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






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






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






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






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






6. What is the 'noisiest' component of a digital system?






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






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






9. Computer programs are called what?






10. Computer programs are called what?






11. What are devices that process information?






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






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






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






15. Computer equipment is called what?






16. What is high-pass filtering also called?






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






18. If the window level increases - density will _____.






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






20. Increased noise = _____ image contrast.






21. When was ENIAC invented?






22. What is critical to how fast the computer system can function?






23. Noise is ____ related to contrast.






24. Around what time did digital computerization come out for CT and US?






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






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






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






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






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






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






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






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






33. What are the two ways detectors acquire information?






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






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






36. A high contrast image has a ___ frequency.






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






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






39. Which type of information consists of operating instructions?






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






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






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






43. What type of scanning increases resolution but can't be used in real-time dynamic studies?






44. What is the name for an 8-bit word?






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






46. Computer equipment is called what?






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






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






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






50. When was ENIAC invented?