Getting Started With Alpha Channels And QuickMask Mode In Adobe Photoshop CS4

There are three colour channels in typical Photoshop file: Red, Green and Blue. However, in addition to the colour channels, Photoshop can also use channels to store information used in the process of selecting and masking different parts of an image. To distinguish them from the colour channels, these channels are normally referred to as alpha channels. Alpha channels are a huge topic in Photoshop since they can be used in all sorts of very creative ways. However, in this article, we will focus on just two techniques both of which cause alpha channels to be created automatically: the Save Selection command and QuickMask mode.

In order to manipulate any part of an image, you need to make a selection. Photoshop has a number of different tools and techniques for making selections and the time taken will depend on the complexity of the subject. Certain photographic elements, such as people's hair, are notoriously difficult to select and may take hours. So, having made a selection, it is not unreasonable that the user should want to save the selection for later reuse. The Save Selection command, which is found in the Select menu, is one of the easiest ways of doing this.

When you save a selection Photoshop creates an alpha channel and prompts you to give it a name. You can view the alpha channel by going to the Channel window and clicking on its name. Alpha channels are simple greyscale images which use a visual code to represent selections: the black areas on the channel represent areas which will not be highlighted when the channel is loaded as a selection and white areas represent those areas which will be highlighted. In actual fact, the reverse can be true since the user can set his or her preferences by double-clicking the channel thumbnail in the Channel window. The different levels of grey within an image represent different levels of selection. This makes alpha channels ideal for saving selections with feathering and fades.

When looking at an alpha channel in isolation, it appears black and white. However, it is also useful to look at an alpha channel at the same time as the image to which it will be applied. This means that Photoshop has to find a way of representing the alpha channel which will not obscure the image. By default, the alpha channel changes to a red overlay with an opacity of 50%: the user can change both the colour and opacity of the overlay by double-clicking the thumbnail of the alpha channel in the Channels window.

This same technique of representing selection and masking as an overlayed colour is also used in Photoshop's QuickMask mode. To enter QuickMask mode, click on the QuickMask icon on the toolbar or simple press the letter "q" on the keyboard. When in QuickMask mode, all of Photoshop's paint tools, such as the paintbrush and gradient, can be used to make selections. Selections are represented in exactly the same way as they are on alpha channels. Furthermore, if you look at the Channels window when in QuickMask mode, you will notice that Photoshop has created a temporary alpha channel called "QuickMask" which will disappear as soon as you exit QuickMask mode.

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The Difference of Adware, Spyware and Anti virus

Adware, spyware and computer virus share some similarities, one of which is that all three are major nuisances for computer users. Let's differentiate the three.

At first she thought it was just a glitch in the internet system and then she rationalized that no it maybe a glitch in the search engine she is using but the persistent occurrence of such a thing made her think that someone bugged her. We all hate bugging people us but people we can fend of.

What this law student is confronted with is a computer bug that she cannot fend off. In the first place she is not a technology savy person and in the second place she never uses her laptop for any other things than academic research and actual writing of her papers.

The situation above is not an isolated case. There are many people who find themselves caught up in technology problems that are mind boggling but actually can be answered with two words and those two words are spyware and adware. The infamous term of spyware was first coined in the year 1995 but it was popularized in the year 2000. Spyware is a computer software innocently infiltrated in a personal computer to be able to access personal information of the user.

This is done by studying logging keystrokes, web browsing history and even scanning a user's hard drive. Sounds like something we see only in James Bond movies but apparently we are wrong for anyone can be a victim of spyware.

It is safe to use the word victim because no one wants to be monitored of all their online activities. Spyware can understandably be used to spy on criminals because such use is beneficial to society but how about the use of spyware to intercept credit card details and the like. There is simply no excuse for the lax of the use of spyware.

Meanwhile, viruses are destructive form of software. They were purely designed and created for one purpose alone: to wreck havoc to your computer. They destroy whatever they come in contact to and will initiate self replication and infect as many components of the computer's operating system or network as possible.

Spyware, adware, malware are not like virus or worms that self replicate but they can be just as hassle as their counterparts for whoever wants to be disrupted of their normal personal computer activities.

One of the more popular hassles cause by these infectious software programs is the slowness of the computer which can really be annoying because when you are at work you tend to want to finish things quick not just because you are required but also because you want more done or you want to be able to go home early.

These adware maybe spyware in disguised and are just waiting to be deployed for them to gather your information. Learn to setup firewall systems and always block pop up blockers to minimize computer infection and ensure the security of all your computer files.

Scan your computer daily for bugs using (http://cbtopsites.com/search/acts2v38/spyware) Registry Cleaner repair software will clean scan your Windows registry and (http://cbtopsites.com/search/acts2v38/spyware) eliminate all spyware.

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Registry Cleaners And Error Fix

Try to google registry cleaners and youll find thousands of hits. There are just that many registry cleaners available out there. Registry cleaners are important for maintaining your computers performance. But with so many of them, which one do you choose to do the job for you? This is why I tried out one software to test if it works.

The name of the registry cleaner that I decided to test Error Fix. It has been in the market for a long time now, but I wanted to find out if it was as good as the other reviews said it would be. Sure, it claimed that it can fix every kind of problem there is but I wanted to find out for sure.

The Error Fix software has a couple of added features aside from the basic registry cleaning tasks. There are actually plenty of things that a person can do with the Error Fix software. The installation of the program was a breeze. I didn't encounter a lot of problems with that so I guess you can take that as a good sign.

