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 filter is commonly used in landscape photography to reduce glare and reflections?

  1. Polarizing Filter

  2. Neutral Density Filter

  3. Ultraviolet Filter

  4. Infrared Filter
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Polarizing filters are often used in landscape photography to reduce glare and reflections from water surfaces, foliage, and other reflective surfaces, enhancing the overall clarity and contrast of the image.

Multiple choice

Which of the following is NOT a common post-processing technique used in street photography?

  1. Cropping

  2. Color correction

  3. HDR blending

  4. Noise reduction
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

HDR blending is not typically used in street photography because it can make the image look too artificial and unrealistic.

Multiple choice

Which of the following is NOT a common color correction technique used in street photography?

  1. White balance adjustment

  2. Exposure adjustment

  3. Contrast adjustment

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

Exposure adjustment is not typically used in street photography because it can make the image look too bright or too dark.

Multiple choice

Which of the following is NOT a common sharpening technique used in street photography?

  1. Unsharp mask

  2. High pass filter

  3. Median filter

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

Gaussian blur is not typically used in street photography because it can make the image look too soft and blurry.

Multiple choice

Which of the following is NOT a common black and white conversion technique used in street photography?

  1. Desaturation

  2. Channel mixer

  3. Levels adjustment

  4. Curves adjustment
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Levels adjustment is not typically used in black and white conversion because it can make the image look too contrasty.

Multiple choice

Which of the following is a common technique used to optimize the performance of real-time graphics systems?

  1. Level of Detail (LOD)

  2. Occlusion Culling

  3. Dynamic Lighting

  4. Anti-Aliasing
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Level of Detail (LOD) is a technique used to reduce the geometric complexity of objects based on their distance from the viewer, improving performance.

Multiple choice

Which of the following is a common technique used to reduce aliasing in real-time graphics?

  1. Supersampling

  2. Multisampling

  3. Anisotropic Filtering

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

Multisampling is a technique used to reduce aliasing by sampling multiple times per pixel and blending the results.

Multiple choice

Which of the following is NOT a common editing technique used in jewelry photography?

  1. Adjusting color and contrast

  2. Removing unwanted reflections and blemishes

  3. Applying filters and effects

  4. Cropping and resizing the image
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

While adjusting color, contrast, removing blemishes, and cropping/resizing are common editing techniques, applying filters and effects is generally not considered a standard practice in professional jewelry photography.

Multiple choice

Which of the following is NOT a common editing technique used in event photography?

  1. Color correction

  2. Exposure adjustment

  3. Cropping and resizing

  4. Adding filters and effects
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Adding filters and effects is not a common editing technique used in event photography because it can make the images look unnatural and over-processed. Color correction, exposure adjustment, and cropping and resizing are all more common techniques for improving the look of event photos.

Multiple choice

How does AI help to reduce noise and improve the clarity of underwater images?

  1. By applying denoising algorithms

  2. By enhancing edges and textures

  3. By correcting color distortion

  4. By stabilizing shaky footage
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

AI-powered denoising algorithms effectively remove noise from underwater images, resulting in clearer and sharper images with reduced graininess.

Multiple choice

What is the role of AI in color correction and white balance adjustment for underwater images?

  1. It automatically adjusts color temperature

  2. It corrects color casts caused by underwater conditions

  3. It enhances the vibrancy and saturation of colors

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

AI plays a crucial role in color correction and white balance adjustment by automatically adjusting color temperature, correcting color casts, and enhancing the vibrancy and saturation of colors, resulting in more natural and visually appealing underwater images.

Multiple choice

How does AI assist in enhancing the sharpness and detail of underwater images?

  1. By applying sharpening filters

  2. By reducing image noise

  3. By increasing the contrast between objects

  4. Both A and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

AI combines the application of sharpening filters and increases the contrast between objects to enhance the sharpness and detail of underwater images, making them appear more crisp and well-defined.

Multiple choice

Which AI technique is used to stabilize shaky underwater footage, reducing motion blur?

  1. Image stabilization

  2. Motion compensation

  3. Temporal filtering

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

AI utilizes a combination of image stabilization, motion compensation, and temporal filtering techniques to effectively stabilize shaky underwater footage, reducing motion blur and creating smoother and more watchable videos.

Multiple choice

How does AI assist in removing unwanted objects or elements from underwater images?

  1. By identifying and isolating unwanted objects

  2. By seamlessly blending the surrounding area to fill the gap

  3. By automatically adjusting the color and tone of the surrounding area

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

AI combines the capabilities of identifying and isolating unwanted objects, seamlessly blending the surrounding area to fill the gap, and automatically adjusting the color and tone of the surrounding area to effectively remove unwanted objects or elements from underwater images.

Multiple choice

Which AI technique is commonly used to enhance the sharpness and detail of underwater images?

  1. Edge detection

  2. Image sharpening

  3. Histogram equalization

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

Image sharpening is an AI technique that enhances the sharpness and detail of underwater images by accentuating the edges of objects and reducing blur.