User manual

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24 Chapter 2. Using IDEA

Figure 2.12: Calibration panel.

• Erase current pair: erases the current image pair;

• Calibrate

: starts the calibration procedure once ﬁnished the image acquisition cycle; the proce-

dure elaborates on the acquired data and determines the operational parameters of the scanner. On the

right panel are shown the residual error stats at the end of calibration;

• Conﬁrm calibration

: the user conﬁrms the calibration that is internally saved and can be used to

operate with the scanner;

• Exit calibration mode

: terminates at any moment the calibration process and gets back to the

acquisition or optical setup.

For the complete calibration procedure the user has to take images of the calibration master in 9 different

positions; the user him/herself should put the master in these positions (Figure 2.13) or move the scanner to

match the positions:

1. master orthogonal to the scanner

: initially the master is in a frontal position; to start the procedure

push the button Start calibration; the parameters of light intensity and framed ﬁeld are set; to acquire

the ﬁrst pair of images by clicking on Acquire images pair; to conﬁrm and get to the following position

press Next pair;

2. master tilted to the left

: tilt the master approximately 15~20

to the left, try to maintain the frame in

the center of the master and acquire the second pair of images; to conﬁrm and get to the following

position click on Next pair;

3. master tilted to the right: tilt the master approximately 15~20° to the right starting from position 1,

try to maintain the frame in the center of the master and acquire the third pair of images; to conﬁrm

and get to the following position click on Next pair;

4. master seen from the bottom

: put the master in position 1 and lower the scanner so that it frames

the master from the bottom at and angle of approximately 15~20

; try to maintain the frame in the

center of the master and acquire the fourth pair of images; to conﬁrm and get to the following position

click on Next pair;

5. master seen from the bottom and tilted to the left

: put the master as in position 2; try to maintain

the frame in the center of the master and acquire the ﬁfth pair of images; to conﬁrm and get to the

following position click on Next pair;

6. master seen from the bottom and tilted to the right

: put the master as in position 3; try to maintain

the frame in the center of the master and acquire the sixth pair of images; to conﬁrm and get to the

following position click on Next pair;

7. master seen from the top

: put the master in position 1 and lift the scanner so that it frames the master

from the top at and angle of approximately 15~20

; try to maintain the frame in the center of the

master and acquire the seventh pair of images; to conﬁrm and get to the following position click on

Next pair;

8. master seen from the top and tilted to the left

: put the master as in position 2; try to maintain the

frame in the center of the master and acquire the eighth pair of images; to conﬁrm and get to the

following position click on Next pair;

9. master seen from the top and tilted to the right

: put the master as in position 3; try to maintain