Post Process

Post Process Settings

The post process panel is used to control automatic fixed pattern noise correction and flat field correction.

Fixed pattern noise (FPN) is a type of noise generated during the imaging of long exposure images. A detailed account of fixed pattern noise can be found at Fixed Pattern Noise Correction. The ability to apply fixed pattern noise correction to previously captured images is detailed at Manual Fixed Pattern Noise Correction.

Flat field correction (FFC) is a correction for non-uniform lighting across the sensor. This occurs most often when lenses are used that focus more light towards the center of the sensor than the outer edges and corners. More information on flat field correction is available at Flat Field Correction. The option to apply flat field correction to images already taken and saved is available at Manual Flat Field Correction.

Note:

These aspects of imaging

must remain constant

between a master dark

frame and final image:

• Gain

• Exposure Time

• Sensor

• Temperature

Note:

These aspects of imaging

must remain constant

between master flat and final

image:

• Gain

• Lens

• Mean Pixel Value

Fixed Pattern Noise Correction

To apply FPN correction to an image being taken, select Subtract

Reference Files, then use Browse to select the high and low gain master

darks best for the images that will be taken. A master dark needs to have

been taken with the same gain, exposure time, and sensor temperature to

produce high quality results. More information on master dark frames is

available at Fixed Pattern Noise Correction.

The FPN corrected image will be displayed when Subtract Reference Files

is checked.

Flat Field Correction

To apply FFC to an image being taken, select Apply Flat Frame Correction.

Use Browse to select the high and low gain master flat frames that are best

for the image being taken. A master flat frame needs to be taken with the

exact same hardware configuration, as well as the same gain settings and

mean pixel value as the image being taken. More information on master flat

frames is available at Flat Field Correction. Note that steps 1-6 must be

completed to generate a master flat frame, and thus must be done prior to

using this feature to apply flat field correction automatically.

The flat field corrected image will be displayed when Apply Flat Frame

Correction is checked.

Finger Lakes Instrumentation
200 Tech Park Drive
Rochester NY 14623 USA

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