SD+&+D+Bitmapped+Graphics

media type="custom" key="27903415"


 * Task**

1. Use a bitmapped graphics program to edit a photograph / image. 2. Write a description of 6 tools that you used in part 1.


 * Questions**

1. Describe three disadvantages of storing graphics in bit-mapped form.

2. Describe two advantages of storing graphics in bit-mapped form.

3. What is meant by the term bit-depth?

4. What does the expression "True Colour" mean?

5. What would be the uncompressed file size of a 4 inch by 5 inch photograph scanned at 800 dpi using 256 colours.

6. What would be the uncompressed file size of a 3 inch by 4 inch photograph scanned at 1200 dpi using 8 colours.

7. What would be the uncompressed file size of a 6 inch by 5 inch photograph scanned at 1200 dpi using 24 bit colour depth.

8. What would be the uncompressed file size of a 6 inch by 8 inch photograph scanned at 1600 dpi using true colour.


 * National 5 Questions **

1. What is the most basic component of any computer graphic?

2. What does the expression "DPI" mean?

3. What would be the effect of increasing an images DPI?

4. Describe two advantages of storing graphics in bit-mapped form.

5. Describe three disadvantages of storing graphics in bit-mapped form.

6. An image is 800 pixels by 600 pixels. It uses one byte to store the colour of each pixel. Calculate the storage requirements of the image.

7. An image is 1000 pixels by 800 pixels. It has 8 bit colour depth. Calculate the storage requirements of the image.

8. An image is 400 pixels by 400 pixels. It uses two bytes to store the colour of each pixel. Calculate the storage requirements of the image.

9. An image is 900 pixels by 500 pixles and 16 bit colour depth. Calculate the storage requirements of the image.

10. A 256 colour image is 2000 pixels by 1500 pixels. Calculate the storage requirements of the image.