Computer Knowledge

Digital Image Processing

2,042 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

How does the use of alternative text (alt text) contribute to the accessibility of Indian literature images for individuals with visual impairments?

  1. Alt text provides a written description of the image, enabling individuals with visual impairments to understand its content.

  2. Alt text helps search engines index images, improving the visibility of Indian literature websites.

  3. Alt text enhances the overall aesthetics of Indian literature websites.

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

Alt text primarily serves the purpose of providing a textual description of images, making them accessible to individuals with visual impairments.

Multiple choice

Which post-processing technique is often used in event photography to enhance the colors and contrast of images?

  1. White balance adjustment

  2. Exposure adjustment

  3. Color correction

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

Color correction is often used in event photography to enhance the colors and contrast of images, as it allows the photographer to adjust the hue, saturation, and luminosity of the colors in the image.

Multiple choice

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

  1. Cropping

  2. Adjusting exposure and contrast

  3. Applying filters

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

Adding watermarks is not typically considered a common post-processing technique in sports photography, as it is more commonly used for protecting images from unauthorized use.

Multiple choice

How can you achieve a consistent white balance across a series of images taken in different lighting conditions?

  1. Use a custom white balance setting for each image.

  2. Use the Auto White Balance setting and adjust the white balance in post-processing.

  3. Shoot in RAW format and adjust the white balance during post-processing.

  4. Use a white balance card or gray card to calibrate the camera's white balance.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Shooting in RAW format captures more color information, allowing you to adjust the white balance more precisely during post-processing, ensuring consistency across images taken in different lighting conditions.

Multiple choice

What is matting?

  1. A process of placing a border of material around a photograph

  2. A process of mounting a photograph to a backing board using an adhesive

  3. A process of applying a thin, transparent plastic film to the surface of a photograph

  4. A process of framing a photograph
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Matting is a process of placing a border of material around a photograph to enhance its appearance and protect it from damage.

Multiple choice

Which resolution is important for capturing fine details and distinguishing between small objects in an image?

  1. Spatial Resolution

  2. Spectral Resolution

  3. Radiometric Resolution

  4. Temporal Resolution
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Spatial resolution is crucial for capturing fine details and distinguishing between small objects in an image, as it determines the level of detail that can be observed.

Multiple choice

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

  1. Cropping and framing

  2. Adjusting exposure and contrast

  3. Converting to black and white

  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 post-processing technique used in street photography, as it can be seen as manipulating the image and detracting from its authenticity.

Multiple choice

Which of the following is NOT a common type of adjustment layer in post-processing software?

  1. Curves

  2. Levels

  3. Hue/Saturation

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

Sharpening is not a type of adjustment layer, but rather a specific tool or filter used to enhance the sharpness of an image.

Multiple choice

Which of the following is NOT a common type of filter used in post-processing software?

  1. Blur

  2. Sharpen

  3. Noise Reduction

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

Vignette is not a type of filter, but rather a specific effect that can be applied to an image to darken the edges and draw attention to the center.

Multiple choice

Which of the following is NOT a common type of transformation tool found in post-processing software?

  1. Crop

  2. Resize

  3. Rotate

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

Perspective Correction is not a common transformation tool found in post-processing software. It is a specialized tool used to correct the perspective of an image, such as when an object appears to be tilted or distorted.

Multiple choice

Which of the following is NOT a common type of color correction tool found in post-processing software?

  1. White Balance

  2. Exposure

  3. Contrast

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

Exposure is not a color correction tool, but rather a tool used to adjust the overall brightness of an image.

Multiple choice

Which of the following is NOT a common type of adjustment tool found in post-processing software?

  1. Levels

  2. Curves

  3. Hue/Saturation

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

Sharpening is not an adjustment tool, but rather a specific tool or filter used to enhance the sharpness of an image.

Multiple choice

Which of the following is NOT a common type of filter used in post-processing software?

  1. Blur

  2. Sharpen

  3. Noise Reduction

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

Vignette is not a type of filter, but rather a specific effect that can be applied to an image to darken the edges and draw attention to the center.

Multiple choice

Which of the following is NOT a common type of transformation tool found in post-processing software?

  1. Crop

  2. Resize

  3. Rotate

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

Perspective Correction is not a common transformation tool found in post-processing software. It is a specialized tool used to correct the perspective of an image, such as when an object appears to be tilted or distorted.

Multiple choice

What is a gray card?

  1. A card that is used to calibrate the white balance of a camera.

  2. A card that is used to adjust the brightness of a camera.

  3. A card that is used to adjust the contrast of a camera.

  4. A card that is used to adjust the saturation of a camera.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A gray card is a card that is used to adjust the brightness of a camera. It is a gray card that is placed in front of the camera lens, and the camera is then adjusted so that the card appears gray in the image.