Option 1
1. Information about the graphic image is formed in the video memory:
1) Central processing unit,
2) GPU,
3) Graphics adapter,
4) Display processor.
2. The earliest graphical information models include:
1) Rock paintings
2) Books with illustrations
3) Maps of the Earth's surface
3. Primitives in a graphics editor are:
1) Graphics editor mode
2) Operations performed on files containing images
3) Figures created in a graphics editor
4) The simplest shapes that are drawn using special tools of the graphic editor
4. Graphics with the representation of the image as a set of points:
1) Fractal
2) Raster
3) Vector
4) linear
5. Splitting a sound wave into separate time sections:
1) Amplitude
2) Frequency
3) Discretization
4) quantization
6.
Audio coding depth is the amount… that is required for… discrete volume levels of… sound.
1) Information, coding, digital
2) Data, transformation, digital
3) Information, coding, analog
4) Information, transformation, digital
7. The sound volume level is 65536. What is the coding depth?
8. To obtain high-quality audio digitization, 20-bit signal coding is used. Calculate how much space will take one minute of digital audio on any digital media recorded at 44.1 kHz.
9. Calculate the volume of a stereo audio file with a length of 20 seconds with 16-bit encoding and a sampling rate of 32 kHz. (present the answer in megabytes as a decimal fraction, no more than two decimal places)
10. What is the encoding depth if a stereo audio file with a playback duration of 1 min and a recording rate of 32 kHz takes about 3.66 MB of memory?
11. For storing a 640 bitmap 480 pixels without compression allocated 300 KB of memory. What is the maximum possible number of colors in the image palette?
12. The graphic display operates in 640 mode400 pixels with 4 colors. What should be the amount of video memory in kilobytes?
13. Fill the table:
14. Fill in the blanks in the proposals:
The coding quality depends on the number of measurements of the signal level per unit of time, ie ....
The more the number of measurements is made in one second (the higher the sampling rate), the more accurate the procedure….
Final test on the topic
"Coding of graphic and sound information". Grade 9.
Option 2
1. A pixel on a color display screen is:
1) A set of three grains of phosphor
2) Phosphor grains
3) Electron beam
4) Imaginary screen point
2. Fill in the blanks in the proposal:
The contents of the video memory are continuously monitored ... and displayed ... on the screen.
1) Display processor, central processing unit
2) central processing unit, display processor
3) Display processor, display processor
4) central processing unit, graphics adapter
3. The video memory page is 16000 bytes. Display works in 320 mode400 pixels. How many colors are in the palette?
4. To store a 256-color image, one pixel is allocated for encoding:
5. The amount of information required to encode discrete loudness levels of digital sound is called:
1) Quantization
2) Discretization
3) Coding depth
4) fragmentation
6. Fill in the blanks in the proposal.
At the heart of ... sound with the use of a computer is the process ... of vibrations of air into vibrations of an electric current and the subsequent ... of an analog electrical signal.
1) Encoding, transformation, sampling
2) Conversion, encoding, sampling
3) Quantization, transformation, sampling
4) Encoding, transforming, quantizing
7. What is the sound volume level if the encoding depth is 16 bits
8. To obtain high-quality audio digitization, 16-bit signal coding is used. Calculate how much space will take up one minute of digital audio on any digital medium recorded at 11 kHz.
1) 10 MB
3) 1.3 MB
9. Calculate the volume of a stereo audio file with a length of 10 seconds with 16-bit encoding and a sampling rate of 32 kHz. (present the answer in megabytes as a decimal fraction, no more than two decimal places)
10. What is the encoding depth if a mono-audio file with a playback duration of 1 min and a recording rate of 32 kHz takes up 3.66 MB?
11. To store a 64 × 64 pixel bitmap, 1.5 kilobytes of memory were allocated. What is the maximum possible number of colors in the palette?
12. Specify the minimum amount of memory, in kilobytes, sufficient to store any 256 × 256 pixel bitmap image, if the image is known to use a palette of 216 colors.
13. Fill the table:
14. Fill in the blanks in the proposals.
In order for a computer to process sound, a continuous sound signal must be converted to ... discrete form using time sampling.
A continuous sound wave is divided into separate small time sections, for each such section a certain amount of ... sound is set. This process is called ... sound.
Option 1
How much information does the binary encoding of 1 point on a color screen (16 colors) require?
d) 1 KB.
Option 2
a) 10,000 bits;
b) 10,000 bytes;
c) 10 KB;
d) 1000 bits.
Option 3
a) 2 times;
b) 4 times;
c) 8 times;
d) 16 times.
