Computer Knowledge

Digital Image Processing

2,103 Questions

Digital image processing involves manipulating digital images through various algorithms to enhance their visual quality or extract information. Key concepts include noise reduction, high dynamic range imaging, color correction, and sharpening techniques. These concepts are essential for computer science exams and technical certifications.

Color management systemsNoise reduction techniquesHDR image combiningImage sharpening techniquesAlpha matting process

Digital Image Processing Questions

Multiple choice

Which image processing technique is commonly used for fruit ripeness assessment?

  1. Color Analysis

  2. Shape Analysis

  3. Texture Analysis

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Color Analysis is widely used for fruit ripeness assessment, as the color of fruits changes as they ripen.

Multiple choice

What is the function of the Color Picker tool in digital art software?

  1. Selecting Colors

  2. Adjusting Brightness

  3. Creating Gradients

  4. Applying Filters
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Color Picker tool allows artists to select colors from an image or a color palette. It is used to choose colors for painting, filling, and creating gradients.

Multiple choice

Which tool in digital art software is used to blend and soften colors?

  1. Smudge Tool

  2. Blur Tool

  3. Eraser Tool

  4. Dodge Tool
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Smudge Tool is used to blend and soften colors in digital art software. It allows artists to create smooth transitions between colors and create a painterly effect.

Multiple choice

Which of the following is NOT a common interaction technique used in information visualization?

  1. Zooming

  2. Panning

  3. Filtering

  4. Highlighting
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Highlighting is not a common interaction technique in information visualization. The options listed are all examples of common interaction techniques.

Multiple choice

What is the best way to edit a portrait in Photoshop?

  1. Adjust the exposure and white balance

  2. Crop the image to remove unwanted elements

  3. Sharpen the image to make it look more crisp

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

To edit a portrait in Photoshop, you can adjust the exposure and white balance, crop the image to remove unwanted elements, and sharpen the image to make it look more crisp.

Multiple choice

Which of the following is a common post-processing effect used to enhance the visuals in photorealistic game graphics?

  1. Color grading

  2. Motion blur

  3. Depth of field

  4. All of the above
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

Post-processing effects are often applied to enhance the visuals in photorealistic game graphics. These effects may include color grading to adjust the overall color palette, motion blur to simulate camera movement, and depth of field to focus on specific objects while blurring the background.

Multiple choice

How can chromatic aberration be corrected in architectural photography?

  1. Using a lens correction filter

  2. Adjusting the white balance

  3. Using a tripod

  4. Using a polarizing filter
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Chromatic aberration can be corrected in architectural photography by using a lens correction filter, which helps to reduce or eliminate the colored fringes that can appear around edges in the image.

Multiple choice

What is the term for the process of digitally manipulating and enhancing photographs?

  1. Photo Editing

  2. Photo Manipulation

  3. Photo Restoration

  4. Photo Retouching
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Photo editing is the process of digitally manipulating and enhancing photographs using software.

Multiple choice

Which color mapping technique is commonly used to visualize scalar fields?

  1. Rainbow color map

  2. Grayscale color map

  3. Jet color map

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Rainbow, grayscale, and jet color maps are all commonly used color mapping techniques for visualizing scalar fields. Rainbow color map uses a continuous spectrum of colors to represent scalar values, grayscale color map uses shades of gray, and jet color map uses a diverging color scheme.

Multiple choice

Which of the following is a commonly used isosurface extraction algorithm?

  1. Marching cubes

  2. Surface nets

  3. Dual contouring

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Marching cubes, surface nets, and dual contouring are all commonly used isosurface extraction algorithms. Marching cubes extracts isosurfaces by connecting the vertices of cubes that intersect the isosurface, surface nets generate isosurfaces as a network of connected triangles, and dual contouring extracts isosurfaces by constructing a dual complex of the scalar field.

Multiple choice

Which of the following is a type of rendering technique that divides the image into small squares (pixels) and then calculates the color of each pixel individually?

  1. Ray Tracing

  2. Rasterization

  3. Scanline Rendering

  4. Z-Buffering
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Rasterization is a type of rendering technique that divides the image into small squares (pixels) and then calculates the color of each pixel individually.

Multiple choice

Which editing technique involves adjusting the overall brightness and contrast of an image?

  1. Cropping

  2. Sharpening

  3. Color Correction

  4. Levels Adjustment
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Levels Adjustment is an editing technique that allows you to adjust the overall brightness, contrast, and gamma of an image. It is used to correct exposure problems, enhance the dynamic range, and improve the overall tonal balance of the image.

Multiple choice

Which editing technique involves selectively adjusting the brightness, contrast, and color of specific areas of an image?

  1. Cropping

  2. Sharpening

  3. Color Correction

  4. Dodge and Burn
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Dodge and Burn is an editing technique that involves selectively lightening (dodging) or darkening (burning) specific areas of an image to enhance the overall look and feel of the photo. It is often used to create a more dramatic effect, emphasize certain elements, or correct exposure problems.

Multiple choice

Which editing technique involves removing unwanted objects or elements from an image?

  1. Cropping

  2. Sharpening

  3. Color Correction

  4. Content-Aware Fill
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Content-Aware Fill is an editing technique that allows you to remove unwanted objects or elements from an image by filling the area with content that is generated from the surrounding pixels. This technique is often used to remove blemishes, power lines, or other distracting elements from a photo.

Multiple choice

Which of the following is not a global illumination method?

  1. Ray Tracing

  2. Radiosity

  3. Photon Mapping

  4. Rasterization
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Rasterization is a technique used to convert 2D or 3D objects into a 2D image. It is not a global illumination method.