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






2. Fluoroscopic noise mostly comes from what?






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






4. What is an image that has been converted into numerical values for transmission or processing?






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






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






7. What are the two ways detectors acquire information?






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






9. 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.






10. Modalities differ in bit depth that is available depending on the capabilities of what?






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






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






13. Increased noise = _____ image contrast.






14. 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.






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






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






17. What does DICOM stand for?






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






19. Noise is measured as what?






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






21. What was the earliest computer device called?






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






23. Computers operate from ____ ____ language.






24. A low contrast image has a ___ frequency.






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






26. What is the name for a binary digit?






27. A high S/N indicates ___ noise in the image.






28. What directs information to and from various parts of the computer?






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






30. 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?






31. Computerized digital images are described in terms of what






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






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






34. What is high-pass filtering also called?






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






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






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






38. Noise is measured as what?






39. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?






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






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






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






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






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






45. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?






46. Computer equipment is called what?






47. 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?






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






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






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