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Questions and Answers
What is the basic unit that makes up a digital image?
Every image file consists of thousands of pixels, which are large enough to be easily distinguished by the naked eye.
False
An image that is taller than it is wide is referred to as _______ orientation.
portrait
What is the purpose of editing an image according to the introduction?
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You need to be a professional to learn image editing.
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What is usually listed first when stating the dimensions of an image?
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What happens to image quality when you increase the size of a low-resolution image?
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What is image degradation?
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The most commonly recommended file formats for images are _____ and _____.
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Which of the following statements is true about uncompressed image formats?
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You should always edit the original image file to maintain quality.
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GIF files are commonly used for _____ images online.
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Which of the following is a recommended practice when working with image files?
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What happens to the quality of an image when it is enlarged beyond its original size?
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The image file format _____ is commonly used for simple animated images online.
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Which of the following file formats does NOT use compression?
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Higher quality settings in image compression will lead to a smaller file size.
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An image file can lose quality when resized without care.
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What term is used to describe an image that is wider than it is tall?
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Every image file is made up of many tiny units called __________.
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What is typically stated first when giving the dimensions of an image?
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All images on computers and smartphones originated from digital image files.
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How many pixels wide and tall is an image with dimensions 450px by 300px?
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Study Notes
Image Editing Basics
- Every digital image is composed of pixels, which are minuscule coloured squares.
- Dimensions refer to the width and height of an image, measured in pixels (px).
- Landscape orientation is when an image is wider than tall.
- Portrait orientation is when an image is taller than wide.
- Resolution determines the level of detail in an image, influencing print quality and resizing.
- Higher resolution images have more detail and maintain quality when resized larger.
- Lossy compression reduces file size by removing image information, resulting in lower quality.
- JPEG and PNG are recommended file formats for general image editing due to their balance of quality and file size.
- GIF files are commonly used for simple online animations.
- RAW and BMP formats are uncompressed, offering high-quality storage but resulting in larger file sizes.
- Image degradation occurs when repeatedly editing and saving an image, especially with lossy compression, leading to quality reduction.
- To preserve original image quality, always create and maintain an unedited copy of the source file before making any edits.
Introduction to Image Editing
- Image editing is a simple and valuable skill.
- You can easily enhance images with basic editing techniques using photo editing software.
Fundamentals of Digital Images
- Images are composed of pixels, small square units of color.
- Dimensions refer to image width and height, measured in pixels.
- Resolution determines image detail and quality. High resolution allows for larger sizes without blurring.
- Image file formats like JPEG, PNG, and GIF are used for different purposes.
Image File Compression
- Image compression reduces file size.
- Lossy compression removes image data, enabling smaller file sizes but sacrificing quality.
- The quality level determines how much data is removed.
- Lossless compression retains all information in the image, resulting in larger files.
Recommended File Formats
- JPEG (Joint Photographic Experts Group): Offers high compression and is ideal for web images and photography.
- PNG (Portable Network Graphics): Supports lossless compression, preserving image quality, and transparent backgrounds.
Other File Formats
- GIF (Graphics Interchange Format): Typically used for animations, but can be static images.
- RAW: Uncompressed format used by professional cameras for high-quality images.
- BMP (Bitmap): Uncompressed, large file sizes.
Image Degradation and Keeping Originals
- Image degradation is a gradual loss of quality during editing.
- It's crucial to maintain original, unedited files to prevent degradation.
- Always create copies of original images before editing to avoid loss.
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Description
Test your knowledge of the fundamental concepts of image editing in this quiz. From understanding pixels and dimensions to file formats and resolution, you will learn important principles that are crucial for effective image manipulation. Perfect for beginners looking to solidify their grasp of digital images.
