\n", sigma[0], sigma[1], sigma[2]); + + for (i = 0; i < 3; ++i) { + interval[i].min = middle[i] - 2 * sigma[i]; + interval[i].max = middle[i] + 2 * sigma[i]; + printf("interval %d: [%3d - %3d]\n", + i, interval[i].min, interval[i].max); + } + + nch = gdk_pixbuf_get_n_channels(input); + stride = gdk_pixbuf_get_rowstride(input); + width = gdk_pixbuf_get_width(input); + height = gdk_pixbuf_get_height(input); + for (y = 0, row = gdk_pixbuf_get_pixels(input); + y < height; ++y, row += stride) { + for (x = 0, pix = row; x < width; ++x, pix += nch) { + int H = 1; + for (i = 0; i < 3; ++i) { + if (!(pix[i] >= interval[i].min && + pix[i] <= interval[i].max)) + H = 0; + } + if (H) + pix[0] = pix[1] = pix[2] = 0; + } + } + + gdk_pixbuf_save(input, "output_roi.tiff", "tiff", NULL, NULL); + g_object_unref(input); + g_object_unref(match); +} |