Chapter 10: Working with Images

    

10.1	Assume you anticipate placing a 35-inch photograph on your organization's Web site. You first use a 600-dot-per-inch scanner with a 24-bit color depth to scan the image onto a file. Determine the amount of storage required to store the image. Next, assuming a majority of customers access your Web site using 56-Kbps modems and the transmission overhead is 15 percent, how long will it take to download the image?
10.2	Assuming the image parameters described in Problem 10.1, and assuming you converted the image to JPEG and achieved a 30:1 data reduction, what would be the effect on modem downloads?
10.3	Jimmy just sent you a postcard of downtown Macon. It is so quaint that you decided to post it on your Web site. You decide to set your scanner to a resolution of 300 dots per inch vertical and horizontal. Assuming you scan the 35-inch postcard using a 24-bit color depth, what storage (in bytes) will be required if no compression occurs?
10.4	Assume your organization operates a popular Web server. That server has a JPEG picture on its home page that requires 200,000 bytes of storage while the text on the page requires 1000 bytes. Assume your server receives 30,000 hits per day. Also assume that your organization's ISP bill for Internet access is $1200 per month plus $0.01 per Mbyte transmitted per month. What is the monthly cost for Internet access, assuming all hits are to the home page and there are 30 days in the month? Assume you use a tool to compress and/or crop the JPEG to 50,000 bytes. What is the effect on the cost of monthly Internet access?
10.5	You just purchased a Bozo scanner that can be set to scan images at 150, 300, 450, and 600 dots per inch. Your just picked up the color photographs from your vacation in Tibliz and noted the monument to CVS was outstanding and would like to place it on your corporate Web page. You scanned the 35-inch photograph using a resolution of 300 lines per inch and a color depth of 30 bits per pixel. Your corporate Web home page is currently all text and has 1500 bytes of data. What is the storage (in bytes) required for placing the monument to CVS on your corporate Web page?