Image Processing Toolbox User's Guide |

**Plotting the Radon Transform**

You can compute the Radon transform of an image I for the angles specified in the vector `theta`

using the `radon`

function with this syntax.

The columns of `R`

contain the Radon transform for each angle in `theta`

. The vector `xp`

contains the corresponding coordinates along the *x*´-axis. The center pixel of `I`

is defined to be `floor((size(I)+1)/2)`

; this is the pixel on the *x*´-axis` `

corresponding to .

The commands below compute and plot the Radon transform at 0° and 45° of an image containing a single square object. `xp`

is the same for all projection angles.

I = zeros(100,100); I(25:75, 25:75) = 1; imshow(I) [R,xp] = radon(I,[0 45]); figure; plot(xp,R(:,1)); title('R_{0^o} (x\prime)')

**Radon Transform of a Square Function at 0 Degrees
**

**Radon Transform of a Square Function at 45 Degrees
**

Radon Transform | Viewing the Radon Transform as an Image |

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