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 technique involves applying various effects, such as filters or textures, to enhance the visual impact of a collage?

  1. Texturing

  2. Filtering

  3. Adjusting

  4. Transforming
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Filtering allows artists to apply pre-defined or custom effects to the collage, creating unique visual styles and atmospheres.

Multiple choice

Which technique involves creating a seamless transition between two images by gradually blending their edges?

  1. Fading

  2. Feathering

  3. Smudging

  4. Blurring
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Feathering gradually blends the edges of two images, creating a smooth and seamless transition between them.

Multiple choice

Which rendering technique uses a series of samples to estimate the color of a pixel, resulting in higher quality images?

  1. Ray Tracing

  2. Rasterization

  3. Path Tracing

  4. Voxel-Based Rendering
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Path tracing is a rendering technique that uses a series of samples to estimate the color of a pixel by simulating the path of light rays through a scene. It produces higher quality images compared to other techniques, but it is also more computationally expensive.

Multiple choice

Which of the following is not a common texture mapping technique?

  1. UV Mapping

  2. Bump Mapping

  3. Displacement Mapping

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

Parallax Mapping is not a common texture mapping technique. It is a more advanced technique that simulates the displacement of the surface based on the angle of the viewer.

Multiple choice

Which of the following is not a type of texture filter?

  1. Bilinear Filtering

  2. Trilinear Filtering

  3. Anisotropic Filtering

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

Mipmapping is not a texture filter. It is a technique used to reduce texture aliasing by generating multiple levels of detail for a texture.

Multiple choice

Which of the following is not a type of texture blending mode?

  1. Add

  2. Multiply

  3. Subtract

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

Overlay is not a type of texture blending mode. It is a type of layer blending mode that is used in image editing software.

Multiple choice

What is adaptive optics?

  1. A technique for correcting distortions in telescope images

  2. A technique for increasing the resolution of telescope images

  3. A technique for reducing the cost of telescope construction

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Adaptive optics is a technique for correcting distortions in telescope images caused by atmospheric turbulence.

Multiple choice

What is the technique used to optimize the rendering process by dividing the scene into smaller regions and rendering them independently?

  1. Rasterization

  2. Ray Tracing

  3. Tessellation

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

Tiling is a technique used to optimize rendering by dividing the scene into smaller regions, called tiles, and rendering them independently, improving performance and reducing rendering time.

Multiple choice

Which color grading technique involves adjusting the overall color palette of a film to create a specific mood or atmosphere?

  1. Color correction

  2. Color enhancement

  3. Color grading

  4. Color balancing
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Color grading is a post-production technique used in digital filmmaking to adjust the overall color palette of a film. It involves manipulating the colors, contrast, and saturation to create a specific mood, atmosphere, or visual style.

Multiple choice

Which of the following is a common technique for reducing the computational cost of hair rendering?

  1. Level-of-detail techniques

  2. Adaptive rendering

  3. Precomputed lighting

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

Level-of-detail techniques, adaptive rendering, and precomputed lighting are all commonly used techniques for reducing the computational cost of hair rendering.

Multiple choice

Which of the following is a common type of plasma processing technique used for etching materials?

  1. Reactive Ion Etching (RIE)

  2. Chemical Vapor Deposition (CVD)

  3. Physical Vapor Deposition (PVD)

  4. Rapid Thermal Annealing (RTA)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Reactive Ion Etching (RIE) is a plasma processing technique used to etch materials by bombarding the surface with reactive ions, typically in the presence of a reactive gas.

Multiple choice

Which type of image processing technique is commonly used to enhance the contrast of an image?

  1. Histogram equalization

  2. Edge detection

  3. Image segmentation

  4. Radiometric correction
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Histogram equalization is a technique used to adjust the distribution of pixel values in an image, thereby enhancing the contrast and making features more distinguishable.

Multiple choice

What is the process of assigning labels to different regions in an image called?

  1. Image classification

  2. Image segmentation

  3. Image enhancement

  4. Image registration
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Image classification involves assigning labels or classes to different regions in an image based on their spectral or textural characteristics.

Multiple choice

What is the process of correcting geometric distortions in an image referred to as?

  1. Image registration

  2. Image rectification

  3. Image enhancement

  4. Image classification
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Image registration involves aligning multiple images of the same area taken from different perspectives or at different times, correcting for geometric distortions.

Multiple choice

Which type of image processing technique is used to detect linear features, such as roads or rivers, in an image?

  1. Edge detection

  2. Image segmentation

  3. Image classification

  4. Image enhancement
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Edge detection algorithms are used to identify and extract linear features in an image by detecting sharp changes in pixel values.