Option 4
d) 16 bytes.
ANSWERS
Option 1
For storing a bitmap with a size of 128 x 128 pixels, 4 KB of memory are allocated. What is the maximum possible number of colors in the image palette.
Decision:
Let's determine the number of image points 128 * 128 = 16384 dots or pixels. The amount of memory for an image of 4 KB is expressed in bits, since V = I * X * Y is calculated in bits. 4KB = 4 * 1024 = 4,096 bytes = 4096 * 8 bits = 32,768 bits. Find the color depth I = V / (X * Y) = 32768: 16384 = 2.
N = 2 I, where N is the number of colors in the palette. N = 4. Answer: 4
What is the minimum amount of memory (in bytes) that is sufficient to store a 32 x 32 pixel black and white bitmap if the image is known to use no more than 16 shades of gray?
Decision:
The color depth is 4 because 16 color gradations are used. 32 * 32 * 4 = 4096 bits of memory for storing black and white images. 4096: 8 = 512 bytes. Answer: 512 bytes
How much information does the binary encoding of 1 point on a color screen in 16 colors require?
c) 4 bits;
d) 1 KB.
Option 2
How much video memory is needed to store four pages of an image if the bit depth is 24 and the display resolution is 800 x 600 pixels?
Decision:
Let's find the amount of video memory for one page: 800 * 600 * 24 = 11520000 bits = 1440000 bytes = 1406.25 KB ≈ 1.37 MB. 1.37 * 4 = 5.48 MB ≈ 5.5 MB for storing 4 pages. Answer: 5.5 MB
The video memory page is 16000 bytes. The display operates in a mode of 320 * 400 pixels. How many colors are in the palette?
Decision:
V = I * X * Y - volume of one page, V = 16000 bytes = 128000 bits by condition. Find the color depth I. I = V / (X * Y). I = 128000 / (320 * 400) = 1. Now let's determine how many colors are in the palette. K =2 I , Where K- the number of colors, I- color depth . K = 2 Answer: 2 colors.
A raster graphic file contains a black and white image (without grayscale) with a size of 100x100 pixels. What is the information volume of this file?
a) 10,000 bits;
b) 10,000 bytes;
c) 10 KB;
d) 1000 bits.
Option 3
Determine the amount of computer video memory that is required to implement the graphics mode of the High Color monitor (16 bits per point) with a resolution of 1024 x 768 pixels and a palette of 65536 colors.
Decision:
The number of image points is equal to: 1024 * 768 = 786 432 The required amount of video memory is: 16 bits ´ 786 432 = 12 582 912 bits = 1572864 bytes = 1536 KB = 1.5 MB
Answer: 1.5 MB
Specify the minimum amount of memory (in kilobytes) that is sufficient to store any 256 x 256 pixel bitmap image, if the image is known to use a 2-16 color palette. The palette itself does not need to be stored.
Decision:
Let's find the minimum amount of memory required to store one pixel. The image uses a palette of 2 16 colors, therefore, one pixel can be associated with any of 2 16 possible color numbers in the palette. Therefore, the minimum amount of memory for one pixel will be equal to log 2 2 16 = 16 bits. The minimum amount of memory sufficient to store the entire image will be 16 * 256 * 256 = 2 4 * 2 8 * 2 8 = 2 20 bits = 2 20: 2 3 = 2 17 bytes = 2 17: 2 10 = 2 7 KB = 128 KB.
Answer: 128 KB.
In the process of converting a graphic file, the number of colors decreased from 65,536 to 256. How many times will the information volume of the file be reduced?
a) 2 times;
b) 4 times;
c) 8 times;
d) 16 times.
Option 4
Is the video memory of 256 KB sufficient to operate the monitor in 640 ´ 480 mode with a palette of 16 colors?
Decision:
Let's find out the amount of video memory that is required to operate the monitor in 640x480 mode and a palette of 16 colors. V = I * X * Y = 640 * 480 * 4 (2 4 = 16, color depth is 4),
V = 1228800 bits = 153600 bytes = 150 KB. 150< 256, значит памяти достаточно.
Answer: enough.
The monitor operates with a 16 color palette at 640 * 400 pixels. It takes 1250 KB to encode the image. How many pages of video memory does it take?
Decision:
Because page is a section of video memory that contains information about one screen image of one "picture" on the screen, i.e. Since several pages can be located simultaneously in the video memory, to find out the number of pages, you need to divide the video memory for the entire image by the memory size by 1 page. TO-number of pages, K =V pic / V 1 page... V image = 1250 KB as required.
