migrate image_view docs (#934)

* migrate docs from ROS wiki
* FIX: video recorder start/end services should only be advertised when
feature is enabled
* FIX: image remapping didn't work as expected/documented in
stereo_image_proc

image_view/doc/changes.rst

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+Changelog Notes
+===============
+
+Jazzy Jalisco
+-------------
+There are several major change between ``Iron`` and ``Jazzy``:
+
+ * All components now properly support ``image_transport`` parameter.

image_view/doc/components.rst

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+Nodes and Components
+====================
+
+image_view::DisparityViewNode
+-----------------------------
+Simple image viewer for ROS stereo_msgs/DisparityImage topics.
+Color-maps the disparity image for visualization.
+Node name is ``disparity_view``.
+
+Subscribed Topics
+^^^^^^^^^^^^^^^^^
+ * **image** (sensor_msgs/DisparityImage): The disparity image topic.
+
+Parameters
+^^^^^^^^^^
+ * **autosize** (bool, default: false): Whether the window should autosize
+   itself to the image or be resizeable by the user.
+ * **window_name** (string, default: name of the image topic):
+   The name of the display window.
+
+image_view::ExtractImagesNode
+-----------------------------
+This tool also allows you to save images as jpg/png file from
+streaming (ROS sensor_msgs/Image topic) to a file.
+``image_saver`` node provide very similar functionalities,
+such as providing service call to trigger the node to save
+images, save images other than JPEG format, etc.
+
+This tool allows you to save images as jpg/png file from streaming
+(ROS sensor_msgs/Image topic) to a file. From command line, you
+can run with:
+
+.. code-block:: bash
+    
+    ros2 run image_view image_saver --ros-args -r image:=[your topic]
+
+or see this answer to control the timing of capture.
+
+Subscribed Topics
+^^^^^^^^^^^^^^^^^
+ * **image** (sensor_msgs/Image): Image topic to visualize.
+
+Parameters
+----------
+ * **filename_format** (string, default: "frame%04i.jpg"): File name for
+   saved images, you must add use '%04i' for sequence number.
+ * **image_transport** (string, default: raw): Image transport to use.
+ * **sec_per_frame** (double, default: 0.1): Seconds between saved frames.
+
+image_view::ImageViewNode
+-------------------------
+Simple image viewer for ROS sensor_msgs/Image topics. Node name
+is ``image_view``.
+
+Subscribed Topics
+^^^^^^^^^^^^^^^^^
+ * **image** (sensor_msgs/Image): Image topic to visualize.
+
+Parameters
+^^^^^^^^^^
+ * **autosize** (bool, default: false): Whether the window should autosize
+   itself to the image or be resizeable by the user.
+ * **filename_format** (string, default: "frame%04i.jpg"): printf-style
+   format for saved image names. Use to control name, location and format
+   of saved images.
+ * **image_transport** (string, default: raw): Image transport to use.
+ * **window_name** (string, default: name of the image topic):
+   The name of the display window.
+
+image_view::ImageSaverNode
+--------------------------
+This tool allows you to save images as jpg/png file from streaming
+(ROS sensor_msgs/Image topic) to a file. From command line, you
+can run with:
+
+.. code-block:: bash
+    
+    ros2 run image_view image_saver --ros-args -r image:=[your topic]
+
+or see this answer to control the timing of capture.
+
+Subscribed Topics
+^^^^^^^^^^^^^^^^^
+ * **image** (sensor_msgs/Image): Image topic to visualize.
+
+Services
+^^^^^^^^
+ * **save** (std_srvs/Empty): Save images, you need to set
