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






2. Resolution is controlled by what?






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






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






5. Window width and contrast have an ____ relationship.






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






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






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






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






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






11. Which memory can only be extracted without alteration; cannot change?






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






13. Computers operate from ____ ____ language.






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






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






16. 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?






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






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






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






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






21. Noise is measured as what?






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






23. Noise is measured as what?






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






25. Which type of information consists of collected facts?






26. 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?






27. Computer programs are called what?






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






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






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






31. Fluoroscopic noise mostly comes from what?






32. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?






33. What modalities are array processors useful for?






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






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






36. Which type of filter amplifies or deletes all but a selected range or band of frequencies and is useful in the elimination of characteristic emission peaks?






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






38. Changes in window width are sometimes called gray scale ____ or ____.






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






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






41. What input device do radiographers use on a normal basis?






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






43. 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?






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






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






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






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






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






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