Digital Art Lesson 7: Color Models
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Questions and Answers

Which three colors are the base colors of the RGB color model?

  • Red, Yellow, Blue
  • Red, Green, Blue (correct)
  • Cyan, Magenta, Yellow
  • Red, Green, Yellow

    • What does saturation refer to in the HSL color model?

  • The lightness of the color
  • The brightness of the color
  • The pigment color
  • The intensity of the color (correct)

    • In the hexadecimal color model, what does the first pair of characters represent?

  • Blue value
  • Brightness
  • Green value
  • Red value (correct)

    • How does the alpha channel affect raster images?

    <p>It varies the opacity of a color</p> Signup and view all the answers

    Which color model is especially useful for 3D computer-generated models?

    <p>HSL</p> Signup and view all the answers

    What is the maximum value for each color in the RGB model?

    <p>255</p> Signup and view all the answers

    What does the HSL model allow a computer to adjust while keeping hue and saturation unchanged?

    <p>Luminescence</p> Signup and view all the answers

    What is another name for the HSL color model?

    <p>Hue, Saturation, and Brightness</p> Signup and view all the answers

    What is the primary purpose of interpolation in image processing?

    <p>To average the color of surrounding pixels for new pixel creation</p> Signup and view all the answers

    What is the recommended resolution for images intended for print publication?

    <p>300 dpi</p> Signup and view all the answers

    If an image at 200 dpi is sized to two inches square without resampling, what will be its new resolution?

    <p>100 dpi</p> Signup and view all the answers

    How many total pixels would an image that is 5 inches wide at 200 dpi contain?

    <p>1,000,000 pixels</p> Signup and view all the answers

    What happens to an image when resizing without resampling?

    <p>Image clarity may decrease due to resolution changes</p> Signup and view all the answers

    What function does a chroma screen serve in weather reporting?

    <p>It digitally replaces the blank screen with imagery.</p> Signup and view all the answers

    What is the significance of knowing the final size of an artwork in digital design?

    <p>It ensures proper display on devices or platforms</p> Signup and view all the answers

    Why is using a masking color like white not advisable for chroma screens?

    <p>It would make all white items in the image transparent.</p> Signup and view all the answers

    Which resolution measurement is equivalent to the number of dots or pixels along the axes of an image?

    <p>Dots per inch (dpi) or pixels per inch (ppi)</p> Signup and view all the answers

    How does a vector image differ from a raster image in its structure?

    <p>A vector image is composed of mathematical definitions.</p> Signup and view all the answers

    What is the role of resampling when resizing an image?

    <p>To add or remove pixels as needed for resolution maintenance</p> Signup and view all the answers

    What is a primary disadvantage of vector images compared to raster images?

    <p>Vector images need extensive CPU resources to render.</p> Signup and view all the answers

    What occurs to a bitmap image when it is enlarged?

    <p>The pixels spread out and create holes.</p> Signup and view all the answers

    What must happen for a vector image to be displayed on a device?

    <p>The software must rasterize the image.</p> Signup and view all the answers

    What should designers consider when working with images on handheld devices?

    <p>The limits and capabilities of the display device.</p> Signup and view all the answers

    What is one of the main advantages of a vector image?

    <p>It can be resized infinitely without loss of clarity.</p> Signup and view all the answers

    What should be done after moving the word 'ball' by one space?

    <p>Leave the Text dialog box open until instructed otherwise.</p> Signup and view all the answers

    After modifying the font size to 48, what is the next step?

    <p>Click the ‘Close’ button on the Font dialog box.</p> Signup and view all the answers

    What happens to the text after closing the Text dialog box?

    <p>The text becomes part of the image and cannot be edited.</p> Signup and view all the answers

    What is the outline size for the icon size of 48 x 48?

    <p>2</p> Signup and view all the answers

    What is the visible light?

    <p>The portion of light visible to humans.</p> Signup and view all the answers

    In the RGB color model, which colors are the base colors?

    <p>Red, green, and blue.</p> Signup and view all the answers

    What is a raster image made of?

    <p>Pixels or dots.</p> Signup and view all the answers

    Which of the following describes the alpha channel?

