Solution manual for digital media primer 3rd edition by wong

of 37
All materials on our website are shared by users. If you have any questions about copyright issues, please report us to resolve them. We are always happy to assist you.
Information Report
Category:

Technology

Published:

Views: 0 | Pages: 37

Extension: PDF | Download: 0

Share
Description
Link full download: https://bit.ly/2EgHD6s Language: English ISBN-10: 0134054288 ISBN-13: 978-0134054285 ISBN-13: 9780134054285 digital media primer 3rd edition solution manual solution manual for digital media primer 3rd edition pdf solution manual for digital media primer 3rd edition pdf free digital media primer 3rd edition solution manual pdf download download solution manual for digital media primer 3rd edition
Transcript
  • 1. Solution Manual for Digital Media Primer 3rd Edition by Wong Link full download: https://www.testbankfire.com/download/solution-manual-for-digital- media-primer-3rd-edition-by-wong/ When applicable, please select all correct answers. 1. The process of converting from analog to digital information is a two-step process—sampling and quantizing. In converting an analog image to a digital image, the sampling rate affects . A. the bitdepth of the resulting digital image B. the pixel dimensions of the resulting digital image 2. The process of converting from analog to digital information is a two-step process—sampling and quantizing. In the quantization step, to convert an analog image to a digital image, . A. a two-dimensional grid is applied on the image and each tiny cell on the grid is converted into a pixel B. a two-dimensional grid is applied on the image to apply dithering to the image C. an infinite number of color shades and tones in an analog image is mapped to a finite set of discrete color values D. the resulting digital image file is compressed to have a smaller file size 3. Which of the following factors will increase the file size of a digital image? A. larger pixel dimensions of the image B. higher color depth 4. A digital image captured at a higher resolution than it would have if it had been captured at a lower resolution. A. captures more details B. has more different colors C. has a higher bit depth D. has a larger file size E. has larger pixel dimensions F. uses a higher sampling rate 5. A digital image captured at a higher bit depth than it would have if it had been captured at a lower bit depth. A. captures more details B. has more different colors C. has a larger file size D. has larger pixel dimensions E. uses a higher sampling rate 6. The term pixel is contracted from the words and . 7. True/False : A pixel is a point sample, not a little square. 8. True/False : An 1-bit color depth allows only black and white colors. 9. An 1-bit color depth allows colors. 10. An 8-bit color depth allows colors. 11. A 24-bit color depth allows colors. 12. Bitmapped images are composed of .
  • 2. A. individual pixels, which represent spatial samples of the image or scene B. mathematical descriptions of image elements, which include points, lines, curves, and shapes © 2016 Pearson Education, Inc., Hoboken, NJ. All rights reserved.
  • 3. 4 Answers to Review Questions. "Digital Media Primer" Yue-Ling Wong 13. Vector graphics are composed of . A. individual pixels, which represent spatial samples of the image or scene B. mathematical descriptions of image elements, which include points, lines, curves, and shapes 14. The main advantage(s) of bitmapped images over vector graphics is (are) . A. scalability or resolution independence of images B. ease of editing the image content pixel by pixel C. more compact file size compared to vector graphics 15. The main advantage(s) of vector graphics over bitmapped images is (are) . A. scalability or resolution independence of images B. ease of editing the image content pixel by pixel C. more compact file size compared to bitmapped images 16. Sometimes when you magnify a picture on your computer screen, lines that should be straight lines appear to be jagged. This effect is called . A. anti-aliasing B. aliasing C. dithering D. indexing 17. Generally speaking, how does the file size change if the total number of pixels of an image is doubled? 18. Generally speaking, how does the file size change if the number of pixels of both the width and height of an image are doubled? 19. Generally speaking, how does the file size change if the bit depth of an image is increased from 8 bits to 16 bits? 20. Generally speaking, how does the file size change if the bit depth of an image is increased from 8 bits to 24 bits? 21. Give one example of the image file type that supports lossy compression and one that supports lossless compression. 22. Which of the following are file extensions of pixel-based files? BMP DOC JPEG TXT PNG GIF FLA JPG PSD TIFF EPS WMF SWF AI 23. Which of the following are file extensions of vector graphic files? BMP DOC JPEG TXT PNG GIF FLA JPG PSD TIFF EPS WMF SWF AI 24. What are the primary colors in the RGB color model? 25. What are the primary colors in the CMY color model? 26. What are the primaries in the HSB color model? 27. Which of the following color models takes the form of a color cube? A. RGB B. CMY C. HSB D. CIE XYZ © 2016 Pearson Education, Inc., Hoboken, NJ. All rights reserved.