To do this, let's calculate the amount of video memory for one page of an image with a 16 color palette and a resolution of 640 * 400. V 1 page = 640 * 400 * 4, where 4 is the color depth (2 4 = 16). V 1 page = 1024000 bits = 128000 bytes = 125 KB. K = 1250: 125 = 10 pages. Answer: 10 pages.
How much information is required for binary encoding of 1 point on a black and white screen (without brightness gradation)?
a) 1 bit;
Question 1
A. 1 file
B. 1 bit
C. 1 byte
D. 1 KB
Question 2
What is 1 byte?
A. 10 bit
B. 10 kB
C. 8 bit
D. 8 points
Question 3
A. 10,000 bits
B. 1,024 bytes
C. 10 KB
D. 1,000 bits
Question 4
A. 1 page of text
Question 5
A. Analog and discrete
B. Vector and analog
C. Discrete and vector
Question 6
A. point
B. inch
C. pixel
D. centimeter
E. raster
Question 7
C. electron beam
Question 8
A. 2 bytes
B. 4 bit
C. 8 bit
D. 4 bytes
E. 1 KB
F. 1 byte
Question 9
A. 100 bit
B. 400 bit
C. 800 bit
D. 400 bytes
E. 100 bytes
Question 10
A. N = 2 ^ i
B. N = 2 * i
C. I = N * 2
D. 2 = N ^ i
E. I = N ^ 2
Question 11
Depth of color is ...
Question 12
Basic colors of the RGB palette:
A. red, blue and green
B. blue, yellow, green
Question 13
Basic colors of the CMYK palette:
D. blue, yellow, red
E. the color gamut is formed by setting the values of hue, saturation and brightness
Question 14
Basic colors of the HSB palette:
D. blue, yellow, red
Question 15
A. sampling
B. formalization
C. forwarding
D. discrediting
Tasks
How much video memory is required to store three pages of an image, assuming the display has a resolution of 640 x 480 pixels and the number of colors used is 24?
It is known that the video memory of a computer is 512 KB. The screen resolution is 640 by 480 pixels. How many pages of the screen will fit in the video memory at the same time with a palette of 256 colors?
A raster graphic file contains a black and white image (no grayscale) with a size of 100 x 100 pixels. How much memory is required to store this file?
The figure is built using a palette of 256 colors on a monitor screen with a graphic resolution of 1024 by 768. Calculate the amount of memory required to store this figure.
What is the information volume of a book if it contains 200 pages of text (each page has 50 lines of 80 characters and 10 color pictures). Each picture is built at a graphic resolution of 800 x 600 pixels monitor with a palette of 16 colors.
The amount of video memory is 1 MB. The display resolution is 800 by 600 pixels. What is the maximum number of colors that can be used if the video memory is split over two pages?
TEST "Coding information"
Question 1
The smallest unit of information measurement is taken ...
A. 1 file
B. 1 bit
C. 1 byte
D. 1 KB
Question 2
What is 1 byte?
A. 10 bit
B. 10 kB
C. 8 bit
D. 8 points
Question 3
A raster graphic file contains a black and white image (no grayscale) with a size of 100 x 100 pixels. What is the information volume of this file?
A. 10,000 bits
B. 1,024 bytes
C. 10 KB
D. 1,000 bits
Question 4
The largest information volume will have a file containing ...
A. 1 page of text
B. black and white drawing 100 X 100 pixels
C. Audio recording 1 min.
D. video clip, 1 min.
Question 5
What are the forms of presentation of graphic information.
A. Analog and discrete
B. Vector and analog
C. Discrete and vector
Question 6
The smallest element of the screen surface for which the address, color and intensity can be set is:
A. point
B. inch
C. pixel
D. centimeter
E. raster
Question 7
A pixel on a monitor screen is:
A. the smallest area of the image that can be independently assigned a color
B. Binary code of graphic information
C. electron beam
D. a set of 16 grains of phosphor
Question 8
To store a 256-color image, one pixel is allocated for encoding:
A. 2 bytes
B. 4 bit
C. 8 bit
D. 4 bytes
E. 1 KB
F. 1 byte
Question 9
A raster graphic file contains a black and white image with 16 shades of gray, 10 x 10 pixels in size. What is the information volume of this file?
A. 100 bit
B. 400 bit
C. 800 bit
D. 400 bytes
E. 100 bytes
Question 10
The number of colors in the palette (N) and the amount of information required to encode each point (I) are related and can be calculated by the formula:
A. N = 2 ^ i
B. N = 2 * i
C. I = N * 2
D. 2 = N ^ i
E. I = N ^ 2
Question 11
Depth of color is ...