    <p>A channel that varies the opaqueness of a color.</p> Signup and view all the answers

    What is the purpose of changing the foreground color to light red?

    <p>To reduce the thickness of previous dark-red lines.</p> Signup and view all the answers

    Which tool is used to paint single pixels of color?

    <p>Brush Tool</p> Signup and view all the answers

    What color is assigned to the background using the RGB values 0, 0, 0?

    <p>Black</p> Signup and view all the answers

    What is the outcome of clicking the Clear button in the Edit Icon dialog box?

    <p>It deletes the current image, leaving a blank canvas.</p> Signup and view all the answers

    What should be entered in the Size text box to make the outline of the circle four pixels thick?

    <p>4</p> Signup and view all the answers

    What is indicated by clicking the Outlined Filled button for the Ellipse Tool?

    <p>The circle will have both outline and fill.</p> Signup and view all the answers

    What text should be entered in the Text dialog box to complete the icon creation?

    <p>Click</p> Signup and view all the answers

    Why is adding dark-red lines next to the light-red pixel beneficial?

    <p>It creates a balanced look to the border.</p> Signup and view all the answers

    What is the main purpose of interpretation in image processing?

    <p>To enhance an enlarged image by refining the space between pixels</p> Signup and view all the answers

    What is resolution commonly measured in?

    <p>Dots per inch</p> Signup and view all the answers

    Which term describes the process of adding or removing pixels to create a new image?

    <p>Resampling</p> Signup and view all the answers

    What distinguishes pixel art from other digital arts?

    <p>Each pixel is intentionally modified to create an image</p> Signup and view all the answers

    What happens to an image when the resolution is increased from 100 dpi?

    <p>The image appears sharper and more defined</p> Signup and view all the answers

    Which color model is typically used for digital art?

    <p>RGB (Red, Green, Blue)</p> Signup and view all the answers

    If a color has RGB values of 128, 128, 128, what color does it represent?

    <p>Gray</p> Signup and view all the answers

    What describes the main function of a chroma screen in image processing?

    <p>To isolate a subject by removing a specific color</p> Signup and view all the answers

    Study Notes

    Digital Art Lesson 7

    • Digital art involves creating images using shapes and colors, combining them to form composite images
    • Images can be raster or vector
    • Visible light is part of the electromagnetic spectrum, humans can see a portion of it (red, orange, yellow, green, blue, indigo, violet).
    • Colors are different wavelengths of energy. Red has the longest wavelength visible to humans, and violet has the shortest.
    • Longer wavelengths (beyond red) are infrared, while wavelengths shorter (than violet) are ultraviolet.

    Color Models

    • Color models define how colors are mixed to create a spectrum of colors
    • RGB (Red, Green, Blue) is common in digital design; colors are combined to produce any color on a computer screen. Values range from 0 to 255 for each color.
    • HSL (Hue, Saturation, Luminosity) adjusts color using hue (pigment), saturation (amount of color), and luminosity (brightness).
    • Hexadecimal models represent colors using a series of six-digit alphanumeric values; each pair represents red, green and blue components.

    Image Types

    • Raster images are made of pixels (dots) with specific colors and locations, forming a bitmap. Location and color of each pixel is important. Rasterized images are formed by storing the color of each pixel in the image
    • Vector images are based on mathematical formulas for lines, shapes, and fills, not on the individual color values of dots. They are infinitely scalable without losing quality.
    • Raster images are easier for simple designs, vector images are more versatile for scaling and modifying.

    Image Sizing and Resampling

    • To get the image size right, designers need to know the final dimensions
    • Resolution is measured in dpi (dots per inch) or ppi (pixels per inch). It refers to the image’s clarity
    • Dithering, a process used in image interpolation, is how software averages colors of touching pixels when resizing.
    • Interpolation is used when resizing to prevent loss of image clarity
    • Resampling adds or removes pixels while maintaining quality during image resizing

    Pixel Art

    • Pixel art is digital art that uses individual pixels to create images.
    • Pixel art is used to create icons in software.

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    Description

    Explore the fundamentals of color models in digital art, focusing on RGB, HSL, and hexadecimal systems. Understand how colors are perceived through wavelengths and how they combine to create a spectrum. This quiz reinforces key concepts essential for mastering digital image creation.

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