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FITS Liberator is free software released under the BSD-3 license. [2] The engine behind the FITS Liberator is NASA's CFITSIO library . Although the first version of the software was a tool used mainly by professional astronomers , efforts have been made to bring the tool to the homes of educators and students.
Many non-Adobe commercial graphics applications also support Photoshop-compatible plugins – Paint Shop Pro, [4] PhotoImpact, and Corel PhotoPaint are some of the better-known ones. There are several dozen more plugin hosts, including lesser-known products like Chasys Draw IES, the free-software image editor GIMP, and viewers like IrfanView. [5]
Photopea is free advertising-supported software, and offers a premium ad-free subscription. It is compatible with all modern web browsers, including Opera, Edge, Chrome, and Firefox. [5] The app is compatible with raster and vector graphics, such as Photoshop's PSD as well as JPEG, PNG, DNG, GIF, SVG, PDF and other image file
Design Patterns: Elements of Reusable Object-Oriented Software (1994) is a software engineering book describing software design patterns. The book was written by Erich Gamma , Richard Helm , Ralph Johnson , and John Vlissides , with a foreword by Grady Booch .
A visitor pattern is a software design pattern that separates the algorithm from the object structure. Because of this separation, new operations can be added to existing object structures without modifying the structures. It is one way to follow the open/closed principle in object-oriented programming and software engineering.
The Indian-head test pattern is a test card that gained widespread adoption during the black-and-white television broadcasting era as an aid in the calibration of television equipment. It features a drawing of a Native American wearing a headdress surrounded by numerous graphic elements designed to test different aspects of broadcast display.
According to the authors of Design Patterns, there are two key elements to an anti-pattern that distinguish it from a bad habit, bad practice, or bad idea: . The anti-pattern is a commonly-used process, structure or pattern of action that, despite initially appearing to be an appropriate and effective response to a problem, has more bad consequences than good ones.
The builder pattern is a design pattern that provides a flexible solution to various object creation problems in object-oriented programming.The builder pattern separates the construction of a complex object from its representation.