Test your basic knowledge |

Digital Image Processing

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Because the range of stored densities is so much wider than the visual range - any digital image is only a small part of the total data obtained - each image is a _____ on the total range of data.






2. What are the two types of information computers use?






3. What is the random background information that does not contribute to the image quality?






4. Each pixel is capable of representing a wide range of what?






5. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.






6. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?






7. Digital detectors are capable of producing ______ shades of gray.






8. In what time period did microchip technology come out?






9. What type of memory storage devices are required for large amounts of data?






10. What is the equation for determining gray scale bit depth?






11. Digitalization of analog information (increases / reduces) the quality and quantity of information?






12. What is an individual matrix box or picture element?






13. What are the two most common output devices?






14. Computers operate from ____ ____ language.






15. What permit input/output of information to or from the CPU?






16. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.






17. What is the raw data to which a Fourier Transformation is applied to create the digital image?






18. What are the two most common output devices?






19. If window width increases - image contrast will ____.






20. Computer memory is often rated in terms of total ____ memory.






21. What is high-pass filtering also called?






22. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.






23. A high contrast image has a ___ frequency.






24. What is a square series of boxes that gives form to the image?






25. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.






26. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.






27. What is the name of the 'modern electronic computer'?






28. Because the range of stored densities is so much wider than the visual range - any digital image is only a small part of the total data obtained - each image is a _____ on the total range of data.






29. What is the random background information that does not contribute to the image quality?






30. Computer programs are called what?






31. In what time period did microchip technology come out?






32. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?






33. Resolution is controlled by what?






34. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.






35. What is the equation for determining gray scale bit depth?






36. Noise is ____ related to contrast.






37. What changes the pixel value by addition or subtraction and controls image density?






38. The computer either ____ or ____ selected frequencies during the filtering process.






39. Which computers handle data composed of definite quantities of current?






40. What can memory be transferred as?






41. Which computers handle data composed of continuously varying electrical currents?






42. What input device do radiographers use on a normal basis?






43. Which type of information consists of operating instructions?






44. What is the 'heart' of every computer?






45. When was ENIAC invented?






46. Noise is measured as what?






47. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.






48. What is the raw data to which a Fourier Transformation is applied to create the digital image?






49. A larger matrix provides ____ pixels.






50. Which computers handle data composed of definite quantities of current?