"Photoshop" redirects here. For other uses, see Photoshop (disambiguation).
Adobe Photoshop is a graphics editing program developed and published by Adobe Systems.
Adobe's 2003 "Creative Suite" rebranding led to Adobe Photoshop 8's renaming to Adobe Photoshop CS.
Thus, Adobe Photoshop CS6 is the 13th major release of Adobe Photoshop. The CS rebranding also
resulted in Adobe offering numerous software packages containing multiple Adobe programs for a
reduced price. Adobe Photoshop is released in two editions:Adobe Photoshop, and Adobe Photoshop
Extended, with the Extended having extra 3D image creation, motion graphics editing, and advanced image
analysis features. Adobe Photoshop Extended is included in all of Adobe's Creative Suite offerings except
Design Standard, which includes the Adobe Photoshop edition.
Alongside Photoshop and Photoshop Extended, Adobe also publishes Photoshop Elements and Photoshop
Lightroom, collectively called "The Adobe Photoshop Family". In 2008, Adobe released Adobe Photoshop
Express, a free web-basedimage editing tool to edit photos directly on blogs and social networking sites; in 2011
a version was released for the Android operating system and the iOS operating system.
Adobe only supports Windows and Macintosh versions of Photoshop, but using Wine, Photoshop CS5 can run
reasonably well on Linux.
In 1987, Thomas Knoll, a PhD student at the University of Michigan began writing a program on his Macintosh
Plus to display grayscale images on a monochrome display. This program, called Display, caught the attention
of his brother John Knoll, an Industrial Light & Magic employee, who recommended that Thomas turn it into a
full-fledged image editing program. Thomas took a six-month break from his studies in 1988 to collaborate with his
brother on the program. Thomas renamed the program ImagePro, but the name was already taken.Later that year,
Thomas renamed his program Photoshop and worked out a short-term deal with scanner manufacturer Barneyscan
to distribute copies of the program with a slide scanner; a "total of about 200 copies of Photoshop were shipped"
this way.Early history
During this time, John traveled to Silicon Valley and gave a demonstration of the program to engineers at Apple and
Russell Brown, art director at Adobe. Both showings were successful, and Adobe decided to purchase the license to
distribute in September 1988. While John worked on plug-ins in California, Thomas remained in Ann Arbor writing code.
Photoshop 1.0 was released in 1990 for Macintosh exclusively.
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Adobe Photoshop CS6 Extended running on Windows 7 |
| Developer(s) | Adobe Systems |
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| Stable release | CS6 (13.0.1) / 30 August 2012; 42 days ago |
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| Operating system | At least Windows XP with Service Pack 3 or Mac OS X 10.5.8 |
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| Platform | IA-32 and x86-64 |
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| Available in | 27 languages |
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| Type | Raster graphics editor |
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| License | Proprietary |
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| Website | adobe.com/photoshop |
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File format
Photoshop files have default file extension as .PSD, which stands for "Photoshop Document." A PSD file stores an
image with support for most imaging options available in Photoshop. These include layers with masks, color spaces,
ICC profiles, CMYK Mode (used for commercial printing), transparency, text, alpha channels and spot colors, clipping paths, and duotone
settings. This is in contrast to many other file formats (e.g. .JPG or .GIF) that restrict content to provide streamlined, predictable functionality.
A PSD file has a maximum height and width of 30,000 pixels, and a length limit of 2 Gigabytes.
Photoshop files sometimes have the file extension .PSB, which stands for "Photoshop Big" (also known as "large
document format"). A PSB file extends the PSD file format, increasing the maximum height and width to
300,000 pixels and the length limit to around 4 Exabytes. The dimension limit was apparently chosen arbitrarily by
Adobe, not based on computer arithmetic constraints (it is not close to a power of two, as is 30,000) but for ease
of software testing. PSD and PSB formats are documented.