A. The amount of information that is used to encode the color of one point in the image
B. the amount of information that is used to encode the color of the entire image
C. definitely the amount of information needed to get the color in the image
Question 12
Basic colors of the RGB palette:
A. red, blue and green
B. blue, yellow, green
C. red, yellow and green
D. cyan, yellow and magenta
E. the color gamut is formed by setting the values of hue, saturation and brightness
Question 13
Basic colors of the CMYK palette:
A. red, yellow, purple
B. yellow, cyan, magenta
C. red, blue, green
D. blue, yellow, red
E. the color gamut is formed by setting the values of hue, saturation and brightness
Question 14
Basic colors of the HSB palette:
A. red, green, blue
B. the color gamut is formed by setting the values of hue, saturation and brightness
C. yellow, magenta, cyan
D. blue, yellow, red
Question 15
Converting a graphic image from an analog to a discrete form is called ...
A. sampling
B. formalization
C. forwarding
D. discrediting
Test on the topic: "Coding and processing of graphic information" Option 1 1. One of the main functions of a graphic editor is: 1) image scaling; 2) storage of the image code; 3) creating images; 4) viewing and displaying the contents of the video memory. 2. The elementary object used in the raster graphics editor is: 1) point (pixel); 2) an object (rectangle, circle, etc.); 3) a palette of colors; 4) familiarity (symbol) 3. The grid of horizontal and vertical columns, which is formed by pixels on the screen, is called: 1) video memory; 2) video adapter; 3) raster; 4) display processor; 4. Graphics with the representation of an image in the form of a set of objects is called: 1) fractal; 2) raster; 3) vector; 4) straightforward. 5. A pixel on the display screen is: 1) the minimum area of the image, which can be independently assigned a color; 2) binary code of graphic information; 3) an electron beam; 4) a set of 16 phosphor grains. 6. Video controller is: 1) display processor; 2) a program that allocates video memory resources; 3) an electronic volatile device for storing information about a graphic image; 4) a device that controls the operation of a graphic display. 7 .... 1 2 3 4 5 6 7 8 Option 1 c a c c a d b b Option 2 b c b a d a b c
Test on the topic: "Coding and processing of graphic information"
Option 1
scaling images;
storing the image code;
creation of images;
viewing and displaying the contents of video memory.
point (pixel);
object (rectangle, circle, etc.);
Color palette;
familiarity (symbol)
One of the main functions of the graphics editor is:
The elementary object used in the raster graphics editor is:
The grid of horizontal and vertical columns, which is formed by pixels on the screen, is called:
display processor;
video memory;
video adapter;
Graphics with the representation of an image in the form of a collection of objects is called:
fractal;
raster;
vector;
straightforward.
the minimum area of the image, which can be independently assigned a color;
binary code of graphic information;
electron beam;
a set of 16 phosphor grains.
display processor;
a program that allocates video memory resources;
an electronic volatile device for storing information about a graphic image;
a device that controls the operation of a graphic display.
red, green and blue;
red, green, blue and brightness;
yellow, green, blue and red;
yellow, blue, red and brightness.
raster;
vector.
A pixel on the display screen is:
A video controller is:
The color of a dot on the display screen with a 16-color palette is formed from the signals:
Which way of presenting graphical information is more economical in terms of memory usage:
Test on the topic "Coding and processing of graphic information"
Option 2
full set of graphical primitives of a graphical editor;
a graphical editor environment;
a list of the graphical editor operating modes;
a set of commands that can be used when working with a graphical editor.
phosphor grain;
vector graphics;
raster graphics.
an electronic device for storing the binary code of the image displayed on the screen;
a program that allocates PC resources during image processing;
a device that controls the operation of a graphic display;
part of random access memory.
straightforward;
fractal;
vector;
raster.
display processor and video memory;
display, display processor and video memory;
display processor, random access memory, backbone;
backbone, display processor and video memory.
a graphical editor environment;
the simplest figures drawn with the help of special tools of the graphic editor;
operations performed on files containing images created in a graphical editor;
modes of operation of the graphical editor.
What extension do the files of the graphics editor Paint have?
Toolbar buttons, palette, working area, menu form:
The smallest element of the screen surface for which the address, color and intensity can be set is:
Deformation of the image when changing the size of the picture is one of the disadvantages:
Video memory is:
Graphics with the representation of an image in the form of collections of points is called:
What devices are included with the graphics adapter?
Primitives in a graphics editor are:
ANSWERS
Option 1