In my last post, just 4 days ago, I compared the most popular software programs that “stack” images together … the Helicon-Focus Stacker (@ $300) and the Zerene Stacker (@ $300) … to the new “scripts” stacker found in Adobe Photoshop CS5 Extended (@ $1,000). My conclusion was that Adobe Photoshop CS5 Extended proved to be, by far, the better, more consistent overall stacking program than these other programs.
As mentioned in the previous blog post, “stacking” photos is a phrase that is used to describe the combining of several different images (of the same subject) into one image of that subject. This can be a great asset in macrophotography, because it is almost impossible to get the entire subject “in focus” with just one shot using a macro lens, due to the very shallow depth-of-field inherent in macro lenses. To help work around this, innovative software has been created with the idea to allow the photographer to take multiple macro photos of the same subject … trying to get various portions of the subject “in-focus” … and then the photographer will combine all of these images together by “stacking” them into one image … and, essentially, it is the software’s job to do all of this “stacking and blending” into ONE image as clealy and seamlessly as possible.
In trying to decide whether I should get a “specialized” stacking program (and spend another $300 to do so), or if the software program I am using is just fine, I decided to download FREE SAMPLES of these other stacking programs and see how they worked in comparison to the one I already had. I also thought it would be helpful to others if I shared my results and rated these programs against each other. Well, in order to rate which software program is better than which, it is easy to see that whichever program “stacks” with the greatest accuracy, leaving the fewest “imperfections” for the photographer to edit-out afterwards, has to be considered “The Best” program … while whichever program “stacks” with the least accuracy, leaving the most “imperfections” for the photographer to have to work on and edit-out afterwards, can only be called “The Worst” program for this purpose. Pretty basic logic here
Well, after I made the post below this one, which covered the results I got after 1 difficult stack of a Tall Ironweed flower, my test results left the Helicon-Focus Stacker as “the worst” … the Adobe CS5 stacker as “the best” … and the Zerene Stacker was somewhere right smack in the middle. These results I shared left some people dismayed, some people in uproar, but most of the people were thoughtfully reflecting upon their own stacking software … and how much time they’re wasting in post-process editing and re-editing all the errors that their software program spits out for them. There was also question called upon the validity of just the “one” test sample I did, so I decided to run another, much more involved test, which brings us to this current post
In this test, I will be assessing 7 different ” flower stacks” … going from easiest to most difficult … to show the difference gradually (but unmistakably!) how the Adobe CS5 Extended program reliably and consistently beats the other 2 systems, right on down the line. The number of images to “stack” will go from 2 all the way up to 10, and the level & complexity of the images will go from basic shapes to extremely complex and overlapping lines and curves.
- As before, I will minimally process all the raw images in Lightroom 3;
- I will then export all of the images to be “stacked” into separate 16-bit .tiff photos, saved in the ProPhoto ColorSpace for maximum retained color potential (because this will create the deepest, most complicated files to handle, but which are critical for printing the best images in the real world, not just for “posting online”);
- All 3 programs will be stacking the exact same files;
- Once the “stack” is made, the files outputted from each program will be shrunk to 2000 x 1333 dimensions, converted to 8-bit .jpg form in the sRGB color space, with no further processing/sharpening/editing of any kind, other than to add my copyright logo and watermark;
- The colors/quality you see will be what the programs put out, and where you as the photographer would have to begin in order to provide any corrections to polish and finalize the image.
In order for this post to have any meaning for you at all, you must click on each of the 4 full-sized images, let them all download, and then carefully compare the focusing accuracy, the unwanted artifacts (blurred/duplicate “edges,” halos, etc.), the quality of the color rendition, and the smooth, rich nature of the bokeh … or the total destruction of the background bokeh. As mentioned, I will begin with the easiest, simplest images to render, gradually increasing the difficulty as we progress, ending finally with the toughest and most complex images to render–and then I will provide my own conclusions after each image. So, without any further ado, let us start with the simplest images (Note: the Zerene Stacker has 2 stacking modes, Dmap and Pmax, and I rendered stacks through Zerene using each of these 2 modes, comparing them against each other as well as against the other software products):

