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






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






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






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






5. What is the frequency response of the incoming signal called?






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






7. What modalities are array processors useful for?






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






9. Which type of information consists of operating instructions?






10. What does DICOM stand for?






11. Computer equipment is called what?






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






13. What are the two ways detectors acquire information?






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






15. Computer programs are called what?






16. When was ENIAC invented?






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






18. What determines resolution?






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






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






21. A larger matrix provides ____ pixels.






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






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






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






25. What is high-pass filtering also called?






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






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






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






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






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






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






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






33. Which type of information consists of operating instructions?






34. What are the two ways detectors acquire information?






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






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






37. A low contrast image has a ___ frequency.






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. Fluoroscopic noise mostly comes from what?






40. What are devices that process information?






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






42. Increased noise = _____ image contrast.






43. 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.






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






45. What are devices that process information?






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






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






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






49. What is required for collection of input information?






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