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






2. Noise is ____ related to contrast.






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






4. What type of memory storage devices are required for large amounts of data?






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






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






7. 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.






8. 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?






9. Noise is measured as what?






10. Noise is measured as what?






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






12. What can memory be transferred as?






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






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






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






16. When was ENIAC invented?






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






18. A larger matrix provides ____ pixels.






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






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






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






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






23. A high contrast image has a ___ frequency.






24. What determines resolution?






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






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






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






28. Computer programs are called what?






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






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






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






32. Increased noise = _____ image contrast.






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






34. What determines resolution?






35. 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.






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






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






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






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






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






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






42. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.






43. 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.






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






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






46. Computers operate from ____ ____ language.






47. What modalities are array processors useful for?






48. 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?






49. What are devices that process information?






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