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 (D)</p> Signup and view all the answers

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

<p>HSL (D)</p> Signup and view all the answers

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

<p>255 (C)</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 (A)</p> Signup and view all the answers

What is another name for the HSL color model?

<p>Hue, Saturation, and Brightness (C)</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 (A)</p> Signup and view all the answers

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

<p>300 dpi (C)</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 (D)</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 (B)</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 (D)</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. (B)</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 (B)</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. (A)</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) (D)</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. (C)</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 (C)</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. (B)</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. (A)</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. (B)</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. (A)</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. (C)</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. (A)</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. (A)</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. (C)</p> Signup and view all the answers

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

<p>2 (D)</p> Signup and view all the answers

What is the visible light?

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

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

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

What is a raster image made of?

<p>Pixels or dots. (C)</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. (D)</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. (C)</p> Signup and view all the answers

Which tool is used to paint single pixels of color?

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

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

<p>Black (D)</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. (A)</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 (B)</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. (B)</p> Signup and view all the answers

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

<p>Click (B)</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. (A)</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 (C)</p> Signup and view all the answers

What is resolution commonly measured in?

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

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

<p>Resampling (D)</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 (D)</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 (B)</p> Signup and view all the answers

Which color model is typically used for digital art?

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

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

<p>Gray (D)</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 (C)</p> Signup and view all the answers

Flashcards

Interpolation

Refining the space between pixels by averaging the color of surrounding pixels.

RGB color model

A color model that combines red, green, and blue to create various colors, with values ranging from 0 to 255 for each color.

HSL color model

A color model that uses hue, saturation, and luminescence to define colors, allowing for subtle variations and simulating lighting effects.

Resolution

A measure of the sharpness or clarity of an image, measured in dots per inch (dpi) or pixels per inch (ppi).

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Hexadecimal color model

A method for representing colors in RGB where each color component is expressed using a combination of letters and numbers.

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Dots Per Inch (DPI) or Pixels Per Inch (PPI)

The number of dots or pixels along the horizontal and vertical axes of an image.

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Resampling

Creating a new image by adding or removing pixels to maintain resolution when resizing.

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Raster image

A type of digital image composed of individual pixels arranged in a grid, where each pixel has a specific color and position.

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Image Specifications

A set of specifications for the size and resolution of an image, such as for game logos or icons.

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Bitmap

A digital image stored as a grid of pixels, with each pixel defined by its color and position.

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Alpha channel

A feature in some bitmap formats that allows control over the transparency of colors in an image.

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Masking color

A specific shade of color that is made transparent in a bitmap image, allowing for selective transparency.

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Additive color model

A color model used for displaying colors on computer screens, using the primary colors red, green, and blue.

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Vector Image

A type of image created using mathematical definitions of lines and fills, rather than pixel data.

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Rasterization

The process of converting a vector image into a bitmap image for display.

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Image Enlargement

The process of creating a larger image from a smaller one by increasing the number of pixels.

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CPU (Central Processing Unit)

The central processing unit of a computer, responsible for calculations and tasks.

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Bitmap Image

A type of image composed of a grid of pixels, each with its own color value.

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Hexadecimal color number

A color representation using hexadecimal values. Each pair of hexadecimal characters (0-9 and A-F) represents a color channel: red (RR), green (GG), and blue (BB). FFFF00 represents yellow, with maximum red and green, and no blue.

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Balanced look

A design technique to create a balanced visual appearance by using symmetrically placed elements, like lines or shapes, around a center point.

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Brush Tool

A digital tool for creating lines, shapes, and other graphics. It uses a pixel-based approach, allowing for precise control over the image.

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Foreground color

An image editing function that allows you to change the foreground color. This color is used to create new elements or lines.

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Ellipse tool

A solid shape with a distinct boundary. It can be filled with a background color or left empty.

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Canvas

A rectangular area within a digital editing program where you can create and edit images.

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Border

A visual design element that creates a clear border around an object or image, defining its boundaries.

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Icon

The digital representation of an image, consisting of individual pixels arranged in a grid.

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Dithers

Holes that appear in an image when the pixels are enlarged.

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Pixel Art

Digital artwork where each pixel is meticulously placed and colored to create detailed images. It's often used in retro games and stylized artwork.

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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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