Tag Archives: Windows

Adding Special Touches to Your Astro Landscape

1000 ISO, f/2, 3 minute exposure with some augmented stars

Because stars are pinpoints of light, the camera does not capture them as our eyes see them. To our eyes, brighter stars stand out more noticeably than dimmer ones. At a workshop in Alabama Hills, one of the participants, Julian Köpke, was using a diffusion filter so the stars captured would look more like you see with the naked eye. Sometimes nature provides its own diffusion filter in the form of high, thin cirrus clouds as shown below. The large bright orb is the star Sirius in the constellation Canus Major (Big Dog). The orange star near the top of the frame is Betelgeuse in the constellation Orion. One nice thing about the blur that the clouds added is the star color is more noticeable. But the diffusion here is not uniform because the belt stars (Alnitak, Alnilam and Mintaka) and “corner” stars (Bellatrix, Rigel, Saiph) in Orion are all noticeably brighter than the surrounding stars while in this photo only Betelgeuse and Rigel stand out.

Dog Star [C_065586]

You can create a make-shift diffusion filter by shooting through a nylon stocking – or buy a diffusion filter. The disadvantages of using a filter are that everything is blurred – including the foreground and you reduce the amount of light collected. Most night sky photographers try to avoid clouds and you will get an image like this:

The moon and Teapot Asterism in Sagittarius – over Lone Pine Peak – as shot.

When what you had in mind is something like this:

Same Photo as above, but with the Teapot Asterism in Sagittarius enhanced.

How to Bring Out Star Color And Enhance The Apparent Star Size

Our Advanced Stacker Plus has two built-in ways to increase star brightness. We call those Bump Up and Pump Up the stars. Bump Up creates a small blur by literally duplicating the shot , nudging the duplicate(s) and recombining .  Pump Up is more sophisticated and tries to find the stars so it can then apply enhancements to just the stars. But there is a new tool in the arsenal that I have begun using: Star Spikes Pro from ProDigital Software.  Version 4 is the latest as of this writing.

NOTE: Star Spikes Pro and HLVG described later are currently only available on Windows machines.

You can use the Star Spikes Pro plugin to add diffraction spikes and diffusion. The most common diffraction spikes you see with stars are due to obstructions in the telescope used to photograph them and many people come to think of the spikes as evidence of astrophotography.  You can create diffraction spikes easily on your own.- just stop down your aperture;  however stopping down to make stars create those spikes will not work well.

The first time I tried to use Star Spikes Pro it did not quite work as I expected.

Look hard. Star Spikes Pro decided the moon was a huge star outclassing all others.

Indeed it took me a bit to realize what was going on. The good news is it was easy to work around. The huge moon looks like a huge star to Star Spikes Pro – and that makes perfect sense since the plugin is usually used with Astrophotography that does not involve landscapes.

Here is how I made it work as I wanted and limited the effect to just the desired stars.

Layer Palette and Steps to Enhance The Teapot Asterism

Above left is the layer palette. Look carefully and you may spot the fix. After loading the image (1) I first duplicated the original and called the new layer Heal (2). I then did minor contrast adjustments, used the healing brush to remove hot pixels and other offenses (short satellite trail). Next I duplicated the Heal to another layer (3) and fed it into Hasta La Vista Green – a free plugin written by Rogelio Bernal Andreo of DeepSkyColors. HLVG removes green which is an unnatural sky color usually caused by RGB artifacts. HLVG operates on the entire layer and does not know the difference between land and sky. To leave the natural green in my landscape I used the quick selection tool, dragged it across the sky followed by Select -> Modify -> Expand 4 pixels. Then I created a Layer Mask using “Reveal Selection” (4). That made the foreground come back to its normal state. If you look carefully you will notice I also used a white brush to add some of that green removal back onto the mountain by painting on the HLVG layer mask (4).

