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Industrial Technology: Multimedia (HSC) > Graphics > Flashcards

Graphics Flashcards

1
Q

Which of the following is an advantage of lossless compression?

A. - High compression ratios

B. - Does not retain data when uncompressed

C. - Does retain data when uncompressed

D. - Can be edited while compressed

A

C. - Does retain data when uncompressed

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2
Q

List the properties of a PNG File

A

PNG = Portable Network Graphic

Allows for Transparency

Supports millions of colours

Lossless compression

Maintains their original quality when compressed

Larger in file size compared to GIF and JPG

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3
Q

Which of the following best describes how an interlaced GIF downloads?

A. - As blocks

B. - In alternating strips

C. - Entire image instantly

D. - From the centre outwards

A

B - In alternating strips

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4
Q

List the properties of a GIF file.

A

GIF = Graphics Interchange Format

Limited to 256 colours

Low Resolution

Not suitable for photos

Suitable for Banners, Charts and Buttons

Allows for Transparency

Can be animated

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5
Q

Which row of the table shows the correct relationship between the number of displayable colours and the number of bits per pixel?

A

No. Colours —- No. Bits

C - 65,536 ——- 16

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6
Q

Describe the difference between Bitmap and Vector graphics

A

Bit-mapped graphics store and manipulate each pixel. They produce good quality images where shading and fine detail are needed. However when resized, bit-mapped graphics become ragged and suffer a loss of resolution. Bit-mapped graphics are created and edited using a painting program (Photoshop, Paint Shop Pro). Common file formats for Bit-mapped images include:

  • JPG
  • GIF
  • PNG
  • BMP
  • TIFF

Vector graphics store pictures as a collection of objects such as shapes and lines. Each object is defined by its characteristics such as position, line width and pattern. These characteristics are stored as mathematical expressions and displayed on the screen as pixels. Vector Graphics do not lose resolution when they are resized or stretched and require less memory than bit-mapped. Vector graphics are created and edited using a drawing program. (Corel Draw, Illustrator). Common file formats for Vector Graphics include:

  • WMF
  • CDR
  • PCX
  • EPS
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7
Q

Susan works at a printing company that turn’s the customers’ digital photos into high quality canvas prints.

Recommend with justification, ONE file format that would be appropriate for the company to print.

A

JPEG is a standard image format used in many printing solutions. They are a standard file format for the best combination of both file size and image quality. A JPEG image with a resolution of 100 dpi or higher would be suitable for printing on a canvas. Therefore, a JPEG file format would be an appropriate choice for the company to use for printing.

TIFF – This is a lossless file format that does not lose quality when it compressed and uncompressed. It supports CMYK colour profiles but is a bitmap file, meaning that if the original image is significantly resized, it could lose image sharpness. It’s an appropriate file format to be used by the company. However, due to the high quality of the image, the size of the file may be an issue as it may take a while to open or upload.

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8
Q

What is a filter?

Outline how filters can enhance an image.

A

A filter allows you to apply various effects to help enhance an image. They are designed to achieve a specific effect on an image.

You can completely change the look and mood to match your creative ideas. Filters can soften hard edges, bring out subtle highlights, and make a new image look like a vintage image.

Some examples of filters include colour enhancements, brightness adjustments, lens flares, noise filters or motion blurs, just to name a few.

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9
Q

What name is given to the type of image shown?

A. - Analogue image

B. - Bitmapped image

C. - Vector image

D. - Binary image

A

B. - Bitmapped image

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10
Q

List the properties of a TIFF File

A

TIFF = Tagged Image File Format

Doesn’t Compress

Designed to preserve the quality of the image

Allows for transparency

Supports millions of colours

Larger file size

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11
Q

Which of the following file types allows for transparency?

A. - JPG

B. - MP4

C. - PNG

D. - TIFF

A

C - PNG

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12
Q

Which of the following is an example of an image file format?

A. - TIFF.image

B. - Picture.TIFF

C. - JPEG.picture

D. - Image.MP4

A

B - Picture.TIFF

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13
Q

List the properties of a JPG FIle

A

JPG / JPEG = Joint Photographic Experts Group

Lossy compression

Loses quality when compressed

Supports 16 million colours

Good quality for photos

Compressed format for transmitting over the Internet

Does not allow for transparency

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14
Q

Which of the following is true of a progressively loading image?

