From 3376771f20488b533cc48bb0700c966723e324ea Mon Sep 17 00:00:00 2001
From: Jim Martens <github@2martens.de>
Date: Fri, 18 Nov 2016 13:51:22 +0100
Subject: [PATCH] =?UTF-8?q?[BV]=20Mitschrift=20von=20=C3=9Cbung=205=20erst?=
 =?UTF-8?q?ellt?=
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Signed-off-by: Jim Martens <github@2martens.de>
---
 bv/uebung5_presence.m | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 bv/uebung5_presence.m

diff --git a/bv/uebung5_presence.m b/bv/uebung5_presence.m
new file mode 100644
index 0000000..f06a9c5
--- /dev/null
+++ b/bv/uebung5_presence.m
@@ -0,0 +1,36 @@
+text = imread('text.png');
+%figure, imshow(text);
+[L, components] = bwlabel(text, 8);
+cc = bwconncomp(text);
+pixelIDs = cc.PixelIdxList;
+[bin, index] = max(cellfun(@numel, pixelIDs));
+text(pixelIDs{index}) = 0;
+%figure, imshow(text);
+
+%----------
+img = imread('coins.png');
+filter = ones(3, 3) / 9;
+filter2 = ones(5, 5) / 25;
+imgbox = imboxfilt(img);
+img2 = imfilter(img, filter);
+img3 = imfilter(img, filter2);
+
+%----------
+cameraman = imread('cameraman.tif');
+pad1 = padarray(cameraman, [50 50]);
+pad2 = padarray(cameraman, [50 50], 'circular');
+pad3 = padarray(cameraman, [50 50], 'replicate');
+pad4 = padarray(cameraman, [50 50], 'symmetric');
+figure('Name', 'start'), imshow(cameraman);
+figure('Name', 'nullen'), imshow(pad1);
+figure('Name', 'circular'), imshow(pad2);
+figure('Name', 'replicate'), imshow(pad3);
+figure('Name', 'symmetric'), imshow(pad4);
+boxfilter = ones(3, 3) / 9;
+boxfiltered = imfilter(cameraman, boxfilter, 'replicate');
+figure('Name', 'boxfiltered'), imshow(boxfiltered);
+boxgaussfilter = ones(5, 5)/25;
+boxgaussfiltered1 = imfilter(cameraman, boxgaussfilter, 'replicate');
+gaussfiltered = imgaussfilt(cameraman, 1);
+figure('Name', 'gaussfiltered'), imshow(gaussfiltered);
+figure('Name', 'boxgaussfiltered'), imshow(boxgaussfiltered1);