From 07a73913b6464d8eb394fdfef54d9bdf73f218e6 Mon Sep 17 00:00:00 2001
From: Symisc Systems <chm@symisc.net>
Date: Mon, 4 Jun 2018 06:11:24 +0200
Subject: [PATCH]  Erode an input binary image.

---
 samples/erode_image.c | 57 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 samples/erode_image.c

diff --git a/samples/erode_image.c b/samples/erode_image.c
new file mode 100644
index 0000000..ca40d0b
--- /dev/null
+++ b/samples/erode_image.c
@@ -0,0 +1,57 @@
+/*
+ * Programming introduction with the SOD Embedded Image Processing API.
+ * Copyright (C) PixLab | Symisc Systems, https://sod.pixlab.io
+ */
+/*
+* Compile this file together with the SOD embedded source code to generate
+* the executable. For example:
+*
+*  gcc sod.c erode_image.c -lm -Ofast -march=native -Wall -std=c99 -o sod_img_proc
+*  
+* Under Microsoft Visual Studio (>= 2015), just drop `sod.c` and its accompanying
+* header files on your source tree and you're done. If you have any trouble
+* integrating SOD in your project, please submit a support request at:
+* https://sod.pixlab.io/support.html
+*/
+/*
+* This simple program is a quick introduction on how to embed and start
+* experimenting with SOD without having to do a lot of tedious
+* reading and configuration.
+*
+* Make sure you have the latest release of SOD from:
+*  https://pixlab.io/downloads
+* The SOD Embedded C/C++ documentation is available at:
+*  https://sod.pixlab.io/api.html
+*/
+#include <stdio.h>
+#include "sod.h"
+/*
+* Erode an input binary image.
+*/
+int main(int argc, char *argv[])
+{
+	/* Input image (pass a path or use the test image shipped with the samples ZIP archive) */
+	const char *zInput = argc > 1 ? argv[1] : "./text.jpg";
+	/* Processed output image path */
+	const char *zOut = argc > 2 ? argv[2] : "./out_dilated.png";
+	/* Load the input image in the grayscale colorspace */
+	sod_img imgIn = sod_img_load_grayscale(zInput);
+	if (imgIn.data == 0) {
+		/* Invalid path, unsupported format, memory failure, etc. */
+		puts("Cannot load input image..exiting");
+		return 0;
+	}
+	/* 
+	 * Binarize the input image before the dilation process.
+	 */
+	sod_img binImg = sod_binarize_image(imgIn, 0);
+	/* Finally, erode the binary image, say  5 times */
+	sod_img erodeImg = sod_erode_image(binImg, 5);
+	/* Save the eroded image to the specified path */
+	sod_img_save_as_png(erodeImg, zOut);
+	/* Cleanup */
+	sod_free_image(imgIn);
+	sod_free_image(binImg);
+	sod_free_image(erodeImg);
+	return 0;
+}
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