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Don’t know how to make use of Twitter for Photos? Although Twitter has no direct support for any type of media sharing, you could still share photos and other types of media through your tweets by making use third-party sites!

The sites that provide image sharing services for Twitter have varying features and may give several different method for sharing images. For example, Twitpic makes you able to share images on Twitter through email or SMS while Twitgoo does not provide such a way.

Now, you are probably wondering what these twitter image sharing services to make you able to use Twitter for Photos. Below I will list some of the third-party services and a short description on each to help you decide which ones would best suit your needs. Your account in twitter is what you will most likely use to log in to most, if not all these image sharing services which make them very much convenient to use. There is no need to you for register again!

- Twitpic - first to be mentioned is this largely popular website for photo sharing on Twitter, which gained immense popularity for displaying the first photos for Hudson river incident. You can use your phone, Twitpic’s site, or though Twitpic’s API you could use for your own application. If you do not understand what an API is, then do not worry about it because that would mean you have no use of it.

- Twicli - this is not just a photo sharing service, but a media sharing service that has support for high-quality video and audio attachments! Also, it has a tagging feature which is much like Facebook’s that makes you able to tag your friends on the images or vides you upload. It also makes you view photos in all sizes available and has great audio and video quality. It is great third-party service for Twitter which I find to be my favorite so far! One more thing, they welcome user input and suggestions over what features users would want added to Twicli and they actually take the time to see what majority of users want and act on it- a simple yet effective way to keep users loyal and know what to add and improve on their service.

- Pikchur - is an image sharing service. It allows you to upload photos from your mobile phone/device. What makes this stand out from other photo sharing services, is that it enables you to share photos to multiple social networking sites with just one upload! Highly ideal for you people who have accounts on many different social networking sites. Pikchur enables you to post photos at twitter, Facebook, flicker, brightkite, jaiku, tumblr, friendfeed, Plurk, identi.ca and koornk.

- Yfrog - this service allows you to share videos and photos with a very simplistic, user-friendly interface. This is ideal for those who just want the bare essentials for photo or video sharing and immediately get to start doing these things pronto!

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Your average Photoshop document consists of three colour channels: Red, Green and Blue. However, in addition to the colour channels, Photoshop also uses channels to store information which can be used in the process of selecting and masking different pixels within an image. To distinguish them from colour channels, these channels are normally referred to as alpha channels. Alpha channels are a huge topic in Photoshop but, in this article, we will focus on two techniques which cause alpha channels to be created automatically: the Save Selection command and QuickMask mode.



If you want to work with a given portion of an image, you need to make a selection. Photoshop has a number of tools and techniques for making selections and the time taken will depend on the complexity of the subject. Certain photographic elements, such as hair, are notoriously difficult to select and may take hours. So, having made a selection, it is not unreasonable for the user to want to save the selection for later reuse. The Save Selection command, which is found in the Select menu, is one of the 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.



If you view alpha channels in isolation, they are simply greyscale images. However, it is also useful to look at alpha channels at the same time as the image to which they will be applied. This means that Photoshop needs a way of representing the alpha channel which will not obscure the image. By default, the alpha channel information 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 trick of representing selection and masking as an overlayed colour is exactly the same as the one used in Photoshop’s QuickMask mode. To enter QuickMask mode, click on the QuickMask icon on the toolbar or just press "q" on the keyboard. Whenever you are in QuickMask mode, any of Photoshop’s paint tools, such as the paintbrush and gradient, can be used to make selections. Selections are shown 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 creates a temporary alpha channel called "QuickMask" which will disappear when you exit QuickMask mode.

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