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






2. Which type of filter amplifies or deletes all but a selected range or band of frequencies and is useful in the elimination of characteristic emission peaks?






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






4. What is required for collection of input information?






5. 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.






6. Noise is ____ related to contrast.






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






8. What is high-pass filtering also called?






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






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






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






12. What modalities are array processors useful for?






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






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






15. Computers operate from ____ ____ language.






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






17. What was the earliest computer device called?






18. Changes in window width are sometimes called gray scale ____ or ____.






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






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






21. What is required for collection of input information?






22. Noise is ____ related to contrast.






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






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






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






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






27. Noise is measured as what?






28. Resolution is controlled by what?






29. Changes in window width are sometimes called gray scale ____ or ____.






30. What type of scanning increases resolution slightly by scanning all 525 lines in order?






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






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






33. What is the 'noisiest' component of a digital system?






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






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






36. What are the two most common output devices?






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






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






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






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






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






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






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






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






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






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






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






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






49. Window width and contrast have an ____ relationship.






50. Which type of filter amplifies or deletes all but a selected range or band of frequencies and is useful in the elimination of characteristic emission peaks?