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. Computers operate from ____ ____ language.






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






3. What can memory be transferred as?






4. Noise is measured as what?






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






6. Medical imaging is often achieved from information that has been processed by what?






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






8. When was ENIAC invented?






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






10. Noise is measured as what?






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






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






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






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






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






16. A high contrast image has a ___ frequency.






17. What was the earliest computer device called?






18. Computer programs are called what?






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






20. 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.






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






22. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.






23. What are the two types of information computers use?






24. What 3 things were required prior to digital computer applications in medical imaging?






25. Which type of information consists of collected facts?






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






27. Increased noise = _____ image contrast.






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






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






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






31. What are the two most common output devices?






32. Window width and contrast have an ____ relationship.






33. What modalities are array processors useful for?






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






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






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






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






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






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






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






41. A low contrast image has a ___ frequency.






42. What determines resolution?






43. 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?






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






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






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






47. When subject contrast is high - the acquired data contrast will be ____.






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






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






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