Pineland Hibiscus (2-image stack)
This is a mere 2-stack image of a very simple composition: easy lines, easy edges, somewhat easy background bokeh. The results? Virtually identical. All 3 programs had an easy time rendering this image, but you will notice that the Zerene Stacker (Dmap) already is showing some bokeh degrading in the upper right portion of the image, compared to the others, while the Zerene Stacker (Pmax) equalled the results of Adobe CS5:
* Adobe CS5 Stack (2000 x 1333)
* Helicon-Focus Stack (2000 x 1333)
* Zerene Stack-Dmap | Zerene Stack-Pmax (each @ 2000 x 1333)
Remember, there was no additional post-processing done in any of these images, so if the images look a little dark, that is because I have not yet begun to clean any of these images up or to “finalize” them in any way. What you are looking at is essentially the unpolished results as to how each of these Image Stackers “spit-out” the results of their stacking efforts of combining 16-bit .tiff files into one image, and then converting this composite image from ProPhoto to sRGB so you can see the results on your monitor. This will be true of all the forthcoming images as well. Winner: Adobe CS5 Extended Stacker & Zerene Stacker (Pmax), Runners-Up: Helicon-Focus Stacker & Zerene Stacker (Dmap), Loser: NONE (neither of the programs produced a “terrible” image, so nobody came out a loser here). Now on to the next image:

Saltmarsh Mallow (10-image stack)
Even though this was a 10-image stack, it is still a relatively clean and easy image to align (although it has a much more color-intensive background bokeh to deal with than the previous image). Yet still, the other two specialists fumbled the ball here, while once again the Adobe CS5 Extended Stacker did its job:
* Adobe CS5 Stack (2000 x 1333)
* Helicon-Focus Stack (2000 x 1333)
* Zerene Stack-Dmap | Zerene Stack-Pmax (each @ 2000 x 1333)
While the Helicon-Focus program did a good job along the flower edges … it smeared the center of the flower … and while the Zerene Stacker (Dmap) did a good job with the center of the flower, it totally destroyed the edges. And both the Helicon-Focus and the Zerene Stacker (Dmap) programs totally destroyed the bokeh of this image. In running the Pmax version of Zerene, this result produced a vastly superior result to the other Zerene effort, clarity and bokeh-wise, yet it changed the color of the image drastically (and to me unpleasantly). Yet the Zerene Stacker (Pmax) produced a more uniform overall sharpness than did even the Adobe CS5 stack. Meanwhile, once again, the Adobe CS5 Extended stacker did virtually everything right, except a few elements of blurring the flower center that would be easy to correct in PP. Winner: Adobe CS5 Extended Stacker and Zerene Stacker (Pmax), Runner-Up: NONE, Loser(s): Helicon Focus Stacker and Zerene Stacker (Dmap) both came out losers, because both programs produced images that would not be worth anyone’s time to take the trouble to correct. Now on to the next image:

Scarlet Milkweed (6-image stack)
This next image was at about the same level as the previous image, but perhaps made more difficult with an even creamier bokeh and more intense oranges and ruby-reds to try to render accurately. Worse, this milkweed also carried with it many more “edges” for the stacking programs to try to align properly with no mistakes. So here is how this test turned out:
* Adobe CS5 Stack (2000 x 1333)
* Helicon-Focus Stack (2000 x 1333)
* Zerene Stack-Dmap | Zerene Stack-Pmax (each @ 2000 x 1333)
Once again, the Adobe CS5 Extended stacker far exceeded the competition, but I did notice some ever-so-slight slight bokeh degradation in a few spots. The Helicon-Focus stacker performed fairly well on the left (flower) side of the image, but degraded towards the center and right side of the image, particularly in its inept handling of the fading stem of the milkweed. Meanwhile, the Zerene Stacker (Dmap) struggled getting any of the edges right, it produced halo artifacts throughout, and then totally degraded the bokeh on the right side of the image. However, the Pmax version of Zerene produced a vastly superior result than by its other method, but here again there was some banding and bokeh degradation on the far right, as well as an overall “color loss” to the whole image. Winner: Adobe CS5 Extended Stacker, Runner-Up: Zerene Stacker (Pmax), Loser(s): Helicon-Focus Stacker and Zerene Stacker (Dmap) both produced images with enough focusing defects, and with a garbled enough bokeh, that the “result” wouldn’t be worth the time in post-processing to try to salvage. Now on to the next image:

Pale Meadow Beauty (4-image stack)
Even though this was only a simple 4-image stack, with clean flower petals and stamens, the image of the Pale Meadow Beauty flower contained some very intense color shifts, as well as a rather cluttered background, which I thought would particularly challenge the software programs, and here are the results:
* Adobe CS5 Stack (2000 x 1333)
* Helicon-Focus Stack (2000 x 1333)
* Zerene Stack-Dmap | Zerene Stack-Pmax (each @ 2000 x 1333)
Once again, the Adobe CS5 Extended stacker produced an excellent result, but so too did both of the other competitors, and that was Helicon-Focus as well as the Zerene Stacker (Pmax). Meanwhile, the Zerene Stacker (Dmap) did an admirable job of rendering the actual flower itself … but stumbled a bit on rendering the background bokeh, though the results were still workable not terrible. Winner: Adobe CS5 Extended, Helicon-Focus Stacker & Zerene Stacker (Pmax), Runner-Up: Zerene Stacker (Dmap), Loser: NONE. All of these products produced either great or easily-workable results. Now on to the next image:

