Olympus DP70 Podręcznik użytkownika - Strona 24

Przeglądaj online lub pobierz pdf Podręcznik użytkownika dla Aparat cyfrowy Olympus DP70. Olympus DP70 38 stron. Application software

In this dialog box, check

whether correction

images of the

Dark

the

Flatfield

type, are

available.

Definition "Shad-

Every optical system with a camera and microscope creates, even when the devices

ing"

have been set up very carefully, image inhomogeneities in the illumination of the

sample. These are called shading.

The left illustration

shows an image where

the online shading

correction has not been

activated. In compar-

ison to the image on the

right, one can notice the

inhomogoneities in the

illumination.

For a shading correction, the shading will first be determined in order to be able to

make corrections to the acquired image. To determine which shading there is in the

image, two types of correction images will be acquired:

Dark correction

The

image

Here, pixels with different brightness resulting from noise or different sensitivity of

individual pixels on the camera chip can be corrected by the correction image. The

Dark correction image

once. It is valid for all objectives.

Flatfield correction

On the

image

out a sample will be shown. An individual correction image must be made for every

objective and for every resolution of your camera.

Dark correction image

is an acquisition during which no light falls on the camera.

is characteristic for each camera and needs only be acquired

Flatfield correction image

the illumination of the complete optical system with-

Camera settings