NTA-UGC-NET 2021 Dec & 2022 June Paper-2
November 25, 2023Question 6665 – UGC NET CS 2017 Jan- paper-3
November 25, 2023Image-Processing
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Question 2
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What does a pixel mask mean?
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string containing only 1’s
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string containing only 0’s
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string containing two 0’s
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string containing 1’s and 0’s
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Question 2 Explanation:
Pixel mask: when a given image is intended to be placed over a background, the transparent areas can be specified through a binary mask.
→ This way, for each intended image there are actually two bitmaps:
1. Actual image, in which the unused areas are given a pixel value with all bits set to 0s.
2. Additional mask, in which the correspondent image areas are given a pixel value of all bits set to 0s and the surrounding areas a value of all bits set to 1s.
In the sample at right, black pixels have the all-zero bits and white pixels have the all-one bits.
→ This way, for each intended image there are actually two bitmaps:
1. Actual image, in which the unused areas are given a pixel value with all bits set to 0s.
2. Additional mask, in which the correspondent image areas are given a pixel value of all bits set to 0s and the surrounding areas a value of all bits set to 1s.
In the sample at right, black pixels have the all-zero bits and white pixels have the all-one bits.
Correct Answer: D
Question 2 Explanation:
Pixel mask: when a given image is intended to be placed over a background, the transparent areas can be specified through a binary mask.
→ This way, for each intended image there are actually two bitmaps:
1. Actual image, in which the unused areas are given a pixel value with all bits set to 0s.
2. Additional mask, in which the correspondent image areas are given a pixel value of all bits set to 0s and the surrounding areas a value of all bits set to 1s.
In the sample at right, black pixels have the all-zero bits and white pixels have the all-one bits.
→ This way, for each intended image there are actually two bitmaps:
1. Actual image, in which the unused areas are given a pixel value with all bits set to 0s.
2. Additional mask, in which the correspondent image areas are given a pixel value of all bits set to 0s and the surrounding areas a value of all bits set to 1s.
In the sample at right, black pixels have the all-zero bits and white pixels have the all-one bits.
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