+   the ``save_all_images`` parameter to false.
+ * **start** (std_srvs/Trigger): Start saving images.
+ * **end** (std_srvs/Trigger): Stop saving images.
+
+Parameters
+----------
+ * **encoding** (string, default:"bgr8"): Encoding type of input image topic.
+ * **filename_format** (string, default: "left%04i.jpg"): File name for
+   saved images, you can use '%04i' for sequence number, and '%s' for default
+   file format, you can use 'jpg' ,'png', 'pgm' as filename suffixes.
+ * **image_transport** (string, default: raw): Image transport to use.
+ * **save_all_images** (bool, default: true): If set to false, images
+   are only saved when 'save' service is called.
+ * **stamped_filename** (bool, default: false): If set to true, a timestamp
+   is appended to each filename.
+ * **request_start_end** (bool, default: false): If set to true, the start
+   and end services will be advertised and can be used to start and Stop
+   saving images. NOTE: ``save_all_images`` must be set to true, or these
+   services won't do anything.
+
+image_view::StereoImageViewNode
+-------------------------------
+Viewer for stereo images. Shows the synchronized left/right image pair
+and the disparity image (color-mapped) computed from them.
+Node name is ``stereo_image_view``.
+
+It is expected that ``<stereo>`` and ``<image>`` will be remapped to the
+appropriate names (as show in :ref:`Viewing Stereo Images`).
+
+Subscribed Topics
+^^^^^^^^^^^^^^^^^
+ * **<stereo>/left/<image>** (sensor_msgs/Image): The left image topic.
+ * **<stereo>/right/<image>** (sensor_msgs/Image): The right image topic.
+ * **<stereo>/disparity** (stereo_msgs/DisparityImage): The disparity image
+   computed from the left/right stereo pair.
+
+Parameters
+^^^^^^^^^^
+ * **approximate_sync** (bool, default: false): Whether to use approximate
+   synchronization. Set to true if the left and right cameras do not
+   produce exactly synced timestamps.
+ * **autosize** (bool, default: false): Whether the window should autosize
+   itself to the image or be resizeable by the user.
+ * **filename_format** (string, default: "%s%04i.jpg"): printf-style
+   format for saved image names. Use to control name, location and format
+   of saved images. The string argument is "left" or "right".
+ * **image_transport** (string, default: raw): Image transport to use.
+ * **queue_size** (int, default: 5): Size of message queue for each
+   synchronized topic. You may need to raise this if disparity processing
+   takes too long, or if there are significant network delays.
+
+image_view::VideoRecorderNode
+-----------------------------
+This tool allows you to record a video stream (ROS sensor_msgs/Image topic)
+to a file. It relies on OpenCV's VideoWriter class. With the default options,
+it encodes the video as MPG, encapsulated in a AVI container at 15 fps,
+and produces a file called output.avi in the current directory.
+
+Subscribed Topics
+^^^^^^^^^^^^^^^^^
+ * **image** (sensor_msgs/Image): Image topic to save to file.
+
+Parameters
+^^^^^^^^^^
+ * **codec** (string, default: MJPG): The FOURCC identifier of the codec.
+ * **encoding** (string, default:"bgr8"): Encoding type of input image topic.
+ * **filename** (string, default: output.avi): Path and name of the
+   output video.
+ * **fps** (int, default: 15): Framerate of the video.
+ * **image_transport** (string, default: raw): Image transport to use.
+ * **queue_size** (int, default: 5): Size of message queue for each
+   synchronized topic. You may need to raise this if disparity processing
+   takes too long, or if there are significant network delays.

