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






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






3. What is high-pass filtering also called?






4. What permit input/output of information to or from the CPU?






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






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






7. What was the earliest computer device called?






8. Increased noise = _____ image contrast.






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






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






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






12. What are devices that process information?






13. Which type of information consists of collected facts?






14. A larger matrix provides ____ pixels.






15. What modalities are array processors useful for?






16. 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.






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






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






19. Noise is measured as what?






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






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






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






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






24. Binary systems operate with a ___-symbol language.






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






26. Noise is measured as what?






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






28. A low contrast image has a ___ frequency.






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






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






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






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






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






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






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






36. What does DICOM stand for?






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






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






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






40. Computer programs are called what?






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






42. Fluoroscopic noise mostly comes from what?






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






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






45. 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?






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






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






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






49. 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.






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