Joe-Pye Weed (10-image stack)
This time I stepped-up the pace a bit, by going with a 10-image stack, that contained both vivid and contrasty colors, multiple complicated edges to align, as well as a solid bokeh to render and try to keep smooth and creamy. Here are the results:
* Adobe CS5 Stack (2000 x 1333)
* Helicon-Focus Stack (2000 x 1333)
* Zerene Stack-Dmap | Zerene Stack-Pmax (each @ 2000 x 1333)
All of the programs struggled a bit with this one, and even the Adobe CS5 Extended stacker produced a few halos, a blurred pair of insect antennae, but overall Adobe once again prevailed. The Helicon-Focus Stacker produced a lot of halos, but they were clean and relatively easy to edit, and it also did a pretty fair job of rendering the bokeh. Meanwhile, the Zerene Stacker (Dmap and Pmax) left the worst overall results, spitting out a ton of halos and an utterly-destroyed bokeh (Dmap), and producing halos and ruining the color quality (Pmax). Winner: Adobe CS5 Extended Stacker, Runner-Up: Helicon-Focus Stacker, Loser: Zerene Stacker (Dmap & Pmax). Now on to the next image:

Ironweed (5-image stack)
This was the same test I posted in my last entry 4 days ago, which was a 5-image stack of a very complicated Ironweed Flower, for which I have already posted the results in yesterday’s blog, but I have again re-entered this result here today because I incorporated a second Zerene Stack test to this model (in Pmax mode), as well as because the level of difficulty of this challenge was so great. Here are those results:
* Adobe CS5 Stack (2000 x 1333)
* Helicon-Focus Stack (2000 x 1333)
* Zerene Stack-Dmap | Zerene Stack-Pmax (each @ 2000 x 1333)
As mentioned in the last report, the Adobe CS5 Extended stacker did everything better than the competition here, from edge accuracy to color rendition to its rendering a smooth and creamy bokeh very well. It wasn’t perfect, but it was much closer than the other two. Meanwhile, the Zerene Stacker (both Dmap and Pmax) produced very close results to the Adobe rendering, but still left more halos around the edges to have to edit-out, while the Helicon-Focus result was totally unsalvageable. Winner: Adobe CS5 Extended Stacker, Runner-Up: Zerene Stacker (both Dmap and Pmax results were virtually indistinguishable), Loser: Helicon-Focus Stacker. Each of the Zerene stacks, while not quite as refined when compared to the Adobe stack, were both nonetheless workable … but I would not have bothered to try to salvage the Helicon-Focus stack and would have thrown it in the Recycle Bin. Now on to the final image:

