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






2. Which type of information consists of operating instructions?






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






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






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






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






7. The _____ the matrix size - the better the resolution.






8. 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?






9. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.






10. Who or What is responsible for density changes on a digital image? On a manual image






11. What is the primary limitation with the resolution on digital images?






12. What determines resolution?






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






14. Window width and contrast have an ____ relationship.






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






16. The quality of the data acquired from the IR is measured by what three data characteristics?






17. Noise is measured as what?






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






19. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained






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






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






22. 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?






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






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






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






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






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






28. Computers operate from ____ ____ language.






29. What can memory be transferred as?






30. A low contrast image has a ___ frequency.






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






32. A high contrast image has a ___ frequency.






33. Changes in window width are sometimes called gray scale ____ or ____.






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






35. What is the measure of the differences between the data values referred to as?






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






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






38. Window width and contrast have an ____ relationship.






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






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






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






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






43. What changes the pixel value by multiplication or division and controls image contrast?






44. Noise is ____ related to contrast.






45. What type of scanning increases resolution slightly by scanning all 525 lines in order?






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






47. What does DICOM stand for?






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






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






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