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 are the 3 classifications of digitized image filters?






2. Increased noise = _____ image contrast.






3. Computers operate from ____ ____ language.






4. Noise is ____ related to contrast.






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






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






7. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.






8. What is high-pass filtering also called?






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






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






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






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






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






14. 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?






15. DICOM imaging now includes compatibility via a database system that includes linage of the patient images with the patient's EMR. This database system is called what?






16. When was ENIAC invented?






17. What determines resolution?






18. Window width and contrast have an ____ relationship.






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






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






21. Computer equipment is called what?






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






23. What is the mathematical algorithm used to create all medical images?






24. Which type of filter amplifies or deletes all but a selected range or band of frequencies and is useful in the elimination of characteristic emission peaks?






25. Which memory can only be extracted without alteration; cannot change?






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






27. What can memory be transferred as?






28. The ____ is the heart of the computer while the ___ is the vessels.






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






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






31. What was the earliest computer device called?






32. Resolution is controlled by what?






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






34. What is the information stored as magnetic variations referred to as?






35. What is the digital standard for imaging that is designed to ensure that all equipment fro all manufacturers who choose to adhere to the standard are speaking the same computer language?






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






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






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






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






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






41. The ____ is the heart of the computer while the ___ is the vessels.






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






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






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






45. Because electrical currents are understood as being either on or off - the binary system consists of information recorded as either a _ for off or a _ for on.






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






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






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






49. Noise is measured as what?






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