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 is the information stored as magnetic variations referred to as?






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






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






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






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






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






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






8. Noise is measured as what?






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






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






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






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






13. A __ _____ disk will store over 10000000 bytes of information.






14. A high contrast image has a ___ frequency.






15. What is the name for a binary digit?






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






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






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






19. When was ENIAC invented?






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






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






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






23. What was the earliest computer device called?






24. What was the earliest computer device called?






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






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






27. A larger matrix provides ____ pixels.






28. What are the two ways detectors acquire information?






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






30. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?






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






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






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






34. 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.






35. A low contrast image has a ___ frequency.






36. All medical imaging is achieved with which type of computers?






37. Increased noise = _____ image contrast.






38. What are the two ways detectors acquire information?






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






40. Which type of information consists of collected facts?






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






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






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






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






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






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






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






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






49. What is required for collection of input information?






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