Meade Image Processing Spécifications télécharger pdf (Page 30)

20 AUTOSTAR CCD PHOTOMETRY

6. A Calibrate window will be displayed (Fig. 3-4) where you can

select and include a Bias, Dark Frame, and a Flat field image. If

you have used the Auto Dark Subtraction option while taking

images, or if the exposure time is less than 1 second, you do not

need to use another dark frame. If you have used a dark frame

when taking the images, the Bias image is not needed.

Figure 3-4. Calibrate Window.

Note: This will create a new file called NewImageGroup.lst. Do

not move or rename this file. This is not a text file and cannot be

opened. Just let it be, as it defines the Calibration for the files in

the Group.

7. Select the Flat Field you wish to use to calibrate with (e.g.,

click on Select Flat Field and find the flat field for the filter used

for the images to be calibrated – for instance, FV for the V filter

images). Click the Include Flat Field box, and if desired the

Include Bias button (after selecting the Bias image). Remember

that the Dark Frames have already been used on the fly when the

images were exposed (if the Auto Dark Subtract option was

selected). Also, the Bias Frame data is included as part of the

Dark Frame. Click on OK.

8. The program will now automatically calibrate all the images and

save the newly-calibrated images with new names (e.g.,

Calibrated_"file name"). The original (uncalibrated) images will

be left untouched. (See Fig. 3-5.)

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Meade Image Processing Spécifications Page 30