  • 4. 5 Answers to Review Questions. "Digital Media Primer" Yue-Ling Wong 28. Which of the following color models takes the form of a hexacone? A. RGB B. CMY C. HSB D. CIE XYZ 29. Which of the primaries in the HSB color model takes the form of a color wheel? A. hue B. saturation C. brightness 30. What is the color mixing method for the RGB color model? A. additive B. subtractive 31. What is the color mixing method for the CMY color model? A. additive B. subtractive 32. For the 24-bit color depth, what are the RGB values for (i) white (ii) black (iii)red (iv)green (v)blue (vi) cyan (vii) magenta (viii) yellow (You can use the color picker in your image editing program to confirm your answers.) 33. What are the theoretical CMY values for (i) white (ii) black (iii)red (iv)green (v)blue (vi) cyan (vii)magenta (viii) yellow 34. What are the HSB values for (i) white (ii) black (iii)red (iv)green (v)blue (vi) cyan (vii) magenta (viii) yellow (You can use the color picker in your image editing program to confirm your answers.) 35. What is the primary use of the CMYK color model? 36. Why don’t the colors in a printed image look exactly the same as those you see on the computer screen? © 2016 Pearson Education, Inc., Hoboken, NJ. All rights reserved.
  • 5. Answers to the accompanying lab for the book: "Digital Media Primer" Yue‐Ling Wong, Copyright (c)2015 by Pearson Education, Inc. All rights reserved. Lab: Digital Image Alteration Required Application Program: Adobe Photoshop or Corel Paint Shop Pro. Objectives: 1. Selectively alter an area of an image by making a selection. 2. Apply your knowledge of the various selection tools to choose the best tool for different tasks. Pre-lab: If you are not familiar with the following selection tools in Photoshop, review the Photoshop Selection Tools videos. Lab: Task #1: 1. Open the files: sky.psdand devil-tower.psd (Figure 1a). 2. In the devil-tower.psd, make a selection of the whole clear blue sky area. Apply what you have learned about selection tools and techniques from the chapter and the videos to make the selection. 3. Copy the whole image of the sky.psd. Be careful not to accidentally deselect the sky selection. 4. Return to the devil‐tower.psd. While the blue sky is still being selected, choose Edit > Paste Into. (Note: NOT just Paste, but Paste Into.) 5. Save the file if you need to turn in your file. The sky image you have copied should now be pasted into the selection. See Figure 1b for the resulted image. (a) (b) Figure 1. (a) The original sky image with clear blue sky. (b) The altered image in which the sky is replaced with another image. Write‐up: 1. Which of the followings is the primary selection tool you used to make the selection? magic wand  lasso  magic wand
  • 6.  magnetic lasso  marquee  polygonal lasso  quick mask 2. If you used more than one selection tool, what was the secondary selection tool you used? 3. Describe briefly how you made the selection, for example, the settings you used to set the tool's option. 4. Discuss any problems in the process. Lab: Digital Image Alteration :: Page 2 of 4
  • 7. Task #2: 1. Open the files: sky.psdand window.psd(Figure 2a). 2. Make a selection of the middle pane of the window. It is where the change from Figure 2a to Figure 2b occurs.Apply what you have learned about selection tools and techniques from the chapter and the videos to make the selection. 3. Copy the whole image of the sky.psd. Be careful not to accidentally deselect the window selection. 4. Return to the window.psd. While the window pane is still being selection, choose Edit > Paste Into. (Again, NOT just Paste, but Paste Into.) 5. Save the file if you need to turn in your file. The sky image you have copied should now be pasted into the selection. Figure 2b shows the resulted image. (a) (b) Figure 2. (a) The original window.psd. (b) The altered image in which the reflection of the middle window pane is replaced with the sky image. Write‐up: 1. Which of the followings is the primary selection tool you used to make the selection? polygonal lasso  lasso  magic wand  magnetic lasso  marquee  polygonal lasso  quick mask 2. If you used more than one selection tool, what was the secondary selection tool you used? 3. Describe briefly how you made the selection, for example, the settings you used to set the tool's option. 4. Discuss any problems in the process. Lab: Digital Image Alteration :: Page 3 of 4
  • 8. Task #3: 1. Open the files: window.psd (Figure 3a). 2. Make a selection that includes everything except the middle window pane. Apply what you have learned about selection tools and techniques from the chapter and the videos to make the selection. 3. ChooseImage>Adjustments>Hue/Saturation...inPhotoshop,orAdjust>Hueand Saturation> Hue/Saturation/Lightness... inPaint ShopPro. Lowerthesaturation allthe way to the minimum so that the selected area is turned into grayscale. Figure 3b shows the resulted image. 4. Save the file if you need to turn in your file. (a) (b) Figure 3. (a) The original window.psd. (b) The resulted image: except the middle window pane, the rest of image is grayscale. Write‐up: 5. Which of the followings is the primary selection tool you used to make the selection? polygonal lasso and then invert the selection  lasso  magic wand  magnetic lasso  marquee  polygonal lasso  quick mask 6. If you used more than one selection tool, what was the secondary selection tool you used? 7. Describe briefly how you made the selection, for example, the settings you used to set the tool's option. 8. Discuss any problems in the process. Lab: Digital Image Alteration :: Page 4 of 4
