Physical Principles & Instrumentation - Quiz #2 | Attempts: 87

1.

A typical display monitor has _______ horizontal lines placed closely together.

A.

700
B.

100
C.

525
D.

300-400

Correct Answer
C. 525

Explanation
A typical display monitor has 525 horizontal lines placed closely together. This refers to the number of scan lines or horizontal pixels that make up the display resolution. The more lines or pixels there are, the higher the resolution and the sharper the image on the screen. 525 is a common number for standard definition displays, while higher resolutions like 1080p or 4K have significantly more lines.

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2.

It takes 1/30 of a second to produce 1 frame

A.

True
B.

False

Correct Answer
A. True

Explanation
The given statement is true. It states that it takes 1/30 of a second to produce 1 frame. This means that in a span of 1 second, 30 frames can be produced. This is a common measurement in video production and is often referred to as the frame rate. A higher frame rate results in smoother motion, while a lower frame rate may result in choppier motion.

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3.

A non interlaced display (progressive) writes the lines in _____ ?

A.

Sequence
B.

Writes odd lines first then writes even lines second
C.

A progressive screen combines lines to form one frame on the display
D.

A & C
E.

All of the above

Correct Answer
A. Sequence

Explanation
A non interlaced display (progressive) writes the lines in sequence, meaning it writes each line consecutively from top to bottom to form one complete frame on the display. This is in contrast to an interlaced display which writes odd lines first, then writes even lines second, resulting in a slightly different visual appearance.

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4.

How many shades of gray are there in a 7 bit system?

A.

256
B.

64
C.

32
D.

128

Correct Answer
D. 128

Explanation
In a 7-bit system, each bit can have two possible values (0 or 1). Therefore, there are a total of 2^7 = 128 possible combinations of 7 bits. Each combination represents a different shade of gray, so there are 128 shades of gray in a 7-bit system.

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5.

High resolution monitors with a greater number of horizontal lines (1000 or more) will produce better ___?

A.

Frame rate
B.

Spatial resolution
C.

Better temporal resolution
D.

Better sector size
E.

A & D

Correct Answer
B. Spatial resolution

Explanation
High resolution monitors with a greater number of horizontal lines (1000 or more) will produce better spatial resolution. Spatial resolution refers to the level of detail that can be seen in an image or displayed on a monitor. A higher number of horizontal lines means that there are more pixels available to display the image, resulting in a clearer and more detailed picture. Therefore, monitors with higher resolution have better spatial resolution.

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6.

Write zoom will produce?

A.

Frame rate
B.

Spatial resolution
C.

Better temporal resolution
D.

Better sector size
E.

A & D

Correct Answer
B. Spatial resolution

Explanation
The correct answer is spatial resolution. When using the zoom function, it allows the user to adjust the spatial resolution of the image. This means that by zooming in, the image will appear closer and more detailed, while zooming out will show a wider view with less detail. Therefore, the zoom function directly affects the spatial resolution of the image.

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7.

A type of frame averaging used to make the image appear smoother is a function of?

A.

Edge enhancement
B.

Persistence
C.

Post processing
D.

Rectification

Correct Answer
A. Edge enhancement

Explanation
Edge enhancement is a technique used in image processing to enhance the edges of objects in an image, making them appear sharper and more defined. This can give the illusion of a smoother image overall. By emphasizing the edges, the details in the image become more prominent, resulting in a smoother appearance. Persistence refers to the ability of an image to retain its appearance for a short period of time, which is not relevant to frame averaging. Post processing refers to any processing done on an image after it has been captured, which may or may not include edge enhancement. Rectification refers to the process of correcting distortions in an image, which is also not directly related to frame averaging or making the image appear smoother.

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8.

Fill-in Interpolation (pixel interpolation) is a technique used to fill in missing pixels.

A.

True
B.

False

Correct Answer
A. True

Explanation
Fill-in interpolation, also known as pixel interpolation, is indeed a technique used to fill in missing pixels. It involves estimating the values of the missing pixels based on the surrounding pixels, in order to create a smoother and more complete image. This technique is commonly used in image processing and computer graphics to enhance the visual quality of images.

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9.

Write the binary system (100110) is base 10 number

Correct Answer
38

Explanation
The binary system (100110) can be converted to base 10 by multiplying each digit by its corresponding power of 2 and summing the results. In this case, the calculation would be: (1 * 2^5) + (0 * 2^4) + (0 * 2^3) + (1 * 2^2) + (1 * 2^1) + (0 * 2^0) = 32 + 0 + 0 + 4 + 2 + 0 = 38.

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4

10.

The binary system (101010) in base 10 number

Correct Answer
42

Explanation
The given binary number (101010) can be converted to base 10 by multiplying each digit by the corresponding power of 2 and adding them together. In this case, starting from the rightmost digit, we have 0*2^0 + 1*2^1 + 0*2^2 + 1*2^3 + 0*2^4 + 1*2^5, which simplifies to 0 + 2 + 0 + 8 + 0 + 32 = 42.

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4