Ctrl+O opens a film with accurate exposure and not too many stars.
This film was shot on 20 13, 10, 18 at 9: 00 pm. This is a shooting activity of James Adelaide's seascape teaching group.
Shooting review: It was a full moon, and the moonlight shone brightly in the foreground, so I used ISO200, and I could get a good starry sky after exposure for 30 seconds. Of course, there were few stars on the moon at that time, so I didn't take a good picture of the Milky Way, but this kind of foreground illumination is very suitable for the orbit of stars.
Shooting parameters: 30 seconds f/f/2.8 ISO200 16mm.
Shooting equipment: Canon 5DM Mark III EF16-35mm F/2.8L II USM.
Step two:
Make some basic adjustments in Adobe Camera Raw. Select lens correction as shown below, and open the file after making some basic adjustments. The exposure increases by +0.50, the highlight increases by +50, and the definition increases by+10.
Third step
Ctrl +N copy or drag to a new file and use it later to mask the mixed foreground. Remember not to copy layers. Ctrl +J copy layer, 32 64 128 256 5 12 layer, the maximum stack does not need to be controlled by the power of 2, and how many layers you can set at will depends on the processing speed of your computer and the desired effect of star orbit. Longer and rounder orbits require more layers. Remember to take a snapshot in history, the second button, you can start again at any time.
I choose the layer 128 first. In fact, I can consider using a brightness mask to reduce noise before doing this, but my film was only shot in ISO200, which is basically clean, so I omitted this step. Brightness masking is a relatively high-order post-processing. If you don't understand, you can skip it directly.
Fourth step
Open the snowman plug-in and select the stack button.
Parameter interpretation:
Scaling refers to the scaling ratio of each photo relative to the previous photo, and rotation refers to the rotation angle.
The rotation radian of the star orbit is the number of photos (the number of layers copied) multiplied by the rotation angle filled in the plug-in.
For example, if the layer 128 is copied and rotated by 0.25, then the actual rotation of the star orbit is 128×0.25=32 degrees.
Three effects:
Only zoom is the radiation effect (meteor shower explosion)
Only the selected rotation is a circular effect (traditional star orbit)
Scale plus rotation is the orbit of a spiral star.
Fade-in is the fade-in and fade-out effect, which is controlled by dragging the button on the left of the slider and fades out on the right; Both changes are gradual.
Anchor point coordinates: the anchor point coordinates are the position of the rotation center point, and the x value is the abscissa. If you want to center, the photo banner pixels will be halved; The y value is the ordinate, that is, the height up and down. Vertical pixels ÷2÷3÷4, etc. can be used. Or a simpler method. I use the square selection tool (M) to select the center of the starry sky from the upper left corner of the picture. At this time, the coordinate value of the lower right corner of the box selection is determined, not necessarily the center position. You can try it at will.
Make a simple meteor shower explosion effect first. Parameter setting
Click Zoom Zoom Range: -0. 15
Click the fade-in range: 1- 10.
Enter the anchor coordinate 2780, 1850 and click the maximum button to start making. Choose a cigarette or a cup of tea according to your different floors and computer speed!
After about 10 minutes, the following effects are obtained:
Step five
Ctrl+ALT+SHIFT+E stamp all layers (this will be a long process), and then put them in a layer group, ready to wipe the foreground ship back. In fact, I can also use the quick selection tool (W) here to select a constituency. This is a relatively simple mask when making a track, and our next effect will do it. Drag or copy the imprint layer to the original copy file created in the first step, and add a white mask.
Cleaning masks is completely technical. The simplest thing here is to use the gradient tool to deal with it. Generally, ships come out, but the mast and the bow still overlap. If you are not satisfied with this effect, you can handle it manually with a brush. This paper mainly demonstrates how to stack and not continue to deal with the edge traces of the mask.
The general effects are as follows:
Step 6: Show the effect of circular star orbit.
Back to the previously saved snapshot, it should be where the 128 layer was copied. On the top floor, use the quick selection tool (W) to make a general selection of starry sky, without special exquisiteness, and leave corresponding space in the starry sky and foreground.
In the selection menu of PS, save this selection: standby.
Calculation of rotation angle:
The normal orbit is 1 hour, and the rotation is about 15 degrees. I am a star exposed for 30 seconds, so the layer of 128 is 30 seconds /3600× 15 degrees = 16 degrees, then the layer of 16 degrees/128.
The plug-in of Peninsula Snowman cannot set three decimal places, so I choose 0. 13. I don't know if it's reasonable for me to do so. I just want to better simulate the real star orbit. So now128th floor *0. 13 degrees = 16.64 degrees.
Click the Maximum button to stack.
The effect is as follows. Did you find the maximum value superimposed on the selection area, and the boat below came out directly, with almost no mask?
Of course, we can still use Ctrl+SHITF+E to merge layers and superimpose them with the original material. If you want to better the effect of this circular traditional star orbit, you need to copy more layers. I have done 5 12 floors at most, and the effect is much better.
The seventh step is the spiral orbit effect.
It is not difficult to call the just saved selection in the selection menu, or to make a selection with the quick selection tool (W). I want a more exaggerated effect, so I use the following parameters.
As before, I got the effect of the picture below. I need to continue to study the problem of constituencies.
Simply wiping the mask can get the final effect.