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SU1.1 - Creating Digital Graphics

⏱️ Do It Now

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Lesson 1 - Summer 1 - Digital Graphics


Copy this into OneNote and complete the questions

⏱️ Do It Now Activity

Answer the following questions:
  1. Identify the name of the memory from where the CPU fetches instructions
  2. Explain what is meant by the term volatile
  3. Describe how data is read from the surface of an optical disk

🎯 Learning Objectives

  • LO1:We are learning about the properties of digital images
  • LO2:We are learning how to prepare a digital image file for editing
  • LO3:We are learning how to apply specific tools in the production of a digital image

📝 Activity 1 - Reading and Comprehension

Over the next few slides you will learn about the properties of digital images; how they are created and the distinction between different image file types.


Copy the table below into OneNote and use the next few slides in this section to answer the questions.


📝 Activity 1 - Reading and Comprehension

  • Explain the difference between a JPEG and a PNG?
  • When working with a digial editing program, how is the user able to place one part of an image over another?
  • What is meant by exporting, why must it be done with a finished project?

📖 Digital Graphics: File Types

🖼️ JPEG vs PNG

  • Images can be saved in different file formats, such as JPEG and PNG. What is a file format?
  • JPEG files are compressed and usually have smaller file sizes, but lose some quality. What does this mean?
  • PNG files keep full quality and can have transparent backgrounds. Why is this useful?
  • JPEG does not support transparency, but PNG does. What is transparency?

JPEG vs PNG comparison
A file format is the type of file used to store an image. Different formats store images in different ways.
JPEG uses lossy compression. This means some image data is removed to make the file smaller, which can reduce quality.
PNG uses lossless compression, so no image quality is lost. This makes it better for logos, graphics, and images that need to stay sharp.
Transparency means parts of the image can be invisible. This allows images to be placed on top of others without a white box around them.

📖 Digital Graphics: Layers

🧩 Working with Layers

  • Image editing programs use layers to build up a final image. What is a layer?
  • Each layer can contain a different part of the image. Why is this useful?
  • Layers can be moved, reordered, and edited separately. How does this help the user?

Layers diagram
A layer is like a transparent sheet. You can place images on different layers and stack them.
It allows users to edit one part of an image without changing the others.
You can place one image on top of another by moving its layer above the others.

📖 Digital Graphics: Exporting

💾 Saving and Exporting

  • When working on a project, files are often saved in a project format. What is a project file?
  • Finished work must be exported into a common file type like JPEG or PNG. What does exporting mean?
  • Exporting prepares the file so it can be shared or viewed by others. Why is this important?

Exporting image
A project file keeps all layers and editing information so you can continue working later.
Exporting means saving the finished work into a format that others can open easily.
Without exporting, others may not be able to view the image properly because they don't have the editing software.