diff options
author | Leonard Kugis <leonard@kug.is> | 2022-11-22 08:37:34 +0100 |
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committer | Leonard Kugis <leonard@kug.is> | 2022-11-22 08:37:34 +0100 |
commit | b781b4150cf86b78226b616bb68cbad99f133ad2 (patch) | |
tree | 2a34dd50cb108837ec9be6fe84a47fe42f7cec54 |
Initial commit
-rw-r--r-- | .gitignore | 226 | ||||
-rw-r--r-- | 02_HelperFunctions.py | 83 | ||||
-rw-r--r-- | images/hummingbird_from_pixabay.png | bin | 0 -> 449215 bytes | |||
-rw-r--r-- | images/hummingbird_from_pixabay2.png | bin | 0 -> 354063 bytes | |||
-rw-r--r-- | images/hummingbird_from_pixabay3.png | bin | 0 -> 153971 bytes | |||
-rw-r--r-- | openCVTools.py | 45 | ||||
-rw-r--r-- | pyvenv.cfg | 3 |
7 files changed, 357 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..402f5fa --- /dev/null +++ b/.gitignore @@ -0,0 +1,226 @@ +# Created by https://www.toptal.com/developers/gitignore/api/python,visualstudiocode,linux,windows +# Edit at https://www.toptal.com/developers/gitignore?templates=python,visualstudiocode,linux,windows + +### Linux ### +*~ + +# temporary files which can be created if a process still has a handle open of a deleted file +.fuse_hidden* + +# KDE directory preferences +.directory + +# Linux trash folder which might appear on any partition or disk +.Trash-* + +# .nfs files are created when an open file is removed but is still being accessed +.nfs* + +### Python ### +# Byte-compiled / optimized / DLL files +__pycache__/ +*.py[cod] +*$py.class + +# C extensions +*.so + +# Distribution / packaging +.Python +build/ +develop-eggs/ +dist/ +downloads/ +eggs/ +.eggs/ +lib/ +lib64/ +parts/ +sdist/ +var/ +wheels/ +share/python-wheels/ +*.egg-info/ +.installed.cfg +*.egg +MANIFEST + +# PyInstaller +# Usually these files are written by a python script from a template +# before PyInstaller builds the exe, so as to inject date/other infos into it. +*.manifest +*.spec + +# Installer logs +pip-log.txt +pip-delete-this-directory.txt + +# Unit test / coverage reports +htmlcov/ +.tox/ +.nox/ +.coverage +.coverage.* +.cache +nosetests.xml +coverage.xml +*.cover +*.py,cover +.hypothesis/ +.pytest_cache/ +cover/ + +# Translations +*.mo +*.pot + +# Django stuff: +*.log +local_settings.py +db.sqlite3 +db.sqlite3-journal + +# Flask stuff: +instance/ +.webassets-cache + +# Scrapy stuff: +.scrapy + +# Sphinx documentation +docs/_build/ + +# PyBuilder +.pybuilder/ +target/ + +# Jupyter Notebook +.ipynb_checkpoints + +# IPython +profile_default/ +ipython_config.py + +# pyenv +# For a library or package, you might want to ignore these files since the code is +# intended to run in multiple environments; otherwise, check them in: +# .python-version + +# pipenv +# According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control. +# However, in case of collaboration, if having platform-specific dependencies or dependencies +# having no cross-platform support, pipenv may install dependencies that don't work, or not +# install all needed dependencies. +#Pipfile.lock + +# poetry +# Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control. +# This is especially recommended for binary packages to ensure reproducibility, and is more +# commonly ignored for libraries. +# https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control +#poetry.lock + +# pdm +# Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control. +#pdm.lock +# pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it +# in version