Q1).

What is a pixel?

Q2). Explain the Nyquist sampling theorem.

If the signal is of f=21 Hz and is sampled with fs =10Hz, then the resulting (aliased) frequency would be?

Q3).

For an image the root mean square pixel intensity of a region of interest is 500. The root mean square average of the noise for this image is 10. What is the signal to noise

ratio?

Q4).

What is the dynamic range of an 8 bit, 12 bit, and 16 bit monochrome imaging system if the noise is 2?

Q5).

Consider an organ with a tumor is imaged. In the resulting image, the organ has intensity I_O, and the tumor has intensity I_t > I_O. Which of the following methods can improve the local contrast if the organ is treated as background:

a. Multiplying the image by a constant .

b. Subtracting a constant 0

Q6).

If the full wave half-maximum of the input wave of an imaging system is 1.5 micrometer, what is the minimums distance over which you can distinguish two points?