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. Computerized digital images are described in terms of what






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






3. What does DICOM stand for?






4. There is a ___ relationship between subject contrast and acquired data contrast.






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






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






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






8. A low contrast image has a ___ frequency.






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






10. 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.






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






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






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






14. Increased noise = _____ image contrast.






15. What is high-pass filtering also called?






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






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






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






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






20. What is the name for a binary digit?






21. What is required for collection of input information?






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






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






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






25. What was the earliest computer device called?






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






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






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






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






30. What does DICOM stand for?






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






32. Computer equipment is called what?






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






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






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






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






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






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






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






40. Computer programs are called what?






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






42. Computers operate from ____ ____ language.






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






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






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






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






47. 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.






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






49. A larger matrix provides ____ pixels.






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