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. What provides specific instructions for calculations and sequential steps to be followed?






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






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






4. Which memory replaces new information with the old; can change?






5. Computer equipment is called what?






6. A high contrast image has a ___ frequency.






7. A __ _____ disk will store over 10000000 bytes of information.






8. Resolution is controlled by what?






9. What are the 3 classifications of digitized image filters?






10. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?






11. All medical imaging is achieved with which type of computers?






12. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?






13. Computerized digital images are described in terms of what






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






15. When detectors acquire their information by ____ they are receiving info from a specific area.






16. What does a 0 in binary code stand for?






17. Noise is ____ related to contrast.






18. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?






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






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






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






22. The human visual range is ___ or fewer shades of gray.






23. What 3 things were required prior to digital computer applications in medical imaging?






24. A high contrast image has a ___ frequency.






25. Fluoroscopic noise mostly comes from what?






26. When detectors acquire their information through ____ they are receiving all the info at once.






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






28. The number of shades of gray is determined by what?






29. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?






30. It is important that the radiographer understand anatomy from different perspectives due to the methods of digital processing and image information? What are the 3 perspectives?






31. Computers operate from ____ ____ language.






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






33. Which type of information consists of operating instructions?






34. What is the system of conductors that connects the various components of a computer system and permits the CPU to accept inputs from any point along the conductor?






35. Medical imaging is often achieved from information that has been processed by what?






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






37. When subject contrast is high - the acquired data contrast will be ____.






38. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?






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






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






41. A low contrast image has a ___ frequency.






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






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






44. What are the two most common output devices?






45. What is high-pass filtering also called?






46. In what time period did mathematical theory and solid-state electronics come out?






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






48. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?






49. What is the system of conductors that connects the various components of a computer system and permits the CPU to accept inputs from any point along the conductor?






50. 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.