The next operation was a finger twisting sequence that has no menu equivalent: Ctrl-Alt-Shift-E (on Mac that’s Command-Option-Shift-E). What that sequence does is “flatten” all the visible layers and create a NEW layer in the process (5). That layer I called Input to SSP.  Since I had discovered that Star Spikes Pro was confused by the moon (and could be confused by the foreground), I used the quick selection tool again and brushed it across the foreground. By default using the quick select tool again ADDs to the current selection so I brushed it around inside the moon and its halo. At this point I did not need to create another layer (Ctrl-J/Command-J or Duplicate Layer) but I did so that it was easy to see what happens next. After creating the new layer I selected it and used the delete key. Delete removes the selection making it transparent – that is the foreground and moon were now gone (6).

Next up: let Star Spikes Pro loose on the image. First deselect (Ctrl-D Command-D) or Select -> Deselect), and feed the sky layer to Star Spikes Pro via Filter -> ProDigital Software -> Star Spikes Pro.  The defaults for SSP produced the image below (I’ve zoomed in on the teapot asterism)

I felt the color was a bit too strong, and I did not want the diffraction spikes. The next step was to select “Advanced” – just below Settings, set the Primary quantity to zero. Next was the Secondary tab where I reduced the quantity to 44, the intensity I bumped up to 23. Soft flare I set quantity to 12, bumped up the intensity, dialed down the size a little and dialed down the Hue to -21. These adjustments were all based on eyeballing the image and were made for aesthetic appeal.  After all the adjustments looked about right, I saved the settings as a new adjustment I called “DiffusionOnly”. Finally I clicked OK and my layer was all nicely done by the SSP filter.

The filter processed a few more stars than I intended to augment. The simple solution was to create a “Reveal All Layer Mask”, select a brush, the color black and paint out all the effects I did not want on the layer mask (7).

The final operation was to use an Adjustment Layer (8) to increase the contrast and restrict that adjustment to the sky (where you see white) and tone the adjustment down a little with a low-flow back brush on one area that looked a little too dark.

The topmost layer in the layer palette is my watermark.

There Is An Easier Way!

With some experimentation, and some coaching from the plugin author I discovered that Star Spikes Pro has several features that make the process easier than I imagined. Instead of creating the transparency (deleting the moon and landscape) I only needed to select the area I wanted Star Spikes Pro to operate on.

Also, instead of masking off the stars I did not want affected after the fact, Star Spikes Pro has two tools to greatly simplify things the: “Hide” tool to turn off any effect that I did not want, and the “Show” tool to turn the effect on.

 

Star Spikes Pro limited to specific section of the sky via a selection and using the Hide tool to turn off an effect.

 

The net is that you can get that nice diffusion effect for your stars without having to compromise by shooting through a diffusion filter. However if you DO want to try a diffusion filter, I recommend you take two shots quickly. One with the filter off, one with the filter on. You can then place the diffused shot over the normal shot. Set the diffused shot to Lighten and mask in (or out) the areas where you want the diffusion to show through.

If you’re wondering whether there is a way to get the diffusion effect on a Mac or without purchasing Star Spikes Pro, there is, but it requires a lot of Photoshop twiddling and it is not anywhere near as pleasant as using ProDigital Software’s Star Spikes Pro.

Disclaimer and Book

I am not affiliated with ProDigital Sofware. I am a happy customer of Star Spikes Pro (and another product called Astronomy Tools). I was not paid, or encouraged to write about the product. I chose to because it is that good. Rogelio Bernal Andreo  author of Hasta La Vista Green and purveyor of DeepSkyColors is a friend and a multi-multi award-winning astrophotographer. He has a Kickstarter Project that I recommend you look into called Notes From the Stars

Notes from The Stars: 10 Award Winning Authors

Philosophy of Advanced Stacker PLUS

ASP14e-500

Coming soon…

Our 14e release is imminent. But after looking at our survey results and the most recently reported issues, we thought it wise to provide some hints to help you use the current software and to help you understand tradeoffs we made.

Our most commonly reported issue is something we struggled with. In an attempt to help users understand features we caused confusion. What are we talking about?  There are pop up windows: some of which should be Continued some of which should be Stopped. The only notification tool that works across all versions of Photoshop reliably doesn’t allow much customization, so when confronted with each of these dialogs, its understandable why some people click Stop when they should Continue and click Continue when they should Stop. The pop-up window below was the worst. We added highlighting to make it easy to see the difference, but we can’t use color or graphics on the actual pop-up without creating compatibility problems.  Do you notice the difference?

