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 does a 0 in binary code stand for?






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






3. Which type of filter amplifies or deletes all but the high frequencies - appears to increase contrast - and is useful in vascular imaging or digital mammo.






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






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






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






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






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






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






10. What is a square series of boxes that gives form to the image?






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






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






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






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






15. What is required for collection of input information?






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






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






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






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






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






21. Computerized digital images are described in terms of what






22. A larger matrix provides ____ pixels.






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






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






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






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






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






28. The quality of the data acquired from the IR is measured by what three data characteristics?






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






30. Which type of information consists of operating instructions?






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






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






33. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.






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






35. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?






36. 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?






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






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






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






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






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






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






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






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






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






46. DICOM imaging now includes compatibility via a database system that includes linage of the patient images with the patient's EMR. This database system is called what?






47. Computer programs are called what?






48. What are the two most common output devices?






49. Increased noise = _____ image contrast.






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







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