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binmorph.h

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+/*
+ * This file is part of the loccorr project.
+ * Copyright 2021 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+#ifndef BINMORPH_H__
+#define BINMORPH_H__
+
+#include <stdbool.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include "fits.h"
+
+// minimal image size for morph operations
+#define MINWIDTH    (9)
+#define MINHEIGHT   (3)
+
+// simple box with given borders
+typedef struct{
+    uint16_t xmin;
+    uint16_t xmax;
+    uint16_t ymin;
+    uint16_t ymax;
+    uint32_t area; // total amount of object pixels inside the box
+} Box;
+
+typedef struct{
+    size_t Nobj;
+    Box *boxes;
+} ConnComps;
+
+
+// morphological operations:
+uint8_t *dilation(uint8_t *image, int W, int H);
+uint8_t *dilationN(uint8_t *image, int W, int H, int N);
+uint8_t *erosion(uint8_t *image, int W, int H);
+uint8_t *erosionN(uint8_t *image, int W, int H, int N);
+uint8_t *openingN(uint8_t *image, int W, int H, int N);
+uint8_t *closingN(uint8_t *image, int W, int H, int N);
+uint8_t *topHat(uint8_t *image, int W, int H, int N);
+uint8_t *botHat(uint8_t *image, int W, int H, int N);
+
+// clear non 4-connected pixels
+uint8_t *filter4(uint8_t *image, int W, int H);
+// clear single pixels
+uint8_t *filter8(uint8_t *image, int W, int H);
+
+size_t *cclabel4(uint8_t *Img, int W, int H, ConnComps **CC);
+size_t *cclabel8(uint8_t *Img, int W, int H, size_t *Nobj);
+
+#if 0
+// logical operations
+uint8_t *imand(uint8_t *im1, uint8_t *im2, int W, int H);
+uint8_t *substim(uint8_t *im1, uint8_t *im2, int W, int H);
+/*
+// conncomp
+// this is a box structure containing one object; data is aligned by original image bytes!
+typedef struct {
+    uint8_t *data; // pattern data in "packed" format
+    int x,   // x coordinate of LU-pixel of box in "unpacked" image (by pixels)
+    y,       // y -//-
+    x_0;     // x coordinate in "packed" image (morph operations should work with it)
+    size_t N;// number of component, starting from 1
+} CCbox;
+*/
+
+IMAGE *cclabel4(IMAGE *I, double threshold, size_t *Nobj);
+IMAGE *cclabel8(IMAGE *I, double threshold, size_t *Nobj);
+#endif
+
+#endif // BINMORPH_H__