Free redefines software for mac

Requirements:
System 7.0 or later.

Keiths Image Stacker is an image processing program that is oriented primarily toward astrophotography. See my astrophotography webpage for information about my personal venture into that hobby.
What Keiths Image Stacker provides, more than anything else, is a workspace in which to align many similar images (say from a quicktime movie of Jupiter taken through a telescope with a webcam) and then to produce a stack of the images, which consists of a single image that comprises either the sum, or the average, or some value in between of the individually stacked images.
Stacking images is a well-established method for increasing the signal-to-noise ratio in a series of similar images. True "information" will shine through the stack, while random noise will drop out.
Enhancements:
- In the Unsharp Mask and Laplacian Sharpening Interfaces, if you attempted to redefine a the preview bounds but released the mouse button without dragging a rectangle, this could cause subsequent crashes later on. Should be fixed.
- v4.1 introduced a bug into the Open FITS file interface, in which each channel opened would erase any existing channels in the stack. This made it impossible to recover an RGB stack from three FITS files. The problem has been solved.
- The sliders in the Power Spectrum Sorting Interface were being memory leaked. Fixed.
- Fixed a bug that could cause a crash when the Clips Window is closed.
- Centroid alignment wasnt using the proper algorithm to determine a pixels overall value (using average instead of max of RGB components). Fixed.
- Preview bounds for a variety of operations were not properly displayed in the FrameStack window if the FrameStack window size did not perfectly match that actual FrameStacks size. Should be fixed.
- The Laplacian Sharpening Interface did not respect the pin-zero and pin-one boxes when creating the final result after hitting the OK button. This would cause the final result to suddenly change so as to not match the preview that was available immediately before hitting OK. This is fixed now.
- The Laplacian Sharpening Interface did not remember the value of the DC term properly after being closed. Fixed.
- Half bug, half missing feature in some cases, the Marking Clip Rect (cyan border around a clip) often was not drawn for many operations. Several occurances of this bug were fixed in v4.1. Several more are fixed here.
- Turns out I was calculating 2D power spectrums quite incorrectly. Sorting by power spectrum will hopefully improve now.
- A smattering of small changes and fixes to the precise dimensions of power-2 operations bounds rects and methods for getting pixels from GWorlds (inclusion of the right and bottom edges of pixels of a bounds rect primarily)
- In the Unsharp Masking Interface, if you moved the preview rect, the old preview rect was not restored to the original image. Fixed.
- If the RGB channels of the Frame Stack were independently aligned, the single channel views in the Histograms/Levels Interface were not drawn properly. Fixed (and eliminated now that those checkboxes are gone)
- If the FrameStack was rebuilt, the RGB alignments on the FrameStack were not reinitialized to (0, 0). Bug? Stupid feature? Either way, they are initialized now.
Changes:
- Added Debayering on the individual clips, for use with cameras that have been "RAW" modded to receive the Bayer pattern directly from the cameras CCD.
- Decreased the Event reaction time slightly. This vastly cuts the amount of CPU resources being hogged by the program without noticably affecting the programs performance.
- When sorting frames by power spectrum distribution, there is now a high frequency cutoff slider in addition to the old low frequency cutoff slider. The score of a frame will be the ratio of the sum of power between the cutoffs to the sum of total power. Initial experiments suggest that this can definitely improve the final sorted order of the frames.
- A few sorting methods have been completely removed because people continue to be confused as to how to properly sort the frames in such a way as to get satisfying results. At the same time, the sorting menu has been garnished with some textual notes that should prod people in the right direction under most circumstances.
- Significant changes to centroid alignment. Centroid alignment is considerably faster than difference alignment, especially when the misalignments are large. However, it may not produce the optimal alignment (I am unsure about this. Perhaps it is optimal after all, in which it is definitely superior to the difference method). Therefore, it is suggested to use centroid alignment (4-key) first and then clean up with a difference alignment using the 3-key. The 1-key and 2-key difference alignments, despite fixing large misalignments better than the 3-key method, are slower than the centroid method, which is why centroid followed by 3-key is recommended as the best overall approach.
- Added Cross-Correlation alignment. It is used in the same fashion as the existing four methods of alignment, three for difference and one for centroid. Simply hold down the 5 key and click on a clip or a selection of clips to use it. You must, however, use a power-of-two Operations Bound rect. Otherwise the program simply beeps. While this method usually works pretty well, it sometimes gets confused and produces a completely ridiculous alignment. Additionally, it is noticeably slower than the other alignment methods. Frankly, I think the centroid method is best for macro-alignments and the key-3 difference method is best for micro-alignments.
- Added a new operation on the FrameStack called Fourier Transform Editor. This allows you to literally paint out those parts of the Fourier transform of the stack that correspond to periodic interference patterns, such as the "herring bone" pattern that pervades many long exposure modified webcams. Aligning with a brightness threshold (which deals with the same problem in some cases) is still crucial, since it provides an optimal and sharp alignment, but if the final stack is not deep enough, it can still exhibit these kinds of interference patterns. This tool will virtually eliminate them. I would guess that it should also help in mitigating Bayer pattern effects, although I have not experimented with this yet.
- The centroid alignment wasnt using the brightness threshold before. Only the difference alignment was. Now centroid alignment uses it too, as does the new cross correlation alignment (although it may introduce unnatural edges into the image which could mess up the cross correlation alignment).
- Added a new checkbox to the Open Movie Interface that lets you specify that frames should be aligned on the fly as they are brought into the workspace. Not only does this allow you to align at the time of opening the file (which doesnt really save any time if you think about it), but it allows you to specify a bounds rect in the Open Movie Interface that only needs to fit around the object in the first frame, not the full drifted area of the object in all frames. This will save memory of course. Likewise this prevents the object from drifting outside the specified rect and being clipped by accident if you didnt make the original rect big enough in the first frame.
- Added four menu commands to the View menu for viewing the RGB channels of the FrameStack individually. Note that the 1, 2, and 3 command key menu equivalents have been reassigned in accordance with this change. These menu commands work even when the various operations dialogs are open. Note, however, that the channel appearances interact with the preview rects in some strange ways. I am still working on designing the best possible interface and interaction for all the possible combinations of settings.
- Removed the recently added channel checkboxes in the Histogram/Levels Interface. They are no longer necessary now that the much easier to use menu command replacements are available.
- Documentation updates.
- Resampling of the clips used to occur on the original opened-from-disk form of the clip. It now occurs on the modified form and makes the modified form the original form after resampling is completed. This means any operations become permanant and should be turned off prior to resampling if you dont want this, including dark frame subtraction, flat field division, normalization, median filtering, and alignment. In particular, this applies to deBayering as well, but deBayering must be done before resampling, as it will not work properly after resampling.
- Increased the maximum slider value for the Mask Intensity sliders in the Unsharp Masking and Laplacian Sharpening Interfaces.

