Test your basic knowledge |

Digital Image Processing

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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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 a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?






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






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






4. It is important that the radiographer understand anatomy from different perspectives due to the methods of digital processing and image information? What are the 3 perspectives?






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






6. What are the two most common output devices?






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






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






9. A low contrast image has a ___ frequency.






10. When was ENIAC invented?






11. What does a 1 in binary code stand for?






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






13. What are the two most common output devices?






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






15. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained






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. Window width and contrast have an ____ relationship.






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






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






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






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






22. When was ENIAC invented?






23. Computer equipment is called what?






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






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






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






27. What is the digital standard for imaging that is designed to ensure that all equipment fro all manufacturers who choose to adhere to the standard are speaking the same computer language?






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






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






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






31. 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.






32. Computers operate from ____ ____ language.






33. What does a 1 in binary code stand for?






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






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






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






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






38. What is high-pass filtering also called?






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






40. Resolution is controlled by what?






41. Noise is measured as what?






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






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






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






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






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






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






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






49. A high contrast image has a ___ frequency.






50. Computer equipment is called what?







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