CS 2033 Final Exam Questions And Answers
100% Correct
definition of photoshop - ANSWER to digitally alter (a photograph or other graphic)
using image-editing software such as Photoshop
common uses for Photoshop - ANSWER removing acne and wrinkles, changing body size
(muscles, waist, stomach, legs, ect.)
It is often used in ads, tabloids, and magazines to make people look different (better or
worse)
What is RGB? - ANSWER red, green, blue with triplet number sets from 0-255
for ex. 255-0-0 is red
75-75-75 for a shade of grey. all same numbers will result in a shade of grey
0-0-0 is black and 255-255-255 is white
What is hexadecimal color? - ANSWER Hexadecimal are 6-digit strings of numbers 0-F
(F=15)
for ex. FFFFFF is white and 000000 is black, and FF0000 is red
,What is bitmapped imaging? - ANSWER Bitmapped graphics are composed of grids of
pixel cells. Each pixel has exactly one colour.
Cameras convert analog scenes into digital pictures by performing sampling and
quantizing.
Resolution denotes how big the pixels are, usually measured in PPI.
What's the difference between resampling and resizing images? - ANSWER Resizing is in
terms of print if you gunna change how big you print something.
This does not involve changing the pixels (samples).
It simply changes the resolution.
Mainly used for printing, as this only affects the size it will print. no change in quality.
Resampling is choosing differences in sampling. This means number of pixels will
change. So pixels=samples.
This process changes how many pixels are in the image, not how big the pixels are.
chnage in quality
Downsampling - ANSWER Downsampling = making it smaller.
,Pixels are removed via decimation
Upsampling - ANSWER Upsampling = making it larger.
Pixels must be added via interpolation.
What is an artifact? - ANSWER Artifacts are distortions due to missing pixels in an image.
What is interpolation? - ANSWER A mathematical method of estimating an unknown
value using the known values on either side of the unknown.
In simple terms, interpolation means averaging the colours of the neighbouring pixels.
This may work well if there is a consistent gradient between the colours but this isn't
often the case.
how many options are there in terms of decimation/interpolation types? - ANSWER 6,
dont have to know types but here they are anyways:
nearest neighbor
bi linear
bi cubic (4 other variations of this)
, what are selections? - ANSWER Many Photoshop features can be applied to any region
of the image.
The region could be the entire canvas, a small rectangle or oval, or a complex polygon.
These regions are called selections and they are an important part of using Photoshop.
Selections are usually indicated with "marching ants", or rotating dashed lines around
the perimeter
what are the types of selectors? - ANSWER Marquee Tools
Lasso Tools
Quick Selection Tool
Magic Wand Tool
what is the marquee tool? - ANSWER Marquee Tools
Simple to use, just drag your cursor.
Rectangular and Elliptical are commonly used marquees.
Single row / column marquees
are not as important.
what is the lasso tool? - ANSWER Allows you to make selections from drawing segments
in freeform.
100% Correct
definition of photoshop - ANSWER to digitally alter (a photograph or other graphic)
using image-editing software such as Photoshop
common uses for Photoshop - ANSWER removing acne and wrinkles, changing body size
(muscles, waist, stomach, legs, ect.)
It is often used in ads, tabloids, and magazines to make people look different (better or
worse)
What is RGB? - ANSWER red, green, blue with triplet number sets from 0-255
for ex. 255-0-0 is red
75-75-75 for a shade of grey. all same numbers will result in a shade of grey
0-0-0 is black and 255-255-255 is white
What is hexadecimal color? - ANSWER Hexadecimal are 6-digit strings of numbers 0-F
(F=15)
for ex. FFFFFF is white and 000000 is black, and FF0000 is red
,What is bitmapped imaging? - ANSWER Bitmapped graphics are composed of grids of
pixel cells. Each pixel has exactly one colour.
Cameras convert analog scenes into digital pictures by performing sampling and
quantizing.
Resolution denotes how big the pixels are, usually measured in PPI.
What's the difference between resampling and resizing images? - ANSWER Resizing is in
terms of print if you gunna change how big you print something.
This does not involve changing the pixels (samples).
It simply changes the resolution.
Mainly used for printing, as this only affects the size it will print. no change in quality.
Resampling is choosing differences in sampling. This means number of pixels will
change. So pixels=samples.
This process changes how many pixels are in the image, not how big the pixels are.
chnage in quality
Downsampling - ANSWER Downsampling = making it smaller.
,Pixels are removed via decimation
Upsampling - ANSWER Upsampling = making it larger.
Pixels must be added via interpolation.
What is an artifact? - ANSWER Artifacts are distortions due to missing pixels in an image.
What is interpolation? - ANSWER A mathematical method of estimating an unknown
value using the known values on either side of the unknown.
In simple terms, interpolation means averaging the colours of the neighbouring pixels.
This may work well if there is a consistent gradient between the colours but this isn't
often the case.
how many options are there in terms of decimation/interpolation types? - ANSWER 6,
dont have to know types but here they are anyways:
nearest neighbor
bi linear
bi cubic (4 other variations of this)
, what are selections? - ANSWER Many Photoshop features can be applied to any region
of the image.
The region could be the entire canvas, a small rectangle or oval, or a complex polygon.
These regions are called selections and they are an important part of using Photoshop.
Selections are usually indicated with "marching ants", or rotating dashed lines around
the perimeter
what are the types of selectors? - ANSWER Marquee Tools
Lasso Tools
Quick Selection Tool
Magic Wand Tool
what is the marquee tool? - ANSWER Marquee Tools
Simple to use, just drag your cursor.
Rectangular and Elliptical are commonly used marquees.
Single row / column marquees
are not as important.
what is the lasso tool? - ANSWER Allows you to make selections from drawing segments
in freeform.