Application Enhancer (APE) is a system used in our and third-party products that helps them to enhance and redefine various applications behavior running on your system.
What exactly is Application Enhancer? It is a combination of a Framework (a collection of commonly used code that can be re-used across different Application Enhancer modules) and a system daemon (faceless background application).
Application Enhancer performs its task by loading plugins (Application Enhancer modules, or APEs for short) containing executable code into the running applications.
Once loaded, the APE module performs the needed modifications (such as redefining the minimize window action, or customizing the standard Apple menu) on the launched application memory space, never touching any files on disk, utilizing set of functions defined in the Application Enhancer framework.
To help the APE modules to be loaded into newly launched applications, the Application Enhancer daemon (aped) is used.
Can Application Enhancer or its modules crash your system? Due to the nature of the method, Application Enhancer or its modules potentially can crash individual applications if there is a bug in the module or in the application being modified (sometimes APE modules expose "hidden" bugs in the applications).
If you suspect Application Enhancer or its modules cause crashes, you can always temporarily disable the Application Enhancer system.
There are a number of technologies incorporated into our products that attempt to make sure your applications are safe: Haxie CrashGuard makes sure the application is not modified if it has recently crashed;
APE Check makes sure no damaged APE modules are loaded; moreover, all of our products are going through a tedious beta testing process to make sure it runs as expected.
However, even if an individual application crashes, this cannot bring down the whole system due to the fact it has the protected memory and the Application Enhancer operates in user memory space, which means it cannot affect the system itself or processes belonging to other users (in this regard, Kernel Extensions (kext) are much more dangerous as they operate on the lowest possible level and have access to all memory and processes; because of that, Kernel Extensions can cause "kernel panics", while Application Enhancer cannot, as they dont have access to the kernel memory space).
Does Application Enhancer slow down the system? Due to the fact that more code has to be loaded at the application launch time, Application Enhancer can increase the application launch time (usually in the range of 40-60 ms per Application Enhancer module loaded on a modern Mac).
Once loaded, most Application Enhancer modules stay latent and will not hog your processor. We are constantly working on improving the situation, so please make sure you always run the latest versions of our products.
The technology behind Application Enhancer system has been in research and development for more than 2 years now, and many of our products are using it.
Main features:
- Provides capabilities to use Application Enhancer modules.
- Completely free of charge.
Enhancements:
- .Fixed a bug with corrupt Application Enhancers directory causing Application Enhancers preference pane to fail to load.
- Did some optimizations for the Mac OS X 10.4.9 update.