When I started running the Error Fix program, I was quite pleased to see that it does detect a considerable good number of errors in my system. After that it proceeded to fixing all the errors that it found.

One feature that I was really pleased with was how the Error Fix can create back ups of my system settings.

You can even choose to just create a back up of your registry if you find it too cumbersome to create a back up of the entire Windows system. Back ups are very important for when we need to revert to our old settings due to file corruptions.

But for those who gauge the efficiency of the program by the interface (of how it looks like), youll be happy with the put together, professional look of the Error Fix. The down side with sophistication is that it can be complicated for the user.

All the choices are all presented in a way that users will not have a hard time finding which buttons they need for what actions. I give the software a thumbs up. (http://errorfix2.com/)

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1200 Watt Power Supply by Topower

The new PSU, branded Tiger is claimed to be suited for multi-GPU setups and has an efficiency of over 80%. The Tiger features nVidia's SLI certification and the so-called Plug-N-Twist (PNT) modular cabling system. A temperature-controlled 120 mm fan keeps the supply cooled down.

Topower's Tiger 1200 Watt uses six +12V lines, each of 20A. By means of a button on the power supply, the six individual lines can be formed into a single +12V line. The Tiger will sport a pricetag of about $200. (hardware.info)

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HP Has Launched a New 27" Widescreen Monitor

The 2709 series, as it is been called has a 16:9 aspect-ratio and is compatible with Full HD content. The screen features a native resolution of 1920 x 1080 pixels at a 60 Hz refresh rate. The contrast ratio is 1000:1, where the dynamic contrast is specified at 30.000:1. The gray-to-gray response time is 3 ms.

The monitor has DVI, HDMI and D-Sub inputs, can be tilted and features two 2 Watt speakers. Online, the HP 2709m costs about $500 USD. (hardware.info)

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OCZ Introduced The Z-Series of Power Supplies

About four months ago, OCZ launches Z-series with 80 Plus Gold, which are to set theirselves apart due to a high efficiency. Recently the manufacturer reported that the series, of which the two top models feature 80 Plus Gold certificates, are ready to hit the shelves, after nearly two years of development.

The 80 Plus Gold certification of the Z1000 and Z850 means that these power supplies have an efficiency of over 90% under a typical (half) load. According to the 80 Plus test report, the Z1000 has an 88,23% efficiency at 1/5th load, 90,93 at half load and 89,20% at full load. The Z850 features efficiencies of respectively 88,04%, 90,63% and 89,06%. The continuous power of these supplies is 1000 and 850 Watt, with peak wattages of 1100 and 940 Watt.

The Gold-certified power supplies are designed using the ATX standard and feature a single +12V rail that is capable of putting out a current of 83 A (Z1000) or 71 A (Z850). The PSU is cooled down by a 135mm ball-bearing fan. Both supplies are nVidia SLI-certified and will also be available in a modular version.

OCZ will release two more models in the Z-series, the Z550 and Z650. These supplies sports the 80 Plus Silver certificate and have three +12V rails. The Z550 and Z650 are also nVidia SLI-certified. No modular versions are planned for these models.

The power supplies come with a five-year warranty plan. At the moment of writing, American webshop newegg.com has the supplies listed at 300 USD for the Z1000M, 290 for the Z1000, 240 for the Z850M and 220 for the Z850. (hardware.info)

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Windows Spyware Removal Tools

Spyware is something most have had to deal with when using the internet. It is a common occurrence for spyware to be found on almost anyones computer. Even if you have a reliable antivirus program installed on your computer you are still likely to become infected. There are so many websites that require you to accept cookies That even if you do not download anything from the internet you are still likely to become infected.

The smartest and safest way to remove spyware from your computer is to use a program that is made for spyware removal. There are numerous spyware removal programs available online that will relieve your system of the irritating programs. You should make sure you are using spyware software that is designed for your operating system. If you are using Mac make sure it is made for MAC.

After you completely downloaded the spyware removal program you will be given a chance to scan your computer for infections. The program will produce a list of files that it feels that are threatening your computer. You can search through the list and choose to remove them all at one time or pick certain ones from the list. It is best that you remove the suspected threats one at a time to ensure that you do not remove something your system or a program you use could need to run correctly.

After you remove each item you should restart your PC to make sure there has been no mistakes made to the systems registry. Making a backup is recommended to correct any mistakes. The spyware programs will often locate files or programs that look and feel like spyware but are actually ones you need for your system to work.

It is never a good idea to try to remove registry entries on your own. You can create errors for the registry beyond repair sometime with removing just one entry. Spyware program removal software will sometimes come with a registry cleaner. It is a good idea to use this type of program to know your system is entirely free of the threats. Spyware and other malware programs will often embed in Windows registry making it very tedious to remove them. Even though the programs or files can be spotted by the removal tools they will often be unable to remove registry entries. So when you restart your computer the threat returns.

Windows Vista is equipped with several tools that are created for removing any malware programs as well as cleaning the registry. You can try using these first but in many cases it is just easier to get a program designed for spyware removal. The spyware removal programs may or may not offer protection against future malware attacks. You want to make sure that if your program does not that you find one that does. There is no way to avoid the threat of spyware entering your computer but it is helpful to have a program that includes the removal as well as the protection of spyware programs or other threats.

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