Introduction of Photoshop

Introduction of Photoshop

Introduction of Photoshop is a raster graphics editor developed and published by Adobe Inc. for macOS and Windows. It was originally created in 1988 by Thomas and John Knoll.

Since then, it has become the de facto industry standard in raster graphics editing, to the point that it has also become a generic trademark leading to its use as a verb such as “to photoshop an image”, “photoshopping”, and “photoshop contest”, although Adobe discourages such use. Introduction of Photoshop

Introduction of Photoshop

Photoshop can edit and compose raster images in multiple layers and supports masks, alpha compositing, and several color models including RGB, CMYK, CIELAB, spot color, and duotone. Photoshop uses its own PSD and PSB file formats to support these features.

In addition to raster graphics, Photoshop has limited abilities to edit or render text, vector graphics (especially through clipping path), 3D graphics, and video. Its feature set can be expanded by Photoshop plug-ins, programs developed and distributed independently of Photoshop that can run inside it and offer new or enhanced features.

Photoshop’s naming scheme was initially based on version numbers. However, in October 2002, following the introduction of Creative Suite branding, each new version of Photoshop was designated with “CS” plus a number; e.g., the eighth major version of Photoshop was Photoshop CS and the ninth major version was Photoshop CS2.

Photoshop CS3 through CS6 were also distributed in two different editions: Standard and Extended. In June 2013, with the introduction of Creative Cloud branding, Photoshop’s licensing scheme was changed to that of software as a service rental model and the “CS” suffixes were replaced with “CC”.

Introduction of Photoshop

Historically, Photoshop was bundled with additional software such as Adobe ImageReady, Adobe Fireworks, Adobe Bridge, Adobe Device Central and Adobe Camera RAW.

Alongside Photoshop, Adobe also develops and publishes Photoshop Elements, Photoshop Lightroom, Photoshop Express, Photoshop Fix, Photoshop Sketch and Photoshop Mix.

Adobe also plans to launch a full-version of Photoshop for the iPad in 2019. Collectively, they are branded as “The Adobe Photoshop Family”.

Introduction of Photoshop File format

Photoshop document

Filename extension .psd
Internet media type image/vnd.adobe.photoshop
Type code 8BPS
Open format? no

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, 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 two 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.[11]

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’s other apps like Adobe Illustrator, Adobe Premiere Pro, and After Effects.

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