image_view/doc/conf.py

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+# Copyright 2024 Open Source Robotics Foundation, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# -*- coding: utf-8 -*-
+#
+# Configuration file for the Sphinx documentation builder.
+#
+# This file does only contain a selection of the most common options. For a
+# full list see the documentation:
+# http://www.sphinx-doc.org/en/master/config
+
+# -- Path setup --------------------------------------------------------------
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+import os
+import sys
+sys.path.insert(0, os.path.abspath('.'))
+
+
+# -- Project information -----------------------------------------------------
+
+project = 'image_view'
+copyright = '2008-2024, Open Source Robotics Foundation, Inc.'  # noqa
+author = 'Open Source Robotics Foundation, Inc.'
+
+# The short X.Y version
+version = ''
+# The full version, including alpha/beta/rc tags
+release = '3.2.1'
+
+
+# -- General configuration ---------------------------------------------------
+
+# If your documentation needs a minimal Sphinx version, state it here.
+#
+# needs_sphinx = '1.0'
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
+# ones.
+extensions = [
+    'sphinx.ext.autodoc',
+    'sphinx.ext.autosummary',
+    'sphinx.ext.doctest',
+    'sphinx.ext.coverage',
+    'sphinx_rtd_theme',
+]
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ['_templates']
+
+# The suffix(es) of source filenames.
+# You can specify multiple suffix as a list of string:
+#
+# source_suffix = ['.rst', '.md']
+source_suffix = '.rst'
+
+# The master toctree document.
+master_doc = 'index'
+
+# The language for content autogenerated by Sphinx. Refer to documentation
+# for a list of supported languages.
+#
+# This is also used if you do content translation via gettext catalogs.
+# Usually you set "language" from the command line for these cases.
+language = None
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+# This pattern also affects html_static_path and html_extra_path.
+exclude_patterns = []
+
+# The name of the Pygments (syntax highlighting) style to use.
+pygments_style = None
+
+
+# -- Options for HTML output -------------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+#
+html_theme = 'sphinx_rtd_theme'
+
+# Theme options are theme-specific and customize the look and feel of a theme
+# further.  For a list of options available for each theme, see the
+# documentation.
+#
+# html_theme_options = {}
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+html_static_path = []
+
+# Custom sidebar templates, must be a dictionary that maps document names
+# to template names.
+#
+# The default sidebars (for documents that don't match any pattern) are
+# defined by theme itself.  Builtin themes are using these templates by
+# default: ``['localtoc.html', 'relations.html', 'sourcelink.html',
+# 'searchbox.html']``.
+#
+# html_sidebars = {}
+
+
+# -- Options for HTMLHelp output ---------------------------------------------
+
+# Output file base name for HTML help builder.
+htmlhelp_basename = 'image_view_doc'
+
+
+# -- Options for LaTeX output ------------------------------------------------
+
+latex_elements = {
+    # The paper size ('letterpaper' or 'a4paper').
+    #
+    # 'papersize': 'letterpaper',
+
+    # The font size ('10pt', '11pt' or '12pt').
+    #
+    # 'pointsize': '10pt',
+
+    # Additional stuff for the LaTeX preamble.
+    #
+    # 'preamble': '',
+
+    # Latex figure (float) alignment
+    #
+    # 'figure_align': 'htbp',
+}
+
+
+# -- Options for manual page output ------------------------------------------
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [
+    (master_doc, 'image_view', 'image_view Documentation',
+     [author], 1)
+]
+
+
+# -- Options for Texinfo output ----------------------------------------------
+
+# Grouping the document tree into Texinfo files. List of tuples
+# (source start file, target name, title, author,
+#  dir menu entry, description, category)
+texinfo_documents = [
+    (master_doc, 'image_view', 'image_view Documentation',
+     author, 'image_view', 'ROS 2 components for visualising images.',
+     'Miscellaneous'),
+]
+
+
+# -- Options for Epub output -------------------------------------------------
+
+# Bibliographic Dublin Core info.
+epub_title = project
+
+# The unique identifier of the text. This can be a ISBN number
+# or the project homepage.
+#
+# epub_identifier = ''
+
+# A unique identification for the text.
+#
+# epub_uid = ''
+
+# A list of files that should not be packed into the epub file.
+epub_exclude_files = ['search.html']
+
+
+# -- Extension configuration -------------------------------------------------
+
+autoclass_content = 'both'
+
+autodoc_default_options = {
+    'members': True,  # document members
+    'undoc-members': True,  # also document members without documentation
+}