Play the redefined classic! Pilot Macman in 300+ exciting stages using the built-in accelerometer in your iPhone/iPod Touch.

Main features:
- Modern graphics & full screen gameplay.
- 300+ stages & increasingly tougher A.I.
- Simple control with just motion sensor and touchscreen.
- Never drop a game - autosave on picking up calls or exiting.
- And most of all is affordable and friendly - FREE and suitable for all ages.

System requirements:
- iPhone

LXVII is a faithful simulation, but not exact emulator, of the HP-67. It has the same number memory registers and program steps as the original. The stack depth is the same (4 cells), the button and prefix key layout is also the same, (which unfortunately makes its on-screen footprint a bit larger than I wanted,) it displays the same key-codes per program step, it even has a slider switch for selecting between user and program mode.
The impetus for keeping that level of compatibility was to give the owner of an HP-67 the ability to immediately use the application without needing to worry about differences from what he or she is used to.
New features were created with the intent that they extend existing features in a matter that was compatible with existing behavior.
Main features:
- Unlike most other calculator programs, LXVII is document based. This means you can have multiple calculators, running multiple programs, active at the same time. LXVII takes advantage of Cocoa threads, so it also takes advantage of as many CPUs as are available on the system.
- The document based architecture allows users to redefine LXVIIs functionality so that each document is essentially a new calculator, tailored to the users specific task.
- A paper tape panel like that found on the hp-97 desktop calculator is provided for printing out memory registers, intermediate stack values and program listings.
- A pull-out drawer can display the current values of the stack, the last-X register, the program counter, all memory locations and all program steps in memory. All values except the program steps can be edited directly within the drawer interface.
- All buttons have an assigned single-keystroke key so that the user can get to all calculator functions without the need of the mouse. To help remember the keystrokes, all buttons and button labels have active tooltips specifying the buttons functions.
- The 5 programmable buttons on the first row (A-E) can be assigned labels and tooltip messages that are saved with the document.

Last.fm is a new concept on the market - its radio redefined.

Want to do more than just look at the music charts of cool people you find on Last.fm? Now you can listen to them!

Formerly just for subscribers, everyone can now use our new-and-improved user radio stations on profile pages. On your own page, youll find recommendation radio. (Yes, you still need to subscribe to listen to yourself due to pesky licensing rules. But your friends can listen to you.)

Embed Your Head
Better yet, you can take it with you. Click the Share this station links for our new radio pages, perfect for sending to friends or embedding into your own website.
Radio is central to Last.fm, and so weve stopped hiding it in a sidebar. Tune in and see what youve been missing…

Make a Mix
Playlists have arrived at Last.fm. Rank your favourite tracks of all time, or show off those free downloads you found, and then put it on your profile page.
Gold tracks will play full-length, on demand. Just use the add to playlist button on any track page or chart to build up your list.

Make a Quilt
Fresh from our flash widget oven, weve got shiny new image quilts for you. Pick your colour and size, youll get an animated quilt of your top artists or albums that you can embed in your Myspace with a single click, or copy the code to put on any website.
Youll never need a boring text list of your favourite bands again.

Interactive Charts
Looking for those gold tracks for your playlist? Look no further than our new interactive charts, complete with inline track previews and other button-y goodness. We even straightened up those image quilts for a streamlined new look.

Find your Friends
Youre probably way more popular on Last.fm than you realise. By popular demand, our new contacts importer looks up other users of the site based on your web address book. Friend-tastic.

...and lots more.
Weve made improvements aplenty, including better event and tag pages, sidebars, and more. We hope you enjoy this start to 2007, its going to be a fun year.