  • 9. Answers to an accompanying worksheet for the book: Digital Media Primer, Yue‐Ling Wong. Copyright (c)2015 by Pearson Education, Inc. All rights reserved. Answers for Worksheet: Printing DPI vs. Image PPI 2. How does the printer DPI affect the output physical dimension of your printed image? no effect 3. How does the printer DPI affect the print quality (how noticeable the printer dots are) of your printed image? higher DPI: the printer dots are less noticeable 4. How does the printer PPI affect the output physical dimension of your printed image? higher PPI: smaller printout 5. How does the printer PPI affect the print quality (how noticeable the printer dots are) of your printed image? no effect
  • 10. Answers to an accompanying worksheet for the book: Digital Media Primer, Yue‐Ling Wong. Copyright (c)2015 by Pearson Education, Inc. All rights reserved. Worksheet: JPEG Compression Artifact Application Program Required Adobe Photoshop 5.5 or later Objectives 1. To take a closer look at the JPEG artifact. 2. To learn where JPEG artifact is most visible. Introduction JPEG is a common file format for Web images. Many digital cameras also save digital photographs directly in JPEG format, which, for some cameras, may be the only choice of the file format. Have you noticed any ugly artifact in some JPEG images? If you are posting your portfolio of art work as JPEG images on the Web, you should understand how the JPEG compression affects your image quality and how to minimize the artifact. The example image you will use in this exercise has many solid color areas and edges where sharp color changes occur. It is not the type of images that JPEG compression is best for because the JPEG compression artifact is more pronounce. However, this will make it easy for you to see the artifact in this exercise. Instructions A sample image, called solid-color-ex.tif, can be downloaded from the companion Web site of the book. Look under JPEG Compression Artifact. This example image is a TIF file with no image compression. The image is made up of large areas of solid colors and gradients. I. Compression Quality and File Size 1. Open the image with Adobe Photoshop, and convert this image into JPEG files with different compression level. 2. If you have access to Photoshop 5.5 up to CS2, choose File > Save for Web… If you have Photoshop CS3 or later, choose File > Save for Web & Devices... 3. Click the 4‐Up tab (Figure 4 and Figure 5, on the last page of this worksheet), so you can see the original TIF image and three optimized images of different JPEG compression settings simultaneously. 4. Click on each of these three different optimizedimages, andselect JPEG from the Optimized File Format dropdown menu. Then select from the Compression Quality dropdown Low, Medium, and Maximum. 1. Note down in the table the file sizes and the time to transfer the file over a specific network connection speed: Compression Quality FileSize (KB) Transfer Time (sec.) at what Network Connection Speed Original TIF ‐‐‐‐‐‐‐ Low smallest should be the shortest Medium Maximum largest should be the longest 2. Which compression quality among the three in the table above gives the best image quality? Maximum 3. Which compression quality among the three in the table above gives the worst image quality? Low Page 1 of 6
  • 11. 5. Zoom in the images to look closely and compare the original TIF image with the three optimized images. Do you see the difference? 4. Where are the artifacts most visible? A A. At the intersection of very different colors B. Within a solid color away from the edge of the color 6. Select the optimized image that has the Compression Quality set to Maximum; you can also directly set the Quality to 100. Save the optimized image as max.jpg. II.Take aCloser LookattheJPEGImage Openthismax.jpgfileinPhotoshop.Itmaylookthesame asthe originalTIFimage tothenakedeyes.However, some colorsare altered,especiallythe pixelsaroundtheedgeswhere sharp changesofcolorsoccur. Trythese: 1. Use the Magic Wand selection tool, with its Tolerance set to zero, click to select a solid color area in the original TIF image. The circumference of the selection should follow nicely around the outline of that solid color area (Figure 1a). 2. Now, try the same on the max.jpg. How is the shape of the selection? Most of the middle area is in the selection but the edge around the solid color is not. And, the selection outline is a little jagged (Figure 1b). (a) (b) Figure 1 5. Why can you tell from the observation in the above steps that themax.jpgisnotexactly the same as the original TIF? (First, what does setting the Tolerance of Magic Wand to zero means?) TheTolerance of the Magic Wand toolbeingzero enforces thatitonlyselectsone single color. The above steps demonstrate that the originally solid color area is not anymore a single solid color in the max.jpg. Otherwise the whole solid color area would have been selected with the Magic Wand tool at Tolerance set to zero. Lower compression quality settings can impose very visible alternations on the image, but the Maximum setting causes only indiscernible alterations. The Maximum setting gives larger file size but it is still much smaller than the original TIF. Page 2 of 6