ASP14d_NotStop

This dialog indicates that the Watermark Alignment is not set… click CONTINUE

ASP14d_DoStop

If you stop on the first dialog, the layers needed to do stacking are not created and you will get errors the first of which is usually “Move is not currently available”

Move Not Available

Move Not Available

Once there is any kind of error it’s time to Stop and restart because manipulating layers in Photoshop is a little fragile.  The good news is the first pop-up can be turned off. The better news is that in 14e we have already turned it off for you. In fact in 14e we’ve trimmed down interaction as much as possible but still kept the awesome extra features.  Here is how to turn off the first pop-up (the one regarding Watermark Alignment) in version 14d and earlier.

Stop the Pop

Stop the Pop – disable the “Stop” step in Align My Watermark

Power of the Batch

The Advanced Stacker PLUS derives much of it’s power from two key things: Photoshop’s ability to batch process images AND Photoshop’s ability to open just about any image format on the planet.  Batch processing works because it is possible to use File -> Automate -> Batch to hurl a handful or a folder full of images at customized scripts and actions.  While Adobe Photoshop Elements has a “batch processor” there is no way to do operations other than those that are built-in to the software and that’s why ASP doesn’t support Elements.

One of the weaknesses of using Photoshop’s captive power is that it requires exploiting the tool in ways that are “allowed”.  While we like Adobe Photoshop CC, there are still many people who are very happy with older, non-cloud versions of Photoshop like CS3 or CS4.  We chose to not abandon that 35% of our customers so we support ALL CS versions of Photoshop on both Mac and PC. and that means we limit our actions and scripts to features that are common across all those versions and platforms. Readers may not be aware, for example, that while Adobe has published tools for customizing the interface, those tools have generally only supported the “latest” version of software. Indeed one of the most used tools (Configurator) has been abandoned and is no longer supported.

Another tradeoff has been in how we document our features. For example the File -> Automate -> Batch method of stacking a folder full of files is workable, if inelegant. But we use the Photoshop Bridge method of feeding the stacker and like it much more for several significant reasons.  One huge advantage of using Bridge is that you can actually see the content of the files. Another obvious advantage is that you are not constrained by what’s in your folder. If you have 29 shots from one sequence and 120 of another sequence you don’t have to split those shots between folders. And, in fact, with Bridge to select files you don’t have to use the same stacking method for all the files of one set, or have files from only one folder!

A word about 14E

As noted above, version 14E is imminent. Surprisingly the biggest obstacle has not been the additional features, the primary obstacle has been packaging and delivering the content. Windows 8.1 and Mac OSX 10.9 have gotten very protective of their machines and throw up many roadblocks to try to keep your machine safe from viruses and trojans. This means we had to invest $1500 dollars to become an LLC, get signed up for the Mac developer plan, get a Mac code signing certificate and get a code signing certificate for Windows, too! That doesn’t include acquiring a Mac or polishing the scripts and installers on each machine. Here is what the problem looks like on a Windows PC using Internet Explorer without signed code (it’s just as bad with Safari on Mac).

ASP_IE_RunAnyway

In fact, on both machines even though the code is signed (proving its provenance), you are still likely to get a warning like “This is not a commonly downloaded file”. It might be easier if we could email it to you, right? Except that Google, Yahoo and many others will not deliver an email that includes any executable content.

Both PCs and Macs have reached this point described in a Mac advertisement from 2009 that pokes fun at Vista’s intrusive safety system. Guess what… both machines are becoming like this because there are so many, uh, jerks out there eager to harm you electronically.

Our holy grail has been to create a single deliverable package that works both on a PC and on your Mac that we can document clearly, simply and as completely as possible.  That was probably too high a goal.

What’s coming in 14e?

  • Installation now is as simple as clicking.
  • EXIF data for the first image is preserved
  • New stacking mode of Ultra Streaks
  • Streamlined pop-ups to the minimum
  • Fully supports paths on both PC and Mac
  • Installation works for ALL versions of Photoshop CS you have installed on your machine
  • A price increase. But current owners will get the upgrade for free.
  • Some features we’re keeping under wraps for now.