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Digital Image Processing

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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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. Each pixel is capable of representing a wide range of what?






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






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






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






5. Computer equipment is called what?






6. What modalities are array processors useful for?






7. What are the 3 classifications of digitized image filters?






8. A larger matrix provides ____ pixels.






9. What is the name of the 'modern electronic computer'?






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






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






12. What are the 3 classifications of digitized image filters?






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






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






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






16. A larger matrix provides ____ pixels.






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






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






19. 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?






20. What determines resolution?






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






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






23. What directs information to and from various parts of the computer?






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






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






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






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






28. Increased noise = _____ image contrast.






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






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






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






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






33. When was ENIAC invented?






34. What 3 things were required prior to digital computer applications in medical imaging?






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






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






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






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






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






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






41. What was the earliest computer device called?






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






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






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






45. What are the two ways detectors acquire information?






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






47. What determines resolution?






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






49. When detectors acquire their information by ____ they are receiving info from a specific area.






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







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