  • 12. But how would this affect the way you create your digital images? This affects how you use the image. For example, any images that are intended for further editing should not be kept in JPEG format because every time you save a JPEG file, it gets altered even if you have not changed anything. (See the following sections) III. Resaving a JPEG Even at100% Will Alter the Image 1. Open max.jpgin Photoshop and save it as max2.jpg. You can choose the Maximum compression quality. 2. Close the file and open the max2.jpgin Photoshop. Since the compression quality is set toMaximum, the alternation caused by the JPEG artifact isindiscernible. Tosee if max2.jpgis really altered from max.jpg, try the following: i. Use the Magic Wand selection tool, again with its Tolerance set to zero, click to select a solid color area in the max.jpg. Fill the selection with a distinctive color, such as black. (Edit > Fill…) ii. Now, try the same on the max2.jpg. iii. Zoom in both max.jpgand max2.jpg. Compare the newly filled color shapes. They are different! IV. Resaving a JPEG Will Lower the Quality Open the original TIF file in Photoshop and save it as JPEG at the compression quality set to zero. Name the new file as max0.jpg. Openthismax0.jpginPhotoshop.Zoomintheimageto600%.Youwillseethatthecolorsseemtobegroupedin square blocks (Figure 2). Figure2 6. Do all the square blocks have the same pixel dimension? Yes 7. What is the pixel dimension of the square blocks? (There are many ways to find out the pixel dimension of the square blocks. One way is to use a Rectangular Marquee Tool to make a selection around a square block. Then, look at the Info palette for the width and height of the selection.) 8 pixels 8 pixels Why are the colors grouped in square blocks of such a pixel dimension? It is related to the JPEG compression algorithm—how it compresses the image file. For the sake of making the artifact more visible, we have you save a JPEG at zero compression quality. You may also see such artifact in other JPEG files, especially those are saved at low compression quality or have been saved as JPEG over and over. If you are interested in learning more about the JPEG compression algorithm, an in‐depth discussion can be found in the digital imaging chapter of the Computer Science Module. Page 3 of 6
  • 13. V.Resaving a JPEG at100%WillNOTRecover the Quality With thismax0.jpgstill open in Photoshop, save it asmax0max.jpgby setting the Compression Quality to Maximum. Open max0max.jpgin Photoshop and note its image quality. 8. The image quality of max0max.jpgis: B A. recovered,andisasgoodas,oralmostasgoodas,themax.jpg–the JPEGsaved directly from the original TIF at the maximum compression quality. B. worse than max0.jpg, or at least there is not any observable improvement over max0.jpg. VI. Summary and Conclusions 9. True/False: Saving an image as JPEG at lower compression quality for Web images can reduce the image's network transfer time. T 10. True/False: One should keep the original image for further image editing. T 11. True/False: The quality of an image file that is saved as JPEG over and over at the maximum compression quality is as good as saving the file as PSD (Photoshop file). F 12. True/False: An image that is saved as JPEG at any compression quality can be recovered to the original quality any time by re‐saving it in another uncompressed file format such as Photoshop PSD. F 13. True/False: JPEG is a compressed file format. T 14. True/False: JPEG uses a lossless compression, i.e. no information is lost during compression. F 15. True/False: JPEG file format is best suited for high contrast images or those with sharp color changes throughout the image. F 16. Name one file format, in addition to PSD (Photoshop), that will not cause degradation in image quality. for examples, TIF, PNG, BMP 17. The most visible JPEG artifact occurs at _the edges where sharp color changes occur . Page 4 of 6
  • 14. File size information and network connection speed and transfer time can be found below the optimized image Optimized File Format Zoom Tool 4‐UpTab Compression Quality Compression Quality Figure 3. Save for Web … dialog box in Adobe Photoshop CC2014. File size information and network connection speed and me can e oun e optimized image Compression Quality Optimized File Format lity Zoom Tool 4‐Up Tab Compr ua Figu
  • Recommended
    View more...
    We Need Your Support
    Thank you for visiting our website and your interest in our free products and services. We are nonprofit website to share and download documents. To the running of this website, we need your help to support us.

    Thanks to everyone for your continued support.

    No, Thanks
    SAVE OUR EARTH

    We need your sign to support Project to invent "SMART AND CONTROLLABLE REFLECTIVE BALLOONS" to cover the Sun and Save Our Earth.

    More details...

    Sign Now!

    We are very appreciated for your Prompt Action!

    x