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 'heart' of every computer?






2. Window width and contrast have an ____ relationship.






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






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






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






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






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






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






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






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






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






12. What is high-pass filtering also called?






13. 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.






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






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






16. Increased noise = _____ image contrast.






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






18. 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?






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






20. If the window level increases - density will _____.






21. Which type of information consists of collected facts?






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






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






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






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






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






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






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






29. What is required for collection of input information?






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






31. Noise is ____ related to contrast.






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






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






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






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






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






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






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






39. What type of scanning increases resolution but can't be used in real-time dynamic studies?






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






41. Which computers handle data composed of continuously varying electrical currents?






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






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






44. What determines resolution?






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






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






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






48. What does DICOM stand for?






49. Resolution is controlled by what?






50. 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.