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 physics universe and space science launching of an artificial satellites around the earth launching of satellite india’s space programmes

What should be done to successfully convert the format of an image from BMP to JPEG ?

  1. Compress the file

  2. Rename the image

  3. Use the save as command

  4. Change the image file extension
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Open paint and then open your BMP file, Next click on file and then save as. In newer version of paint that have the ribbon interface click on the title menu icon, in the Save As type dropdown choose the JPEG as the file format.

Multiple choice physics motion and measurement measuring length measurement of small and large distances measurement of distance

Parallax method is based on which of the following principle?

  1. Disparity

  2. Lutz Kelker bias

  3. Trilateration

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

Distance measurement by parallax is a special case of the principle of triangulation, which states that one can solve for all the sides and angles in a network of triangles if, in addition to all the angles in the network, the length of at least one side has been measured. Thus, the careful measurement of the length of one baseline can fix the scale of an entire triangulation network. In parallax, the triangle is extremely long and narrow, and by measuring both its shortest side (the motion of the observer) and the small top angle (always less than 1 arcsecond leaving the other two close to 90 degrees), the length of the long sides can be determined.

Multiple choice

Which of these post-processing techniques is commonly used to enhance the overall look and feel of a wedding photo?

  1. Color Grading

  2. Sharpening

  3. Noise Reduction

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

Color grading, sharpening, and noise reduction are all essential post-processing techniques used to improve the visual quality and appeal of wedding photos.

Multiple choice

Which of these post-processing techniques is commonly used to reduce noise and grain in wedding photos taken in low-light conditions?

  1. Color Correction

  2. Sharpening

  3. Noise Reduction

  4. White Balance Correction
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Noise reduction is a crucial post-processing technique used to minimize noise and grain in wedding photos, particularly those taken in low-light conditions or with high ISO settings.

Multiple choice

Which post-processing technique involves removing unwanted objects or blemishes from a wedding photo without compromising the overall composition?

  1. Color Grading

  2. Object Removal

  3. Noise Reduction

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

Object removal involves using specialized tools to seamlessly remove unwanted objects or blemishes from a wedding photo, such as stray hairs, dust spots, or distracting background elements. This technique helps to create a clean and polished final image.

Multiple choice

Which filter is commonly used to reduce reflections and glare from non-metallic surfaces?

  1. Polarizing filter

  2. Neutral density filter

  3. Graduated neutral density filter

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

Polarizing filters are designed to reduce reflections and glare from non-metallic surfaces, such as water, glass, and foliage, by selectively blocking certain wavelengths of light.

Multiple choice

Which filter is commonly used to create a soft-focus effect?

  1. Diffusion filter

  2. Star filter

  3. Graduated neutral density filter

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

Diffusion filters are designed to create a soft-focus effect by scattering light as it passes through the filter, resulting in a dreamy or ethereal look.

Multiple choice

Which filter is commonly used to enhance the contrast of the image?

  1. Contrast filter

  2. Neutral density filter

  3. Graduated neutral density filter

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

Contrast filters are designed to enhance the contrast of the image by increasing the difference between the light and dark areas.

Multiple choice

Which filter is commonly used to create a vignette effect?

  1. Vignette filter

  2. Star filter

  3. Graduated neutral density filter

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

Vignette filters are designed to create a vignette effect, which is a gradual darkening of the edges of the image, often used to draw attention to the center of the frame.

Multiple choice

Which filter is commonly used to create a black and white effect?

  1. Black and white filter

  2. Neutral density filter

  3. Graduated neutral density filter

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

Black and white filters are used to create a black and white effect in the image, converting the colors to shades of gray.

Multiple choice

Which technique is used to remove unwanted objects or distractions from a sports photography image?

  1. Color correction

  2. Noise reduction

  3. Sharpening

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

Content-aware fill allows photographers to seamlessly remove unwanted objects by automatically filling the area with content that matches the surrounding pixels.

Multiple choice

Which technique is used to enhance the colors and vibrancy of a sports photography image?

  1. Color correction

  2. Noise reduction

  3. Sharpening

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

Vibrance adjustment allows photographers to selectively enhance the intensity of colors without affecting the overall saturation.