Manual FPN Correction

Manual Fixed Pattern Noise Correction

The correction of fixed pattern noise is quite easy with the FLI Pilot

application. The following sequence of steps will guide you through the

process of correcting fixed pattern noise.

Generating a Master Dark Frame

1. Open the Stack Frames menu of Tester Routines. (Figure 1)

2. Enter the desired quantity of frames you wish to produce. 20 is

generally an acceptable number.

3. Select your desired exposure. The generated set of stack frames

can only be used to correct images with the same exposure as the

stack, so one will likely want to produce multiple stacks in the case of

multiple exposure durations being used.

4. The subsequent settings can be left at their default, however, you

can reference the Tester Routine page for information regarding

possible configuration.

5. Press start to begin capture and production of a stacked frame.

(Figure 2)

6. Save the stacked frame with File ⟶ Save As …

Correcting Fixed Pattern Noise

1. Enter the Frames Difference menu of Tester Routines. (Figure 3)

2. Use Browse to select a reference file. This will be the image

previously saved as a result of the stacked frame generation.

3. Select a source file, which will be the image you wish to remove FPN

from.

4. Confirm that neither the Use Histogram Cutoffs nor the Use

Difference Factors boxes are enabled. In a case where these settings

are required, reference the Tester Routine page for information

regarding their functions.

5. Select Start to generate the final image (Figure 4), which can then be

saved.

Finger Lakes Instrumentation
200 Tech Park Drive
Rochester NY 14623 USA

Phone: 585-624-3760
Email: sales@flicamera.com
Web: https://flicamera.com

Figure 2: Stacked Frames

Figure 1: Stack Frames

Figure 3: Frames Difference

Figure 4: Final Image

Note:

These aspects of imaging must

remain constant between a master

dark frame and final image:

• Gain

• Exposure Time

• Sensor

• Temperature