Another Ironweed Species (7-image stack)
This final photo was the most complex of all, with an entire field of nothing but flowers, colors, sticks, and shapes for these programs to try to render accurately. In this very tough case, all of the programs struggled and produced multiple flaws, but only the Adobe CS5 Stacker produced results that would have been worth bothering to clean-up:
* Adobe CS5 Stack (2000 x 1333)
* Helicon-Focus Stack (2000 x 1333)
* Zerene Stack-Dmap | Zerene Stack-Pmax (each @ 2000 x 1333)
This photo really isn’t a very good image, as there is too much clutter in the background to be considered an “artistic” macro shot, and yet it served its purpose by showing the potential defects in all of the stacking programs. Still, if a person wanted to salvage this image, the Adobe stacker produced the overall best result, with the Zerene Stacker (Pmax) doing enough things well that you could have been able to salvage this image also, if you cared to do enough post-processing. All programs blew several areas where they clearly got “confused” in regard to focus, but overall the CS5 stack retained the better edge accuracy and color rendition (although the Pmax rendering of Zerene was close in some areas, and actually surpassed the clarity of Adobe in others). Meanwhile, the other two programs [Helicon-Focus and Zerene (Dmap)] both completely crashed and burned in the bokeh department. Winner: Adobe CS5 Extended Stacker, Runner-Up: Zerene Stacker (Pmax), Loser: Helicon-Focus Stacker & Zerene Stacker (Dmap). Once again, the Adobe image could be salvaged by hand (albeit with considerable effort) … and so too could the Pmax version of the Zerene Stacker (with even more effort) … while the only option for the two images produced by Helicon-Focus and Zerene (Dmap) would be to flush them down the Recycle Bin.
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Overall Results:
* Adobe CS5 Extended Stacker: First Place (First Place 7x out of 7)
* Zerene Stacker (Pmax): Second Place (Tied for First Place 3x, Second Place 3x, Loser 1x)
* Helicon-Focus Stacker: Third Place (Tied for First Place 1x, Second Place 2x, Loser 4x)
* Zerene Stacker (Dmap): Last Place (First Place 0x, Second Place 3x, Loser 4x)
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Some Final Thoughts:
After running this these extensive and time-consuming tests on 7 multi-image stacks in a row, from easy to very difficult, I would have to say the Helicon Stacker lagged behind overall than the Zerene Stacker (Pmax), while the Zerene Stacker (Dmap) consistently produced the worst results of all. For those who don’t want to bother dealing with mediocrity, and who only want the best, the Adobe CS5 Extended Stacker reigned supreme in every single test that I ran, in the end my opinion remains absolutely unchanged that neither of these other products could consistently perform at the level of the Adobe CS5 Stacker (though Zerene Pmax did get close, and equal, the Adobe result a few times; it just wasn’t consistent enough to suit me).
Now then, I would like to mention that I have heard people state that the Adobe program “takes too long” to process multiple stacks, but I really didn’t notice a significant difference between any of the programs at all. Naturally how “long” any program is going to take depends on the computer system’s resources as much as anything else. On my end, I have a fairly decent (but by no means super) system which is as follows: AMD Phenom II 3.00 gHz processor, 8 gig RAM, Windows 7 (64-bit), and an ATI Radeon 5450 Graphics Card. Not too shabby, but nothing to write home about either. My computer is, however, within the realm of “modern-day performance specs,” and is not an outdated machine. Therefore, as far as any claims about the Adobe Photoshop CS5 stacker being “slow” is concerned, 3 things come to mind:
1. Those people do not have the system resources to process multiple images at once properly, so what they call “slow” is really their own system’s inadequacy to handle the job;
2. Because Adobe is actually retaining all of the color detail better, this is going to take a whole lot more time to process than a program that is “dropping” the color tones and detail. In fact, I would say that if anyone is processing 10-30 images, and his computer does not slow down a bit, then he either has one helluva fast system, or his images are not being processed properly and with ALL of the detail/colors being processed with true precision and accuracy;
3. I guess it all depends on what a person’s definition of “slow” is. The Zerene stacker took about 10-15 seconds to process my 5 detailed images … sometimes longer though! … and it would have taken me about 4 hours to cut every single artifact out of that image, to clean up the blurs, plus adjust the colors, etc., in many of the “results.” Meanwhile, the Adobe program took maybe 2 minutes to process, and I might have had 2-5 more minutes of processing to do in most of the images.
Of all the products, Helicon-Focus Stacker spit-out a “result” the fastest overall, but not by much. (I also think Helicon Focus had a far nicer interface to work with than the Zerene Stacker.) Meanwhile, the Zerene Stacker seemed to work fast on an image or two … but then it would “freeze” my computer after that, to where it needed to be re-started. In the end, neither product spit-out a “result” so much faster than the Adobe CS5 Extended stacker to justify their poor performance when compared to it. Remember this: “how long” a program takes to process an image doesn’t stop after you click on their respective ”process” buttons … it also encompasses the amount of time it takes “you” to correct all of the errors until you have an acceptable image. And the simple fact is, neither of these other “specialized” programs could process all of the details as precisely as the Adobe CS5 Stacker was able to do repeatedly and consistently in every instance, not just one or two. So, really, if these other programs repeatedly force a person to have to spend a couple of hours doctoring their “results” (even on medium-hard images) … where the Adobe CS5 stacker repeatedly gets it right every time … can anyone honestly say he is “saving time” with these other products? I sure don’t think so! Honestly, I would have thrown most of the results from these other programs in the Recycle Bin rather than even bother to try to correct their flaws.
And the final point of interest I would like to share is that, not only did the Adobe product produce a better result every time, but the Adobe stacker’s produced images (though of better quality) also were rendered as smaller files every time. Consistently producing smaller files will ultimately save you hard drive space every time you stack an image, rather than waste your hard drive space every time you stack an image. Therefore, to me, having to wait a couple of minutes longer for the Adobe program to process my stacks is a small price to pay for saving me a nightmare’s worth of “corrections” to have to do after it’s finished … and I would rather conserve my hard drive space by saving superior images in smaller sizes … than waste my hard drive space saving inferior images in bigger sizes. So, here again, all the time and resources that it takes to process your stacked images needs to be taken into account, not just how long it takes after you click the button, and the Adobe CS5 Stacker leads the way in every single category.
With all of these provisions in place, it has been my repeated and consistent findings that Adobe CS5 Extended once again proved to be the better software “stacking” program … and, really, by a country mile. Therefore, if the age-old adage “Time is Money” is correct, then the extra $$ that the Adobe CS5 Extended program may “cost you” in the beginning to get … will quickly pay for itself by saving you a nightmare’s-worth of post-processing time in the end.
Jack
PS: If anyone doubts my test results, please be my guest and download full copies of each of these programs and compare the results of processing your own macro files for yourself