A. - The image will appear blank at first, then load from top to bottom

B. - The image will loads slowly from bottom to top

C. - The image loads immediately in low quality, then is refined as more scans are rendered

D. - The image loads either odd or even lines, then on the next cycle, loads the other lines. This continues until the image has fully loaded.

A

C. - The image loads immediately in low quality, then is refined as more scans are rendered

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15
Q

The picture below is a frame still from a movie clip.

Calculate the file size of the clip in kilobytes to 2 decimal places – showing all working

A

(500 x 375 x 8) / (8 x 1024)

= (1,500,000 / 8192)

= 183.10 Kb

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16
Q

Tom pays a graphic designer to make a logo for his carpet cleaning business. Tom wants to be able to include this logo on a variety of marketing material such as a static online image on a website, an animated online image, and a printed image on large-scale banners.

How does Tom’s use of the logo impact on the file formats selected?

A

For each specific use of the logo, Tom also requires the image to retain a number of other features or characteristics.

  • Static online - online images for websites usually require the logo to include a transparent background and also be small in file size without losing quality due to compression (lossless). The best image file format for this situation would be a PNG.
  • Animated online - Any image for inclusion in an animated online logo should have a very small file size that can be achieved via lossy compression ( as the details lost are harder to see in an online environment as opposed to a print based environment). Given these restrictions, a GIF would be the most appropriate file format.
  • Printed on large-scale banners - Any printed logos more clearly show dithering or jaggies which can be associated with poor image resolution or bitmap generated objects. To stop his banner logo looking fuzzy around definitive lines, Tom would require a vector image, noted by an EPS file format.
17
Q

List the properties of a BMP File

A

BMP = Bitmap Image

High image quality

Supports millions of colours

Larger in file size

Loses quality when scaled down in size

18
Q

•When the resolution of a screen is not high enough, often images can appear to have a staircase effect.

What is the technology that helps to reduce this undesirable staircase effect?

A. - Smoothing

B. - Jaggies

C. - Aliasing

D. - Anti-Aliasing

A

D. - Anti-Aliasing

19
Q

Describe the process of importing an image from one program into another.

A

Importing is the process of transferring external files, such as those stored in a program such as a photo editor and used in another type of software such as a video editor.

Importing the software is translating the data into a format that it can understand so that it can be added or edited to the project.

An example of importing an image could include:

  • Importing an image into a Publisher program means that the image has been converted to a format that can be used by the publishing program so that it can be edited for print or publication. The actual editing of the image is locked, but it could be resized to fit within a particular part of the publisher file.
20
Q

What is the formula used to calculate the file size of an image?

A

Horizontal x Vertical x Bit Depth

__________________________

8 x 1024

21
Q

Describe the relationship between pixels and resolution.

A

All images on the screen are made up of tiny dots called pixels, which is the smallest part of the screen than can be controlled by the computer. The total number of pixels on the screen is called its resolution.

  • For example, if a screens resolution was set to 1024 x 768, this means that there are 1024 pixels being displayed across the screen, and there are 768 rows of pixels being displayed down the screen. This would give a total of 786432 pixels being displayed on the screen.
22
Q

Look at the attached image.

Image 1 was changed to Image 2 to make it suitable for printing in a school newsletter.

What changes were made?

A. - Increase contrast, increase brightness

B. - Increase contrast, decrease brightness

C. - Decrease contrast, increase brightness

D. - Decrease contrast, decrease brightness

A

A - Increase contrast, increase brightness

23
Q

Utilising a high camera angle to capture a subject will contribute to which of the
following effects?

(A) The subject will appear more powerful.

(B) The subject will appear more powerless.

(C) The subject will remain neutral with no purposeful effect.

(D) The subject will complement their background.

A

(B) The subject will appear more powerless.

24
Q

What is the process used to remove ‘jagged’ edges on a bitmapped image known as?

(A) Compression

(B) Vector

(C) Pixelated

(D) Anti-aliasing

A

(D) Anti-aliasing

Industrial Technology: Multimedia (HSC) (9 decks)

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