control. +# https://pdm.fming.dev/#use-with-ide +.pdm.toml + +# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm +__pypackages__/ + +# Celery stuff +celerybeat-schedule +celerybeat.pid + +# SageMath parsed files +*.sage.py + +# Environments +.env +.venv +env/ +venv/ +ENV/ +env.bak/ +venv.bak/ + +# Spyder project settings +.spyderproject +.spyproject + +# Rope project settings +.ropeproject + +# mkdocs documentation +/site + +# mypy +.mypy_cache/ +.dmypy.json +dmypy.json + +# Pyre type checker +.pyre/ + +# pytype static type analyzer +.pytype/ + +# Cython debug symbols +cython_debug/ + +# PyCharm +# JetBrains specific template is maintained in a separate JetBrains.gitignore that can +# be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore +# and can be added to the global gitignore or merged into this file. For a more nuclear +# option (not recommended) you can uncomment the following to ignore the entire idea folder. +#.idea/ + +### VisualStudioCode ### +.vscode/* +!.vscode/settings.json +!.vscode/tasks.json +!.vscode/launch.json +!.vscode/extensions.json +!.vscode/*.code-snippets + +# Local History for Visual Studio Code +.history/ + +# Built Visual Studio Code Extensions +*.vsix + +### VisualStudioCode Patch ### +# Ignore all local history of files +.history +.ionide + +### Windows ### +# Windows thumbnail cache files +Thumbs.db +Thumbs.db:encryptable +ehthumbs.db +ehthumbs_vista.db + +# Dump file +*.stackdump + +# Folder config file +[Dd]esktop.ini + +# Recycle Bin used on file shares +$RECYCLE.BIN/ + +# Windows Installer files +*.cab +*.msi +*.msix +*.msm +*.msp + +# Windows shortcuts +*.lnk + +# End of https://www.toptal.com/developers/gitignore/api/python,visualstudiocode,linux,windows diff --git a/02_HelperFunctions.py b/02_HelperFunctions.py new file mode 100644 index 0000000..1ef0944 --- /dev/null +++ b/02_HelperFunctions.py @@ -0,0 +1,83 @@ +#!/usr/bin/python3
+# -*- coding: utf-8 -*-
+
+
+import cv2 as cv
+import openCVTools as cvt
+import numpy as np
+import matplotlib.pyplot as plt
+
+def REPLACE_THIS(input): return input
+
+
+# load image
+imgOriginal = cvt.safeLoad('images/hummingbird_from_pixabay.png')
+cvt.showImage("Original image", imgOriginal)
+
+
+# TODO Aufgabe 1
+'''
+Konvertieren Sie das Bild in ein 1-Kanal Schwarzweiß(Grauton)-Bild.
+Passen Sie die Funktionen `imageStats(..)` und `showImage(..)` so an, dass sie sowohl für Grau- als auch Farbbilder korrekt funktionieren.
+'''
+imgGray = REPLACE_THIS(imgOriginal)
+cvt.showImage("Grayscale image", imgGray)
+
+
+'''
+Konvertieren Sie das originale Bild von seinem Stndarddatentyp (`uint8` pro Farbkanal) in `float` und zeigen Sie es an.
+Voraussichtlich wird das Bild nahezu weiß sein. Versuchen Sie herauszufinden woran das liegt und passen Sie das Bild entsprechend an.
+'''
+img = REPLACE_THIS(imgOriginal)
+print("Floating point image:")
+cvt.showImage("Floating point image", img)
+
+
+# TODO Aufgabe 2
+'''
+Zeichnen Sie ein rotes Rechteck (110 x 220 Pixel) genau in die Mitte des Bildes.
+Versuchen Sie dazu den Slicing Operator aus Python zu nutzen.
+'''
+#
+# ???
+#
+
+cvt.showImage("Red box", img)
+
+
+# TODO Aufgabe 3
+'''
+Hängen Sie eine Callback-Funktion `mouse_move(event)` an das Bild im Fenster "Red box", die bei jeder Mausbewegung aufgerufen wird. Sie soll die Bild(!)-Koordinaten des Mauszeigers (x, y) und evtl. gedrückte Tasten ausgeben.
+Sie benötigen dazu u.U. die Referenz auf das Zeichenfeld des Fensters (`plt.figure(title)`) aus der Funktion `showImage(..)`.
