chapter 11

Question 1

ndims

Answer 1

returns number of dimensions in input array

Question 2

size

Answer 2

returns size of each dimension of input

Question 3

size(array, 1)

Answer 3

returns number of rows

Question 4

size(array, 2)

Answer 4

returns number of columns

Question 5

pixel element

Answer 5

regions of uniform color

Question 6

RGB image

Answer 6

stored as an n by 3 array, first two indices are the location of pixel and this is color plane (RGB triple)

Question 7

RGB triple

Answer 7

set of red, green, and blue intensities

Question 8

[1, 0, 0]

Answer 8

saturated red

Question 9

[0, 1, 0]

Answer 9

saturated green

Question 10

[0, 0, 1]

Answer 10

saturated blue

Question 11

grayscale image

Answer 11

shows lightness of colors in image through shades ranging from white (lightest, 1.0) to black (darkest, 0.0)

Question 12

hue

Answer 12

measurement of color

Question 13

saturation

Answer 13

measurement of purity

Question 14

lumination

Answer 14

measurement of intensity

Question 15

rgb2gray(imageRGB)

Answer 15

eliminates situation and hue from RGB

Question 16

ind2gray(imageIndexed, colorMap)

Answer 16

eliminate saturation and hue from indexed image of color map colors

Question 17

mat2gray(matrix, [amin, amax])

Answer 17

returns array of luminance (0.0 black, 1.0 white)

Question 18

[imageData, colorMap] = imread(‘file name’)

Answer 18

reads image stored in 8 bit to5 PNG

Question 19

image(imagedata)

Answer 19

creates image graphics my interpreting input

Question 20

imagesc(image)

Answer 20

scales data to full range of color map then displays image

Question 21

iminfo(‘file’)

Answer 21

returns structure about image

Question 22

imwrite(imageData, ‘file name’)

Answer 22

writes image into file

Question 23

ind2rgb(imageIndexed, colormap)

Answer 23

convers indexed image with associated color map into rgb image

Question 24

rgb2ind(imageRGB, colorMap)

Answer 24

converts rgb image to indexed image associated with color map

Question 25

indexed image

Answer 25

similar to paint by number, stores spatial and color info in two separate arrays, an image array and colormap array

Question 26

image array

Answer 26

2D array where each element correspond to a location of pixel, has spatial info, class double, uint8 or uint16

Question 27

color map array

Answer 27

color pallet of N colors, contains N rows and 3 columns, each row corresponds to a color and columns are the RGB combo for it (range [0, 1])

Question 28

numel(inArray)

Answer 28

returns number of array elements

Question 29

fliplr(A)

Answer 29

flips array left to right

Question 30

flipud(A)

Answer 30

flips array ups down

Question 31

rot90(A)

Answer 31

rotates array 90 degrees

Question 32

tril(A)

Answer 32

returns lower triangle part of array

Question 33

triu(A)

Answer 33

returns upper triangle part of array

Question 34

isequal(array1, array2)

Answer 34

checks if arrays are equal, all NaN are inequal

Question 35

isequaln(array1, array2)

Answer 35

checks if arrays are equal, all NaN are equal

Question 36

isa(obj, className)

Answer 36

checks if object is of class

Question 37

isprime

Answer 37

returns 1 for prime number

Question 38

all(A)

Answer 38

returns 1 for all elements that aren’t 0, 1 for row and 2 for column

Question 39

any(A)

Answer 39

returns 1 for any elements that are 0