Because of Photoshop's popularity, PSD files are widely used and supported to some extent by most competing
software. The .PSD file format can be exported to and from Adobe Illustrator, Adobe Premiere Pro, and After Effects,
to make professional standard DVDs and provide non-linear editing and special effects services, such as backgrounds,
textures, and so on, for television, film, and the web. Photoshop's primary strength is as a pixel-based image editor,
unlike vector-based image editors. Photoshop also enables the creation, incorporation, and manipulation of vector
graphics through its Paths, Pen tools, Shape tools, Shape Layers, Type tools, Import command, and Smart object
functions. These tools and commands are convenient to combine pixel-based and vector-based images in one Photoshop
document, because it may not be necessary to use more than one program. To create very complex vector graphics
with numerous shapes and colors, it may be easier to use software that was created primarily for that purpose, such as
Adobe Illustrator,CorelDRAW or Xara Designer Pro. To import the complex vector object into Photoshop, it can be imported
as a Smart Object. Double-click on Photoshop's layers palette to open the object in its original software, such as Adobe
Illustrator. Changes can be made. When saving, Photoshop will update the Smart Object.
Language availabilities
Photoshop is available in the following languages:
Brazilian Portuguese, Chinese Simplified, Chinese Traditional, Czech, Danish, Dutch,
English, Finnish, French, German, Hungarian, Italian, Japanese, Korean, Norwegian,
Polish, Romanian, Russian, Spanish, Swedish, Turkish and Ukrainian.
The Arabic, Greek, and Hebrew versions are available from Winsoft.
Plugins
Main article: Photoshop plugin
Photoshop functionality can be extended by add-on programs called Photoshop plugins
(or plug-ins). Adobe creates some plugins, such as Adobe Camera Raw, but third-party
companies develop most plugins, according to Adobe's specifications. Some are free
and some are commercial software. Most plugins work with only Photoshop or
Photoshop-compatible hosts, but a few can also be run as standalone applications.
There are various types of plugins, such as filter, export, import, selection, and automation.
The most popular plugins are the filter plugins (also known as a 8bf plugins), available under
the Filter menu in Photoshop. Filter plugins can either modify the current image or create content.
Below are some popular types of plugins, and some well-known companies associated with them:
- Color correction plugins (Alien Skin Software, Nik Software, OnOne Software, Topaz Labs
Software, The Plugin Site, etc.)
- Special effects plugins (Alien Skin Software, Auto FX Software, AV Bros., Flaming Pear Software, etc.)
- 3D effects plugins (Andromeda Software, Strata, etc.)
Adobe Camera Raw (also known as ACR and Camera Raw) is a special plugin, supplied free by Adobe, used
primarily to read and process raw image files so that the resultant images can be processed by Photoshop.
You use Camera Raw by opening an image file, rather than using the 'Filter' menu. Like other plugins,
Camera Raw's help information is in the 'Help > About Plug-In' menu (as "Camera Raw"). You can use
Camera Raw also by Adobe Bridge, by clicking on any image and selecting 'File > Open in Adobe Camera
Raw'.
Tools
Upon loading Photoshop, a sidebar with a variety of tools with multiple image-editing functions appears to the left
of the screen. These tools typically fall under the categories ofcropping and slicing; drawing; painting;
measuring and navigation; selection; typing; and retouching. Some tools contain a small triangle in the
bottom right of the toolbox icon. These can be expanded to reveal similar tools. While newer versions of Photoshop
are updated to include new tools and features, several recurring tools that exist in most versions are discussed
below.
Cropping and Slicing
The crop tool can be used to select a particular area of an image and discard the portions outside of the chosen
section. This tool assists in creating a focus point on an image and excluding unnecessary or excess space.
The "slice" and slice select tools, like the crop tool, are used in isolating parts of images. The slice tool can be
used to divide an image into different sections, and these separate parts can be used as pieces of a web page
design once HTML and CSS are applied. The slice select tool allows sliced sections of an image to be adjusted
and shifted.
Drawing
Photoshop includes a few versions of the pen tool. The pen tool creates precise paths that can be manipulated
using anchor points. The freeform pen tool allows the user to draw paths freehand, and with the magnetic pen tool,
the drawn path attaches closely to outlines of objects in an image, which is useful for isolating them from a
background.