+'''
+#
+# ???
+#
+
+'''
+Optional: Entfernen Sie die Callback-Funktion, sobald auf das Bild geklickt wird.
+'''
+#
+# ???
+#
+
+
+# TODO Aufgabe 4
+'''
+Schreiben Sie eine Funktion `showImageList(...)`, die Bilder auch als Liste annimmt und diese horizontal nebeneinander anzeigt.
+'''
+img2 = cvt.safeLoad('images/hummingbird_from_pixabay2.png')
+img3 = cvt.safeLoad('images/hummingbird_from_pixabay3.png')
+
+# cvt.showImageList("Image list", (imgOriginal, img, img2, img3))
+
+
+# TODO Aufgabe 5
+'''
+Erweitern Sie die Funktionen `showImage(...)` und `showImageList(...)` um einen weiteren Parameter `normalize` vom Typ Boolean. Wenn dieser auf `False` gesetzt ist, dann soll die Funktion wie bisher funktionieren, wenn dieser auf `True` gesetzt wird, dann soll jedes Eingabebild kopiert und der Kontrast der kopierten Bilder vor der Anzeige mittels Contrast Stretching verbessert werden, damit der gesamte Wertebereich ausgenutzt wird.
+'''
+img3[:,:,:] = img3[:,:,:] / 4 # darken the image to show contrast stretching
+
+#
+# ???
+#
diff --git a/images/hummingbird_from_pixabay.png b/images/hummingbird_from_pixabay.png Binary files differnew file mode 100644 index 0000000..60e845a --- /dev/null +++ b/images/hummingbird_from_pixabay.png diff --git a/images/hummingbird_from_pixabay2.png b/images/hummingbird_from_pixabay2.png Binary files differnew file mode 100644 index 0000000..39c756f --- /dev/null +++ b/images/hummingbird_from_pixabay2.png diff --git a/images/hummingbird_from_pixabay3.png b/images/hummingbird_from_pixabay3.png Binary files differnew file mode 100644 index 0000000..63ade5a --- /dev/null +++ b/images/hummingbird_from_pixabay3.png diff --git a/openCVTools.py b/openCVTools.py new file mode 100644 index 0000000..484c3fa --- /dev/null +++ b/openCVTools.py @@ -0,0 +1,45 @@ +import cv2 as cv
+import sys
+import numpy as np
+import matplotlib.pyplot as plt
+
+
+def safeLoad(pathToFile):
+ '''
+ OpenCV does no validation checks due to performance reasons.
+ Therefore, this function checks if the image could be loaded
+ '''
+ img = cv.imread(pathToFile)
+ if img is None:
+ sys.exit("Image could not be loaded.")
+ return img
+
+
+# TODO Aufgabe 1
+'''
+Passen Sie die Funktion `imageStats(..)` so an, dass sie sowohl Grau- als auch Farbbilder korrekt anzeigt.
+Erweitern Sie die Funktion zusätzlich so dass der Datentyp mit ausgegeben wird.
+'''
+def imageStats(img):
+ '''
+ Returns a few image statistics
+ '''
+ s = img.shape
+ return f'Width: {s[1]}, Height: {s[0]}, Channels: {s[2]}'
+
+
+
+# TODO Aufgabe 1
+'''
+Passen Sie die Funktion `showImage(..)` so an, dass sie sowohl Grau- als auch Farbbilder korrekt anzeigt.
+'''
+def showImage(title, originalImg):
+ print(imageStats(originalImg))
+
+ img = originalImg.copy()
+ img = img[:,:,::-1]
+ plt.figure(title)
+ plt.imshow(img)
+ plt.show()
+
+
diff --git a/pyvenv.cfg b/pyvenv.cfg new file mode 100644 index 0000000..8810f2d --- /dev/null +++ b/pyvenv.cfg @@ -0,0 +1,3 @@ +home = /usr/bin +include-system-site-packages = false +version = 3.10.8 |