A PSD file is a layered image file used in Adobe Photoshop. PSD, which stands for Photoshop Document, is the default format that Photoshop uses for saving and editing the image. PSD is a proprietary file that allows the user to work with the images’ individual layers even after the file has been saved.
PSD is a widely accepted format as it supports all the available images types such as Bitmap, RGB, Indexed Color, CMYK, Lab, multichannel and grayscale. PSD can save images in the form of layers (like image,text, shape, etc.) i.e. the image may be opened with Adobe Photoshop anytime and each individual layer, or even a part of it and can be editted.
Once the image is edited and saved, Photoshop allows the user to flatten the layers and convert that flat image into a .JPG, .GIF, .TIFF or any other non-proprietary file format so that it can be shared. Once a PSD image has been flatten after conversion, it cannot be converted back again to its original state i.e. PSD file and the user can no longer work with the image's layers. Therefore so always save the PSD file and not overwrite it during conversion.
File Extension: .psd
Mime type: image/photoshop, image/x-photoshop, image/psd, application/photoshop, application/psd
The Photoshop file format PSD is divided into five parts, file Header (specifies the image size and color channels), Color Mode data image resources, Layer and Mask information and Image data. Among these, File header has the fixed length, whereas other four parts have variable lengths.
Benefits of PSD
PSD can even be adjusted and edited independently to achieve better effects. Special blending effects can also be achieved with the help of the transparency mask of Photoshop. Due to these features, PSD has now become a very useful format for further adjustment and manipulation of an image in desktop publishing. Even the designers those who work with other image file types like TIFF, PNG, GIFF etc., will first work on their images in Photoshop and then transfer them to their preferred file types.
Maximum size of a PSD file: 30,000x30, 000 pixels and can also be saved with 16 bits per color channel
Applications that open PSD files: Adobe Photoshop and Photoshop Elements on Windows; and Adobe Photoshop, Photoshop Elements, and Apple Preview on Mac OS.
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