Old Media Images: photos, slide projection, illustations, maps, graphics ...
Lesson 3: Images
Instuctors of online material have a tremendous source of free visual content available on the web. Care must be exercised when using copyrighted images. Fair use copyright law is not always easy to apply. By always using your own work and free sources, you can avoid costly litigation.Free Image-Based Content Sources
- Unsplash
- pixabay (Below is an image sourced from pixabay by user user:ninocare )
Look below the photo to learn about image formats and screen capture tools.
Pixels vs. Vectors
All images are based on two diffent types of technology, pixels and vectors. Pixels look bad if you zoom in very close and vectors look good
no matter how deeply you zoom in. Photographs are created and delivered as pixels. Graphics can be created with pixels or vectors, but are almost
always exported as pixels. The two most commonly used pixel based formats are .jpg and .png
Vector images on the web are rare. But they are should not; they are perfectly suited for the web as they have many, many benefits over pixel based images. SVG is a very amazing file format that uses xml text to describe images and has all of the benefits of vectors and text.
Here is a short youTube video explaining the differences between pixels and vectors. Lesson 4: Audio