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






2. Increased noise = _____ image contrast.






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






4. What is the name for a binary digit?






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






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






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






8. A high contrast image has a ___ frequency.






9. Computerized digital images are described in terms of what






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






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






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






13. Noise is ____ related to contrast.






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






15. 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?






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






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






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






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






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






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






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






23. 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?






24. What is high-pass filtering also called?






25. What are the two ways detectors acquire information?






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






27. What determines resolution?






28. Computers operate from ____ ____ language.






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






30. What is an individual matrix box or picture element?






31. What are devices that process information?






32. When was ENIAC invented?






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






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






35. What are devices that process information?






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






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






38. Medical imaging is often achieved from information that has been processed by what?






39. Noise is ____ related to contrast.






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






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






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






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






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






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






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






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






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






49. 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.






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