Measuring and Navigation
The eyedropper tool selects a color from an area of the image that is clicked, and samples it for future use.
The hand tool navigates an image by moving it in any direction, and the zoom tool enlarges the part of an image
that is clicked on, allowing for a closer view.
Selection
The marquee tool can make selections that are single row, single column, rectangular and elliptical. Once an
area of an image is highlighted, the move tool can be used to manually relocate the selected piece to anywhere
on the canvas. The lasso tool is similar to the marquee tool, however, the user can make a custom selection by
drawing it freehand. In addition, the lasso tool can make magnetic and polygonal selections.
Typing
Photoshop also provides tools for adding and editing text. The type tools create an area where text can be entered,
and the type mask tools create a selection area that has the shape of text. The type tool creates vector-based
text, so symbols, letters and numbers in various fonts and colors can be re-sized while maintaining the same
resolution.
Retouching
There are several tools that are used for retouching, manipulating and adjusting photos, such as the clone stamp,
eraser, burn, dodge, smudge and blur tools. The clone stamp tool samples a selected portion of an image, and
duplicates it over another area using a brush that can be adjusted in size, flow and opacity. The smudge tool, when
dragged across part of an image, stretches and smudges pixels as if they are real paint, and the blur tool softens
portions of an image by lowering the amount of detail within the adjusted area. The eraser tool removes pixels from
an image, and the magic eraser tool selects areas of solid color and erases them. The burn and dodge tools, which
are derived from traditional methods of adjusting the exposure on printed photos, have opposite effects; the burn
tool darkens selected areas, and the dodge tool lightens them.
Content-aware
Content-awareness is a useful aspect of Photoshop where image editing is done automatically and intelligently.
It comes in two forms, content-aware scaling, and content-aware filling, in which elements in a background
automatically recompose according to the areas a user of the program decides to fill or scale. More specifically,
content-aware scaling works by rescaling an image and causing its content to adapt to the new dimensions and
preserving important areas of it. Content-aware filling functions by matching tone, color, and noise of an area of the
image that contained an object or detail in which the user decides to remove.
Healing Tools
With improvement retouching tools like the Clone Stamp tool and Healing Brush tool, imperfections of an image
can easily be removed. These tools essentially function by locating a source point (or multiple source points) that
can be scaled or rotated in order to cover an imperfection or unwanted detail in a specific area of an image.
Puppet Warp
Similar to the content-aware tool, the puppet warp tool reveals Photoshop’s intelligence by allowing a user to
reposition an object in an image such as a flower or arm. This is done by using points that outline the structure of
an object and easily repositioning in the wanted orientation.
Video Editing
In Adobe CS5 Extended edition, video editing is comprehensive and efficient with a broad compatibility of video file
formats such as MOV, AVI, FLC, MPEG-4, and FLV formats and easy workflow. Using simple combination of
keys video layers can easily be modified, with other features such as adding text and the creation of animations
using single images.
3D
With the Extended version of Photoshop CS5, 2D elements of an artwork can easily become three-dimensional
with the click of a button. Extrusions of texts, an available library of materials for three-dimensional, and even
wrapping two-dimensional images around 3D geometry are all possible with this version of Photoshop. Realism
can also be added to an image using the 3D features of Photoshop such as animating image-based lights and
depth of field.
Mobile Integration
Third-party plugins have also been added to the most recent version of Photoshop where technologies such as the
iPad have integrated the software with different types of applications. Applications like the Adobe Eazel painting
app allows the user to easily create paintings with their fingertips and use an array of different paint from dry to wet
in order to create rich color blending.
Camera Raw
With the Camera Raw plug-in, RAW images can be processed without the use of Adobe Photoshop Lightroom,
along with other image file formats such as JPEGs, TIFFs, orPNGs. The plug-in allows users to remove noise
without the side-effect of over-sharpening, add grain, and even perform post-crop vignetting.
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