软件介绍
Paint.NET 是 windows 平台上的一个绘画以及图像和照片处理软件,它由华盛顿州立大学的学生开发和维护并由微软公司提供项目指导，早期定位于MSPaint的免费替代软件，现在逐渐发展为一个功能强大且易用的的图像和照片处理软件，支持图层,无限制的历史记录，特效，和许多实用工具，并且开放源代码和完全免费，界面看起来有点像Photoshop和SAI。
软件截图
软件特点
简单直观的用户界面
软件使用Windows Aero 界面，具有立体感、透视感，使用户拥有了家的感觉。另外由于其简单直观的界面，使用户很容易找到自己需要的工具。两侧共有四个窗口——工具、历史记录、颜色和图层。用户可以在窗口顶部的下拉菜单中自行选择删除或添加。
键盘快捷键
熟悉PS软件的人都知道，它支持许多键盘快捷键，而本软件也支持。当鼠标悬停在一个工具上时，就会显示出该工具的名称以及所代表的快捷键。
性能
运行很快速，不管你是哪种类型的电脑，软件运行速度都很快。不过这也不能说明它就不会出现崩溃现象，目前只希望它能继续保持下去。
在线社区
软件最大的特色就是有一个活跃的在线社区，用户之间可以进行交流和讨论问题。在论坛上有两个主要特点就是教程和插件。在线社区是一个不错的主意，相信这会帮助用户及时的解决问题。
特殊效果
图像编辑器上有大量的特殊效果，从增强图像效果(包括调整图像的对比度和色彩)到去除红眼等，这里就不再一一列举了。如下：
1、原始图像
2、膨胀效果
3、软化写真效果
4、铅笔素描效果
各种强大的工具
不只具有特殊的效果，它还拥有各式各样的强大工具。从3.0新版本的渐变工具到着色工具。如果你不会用某项工具，还有教程可以帮助你。
历史记录
处理图像的每个动作，都会在历史记录上进行存储，你可以不停的“撤销”与“恢复”。有时候因画错了一个地方而感到很沮丧，但是通过历史记录可以进行挽回。不过小编在这要提醒一句，如果你是一名设计人员，尽量还是少用该功能。
免费
免费的工具总是能得到用户的格外青睐。
更新日志
Changes since v5.0.3:
- Improved: Image->Resize has been updated
- The default resampling mode is now Bicubic, which has been updated to use the Catmull-Rom (“Catrom”) cubic filter. This matches the Bicubic mode of the Move Selected Pixels tool (which uses Direct2D’s “HighQualityCubic” mode).
- Added a new resampling mode, “Bicubic (Smooth)”, which has no sharpening. It produces subjectively blurrier results, but is important for scenarios where you need to completely avoid the (usually) subtle ringing artifacts that other modes (Bicubic, Lanczos, and Adaptive) can introduce due to their added sharpness.
- “Adaptive (Best Quality)” has been renamed to “Adaptive (Sharp)” and is no longer the default resampling mode. It is still a very good choice when resizing photos, but whether you use Adaptive, Bicubic, or Lanczos is up to your own personal preference.
- A new option has been added, “Use gamma correction”, which is enabled by default.
- The text box for typing in a percentage now accepts two digits past the decimal point, e.g. 35.79%
- Improved: Move Selected Pixels (free transform) has been updated
- New: Added a “Multisample Bilinear” sampling mode. This has a sharper look than Anisotropic and avoids the “ringing” artifacts that can be apparent when using Bicubic with high-contrast images (like screenshots). However, it doesn’t usually work as well when reducing a selected area to a much smaller size.
- New: Added a “Gamma mode” button in the toolbar to toggle gamma correction on and off. The default is on, which improves the quality of rendering by preserving luminance (brightness).
- Fixed a bug when using Bicubic sampling that would result in added sharpening when resizing the selected area to 1/8th its original size or smaller
- Improved: The rendering quality of the canvas area has been greatly improved
- Gamma correction is now used for mipmap generation and compositing, ensuring consistent luminance (brightness) and higher quality antialiasing.
- Multisampling is now used for antialiasing, which eliminates pixelation distortions when zooming in, and greatly reduces aliasing artifacts when zooming out.
- Improved: Thumbnails within the app now use gamma correction, which ensures consistent luminance (brightness)
- New: GPU effects and plugins now support gamma correction, with linear gamma being the default rendering mode for new plugins.
- This can be changed by overriding OnInitializeRenderInfo() and setting the renderInfo.GpuEffectColorContext property to GpuEffectColorContext.WorkingSpace (the default is WorkingSpaceLinear)
- GPU effect plugins have better access to color management information via the IGpuEffectImage interface and its ColorContext property. All input images (e.g. Environment.SourceImage) are now provided via this interface.
- In addition to the built-in effects that already render with gamma correction, the following built-in effects now also render with gamma correction:
- Adjustments -> Exposure
- Blurs -> Fragment
- Blurs -> Motion Blur
- Blurs -> Radial Blur
- Blurs -> Zoom Blur
- Distort -> Bulge
- Distort -> Crystalize
- Distort -> Dents
- Distort -> Frosted Glass
- Distort -> Pixelate
- Distort -> Polar Inversion
- Distort -> Tile Reflection
- Distort -> Twist
- Layers -> Rotate/Zoom
- Object -> Drop Shadow
- Photo -> Straighten
- Render -> Julia Fractal
- Render -> Mandelbrot Fractal
- Fixed: Ctrl+G has been reinstated as the shortcut key for Image -> Rotate 90° Counter-Clockwise
- Fixed a rendering glitch in Effects -> Distort -> Dents that would sometimes result in rows or columns of incorrectly colored pixels
- Fixed: Some systems were having problems with Paint.NET not appearing in the “Open With” list in Windows File Explorer. This should now be fixed.
- Fixed: When installing an update, the desktop shortcut is no longer recreated. This means you can delete it without it reappearing after every update. This was a bug accidentally reintroduced back in Paint.NET v4.3.
- Increased the maximum zoom range from 1.5625% (1/64) -> 6,400% to 1% -> 10,000%
- Improved the reliability of the wrapper classes for Windows COM libraries (Direct2D, etc.)
- Improved the /ignoreCorruptPDNChunks command-line parameter to allow an additional type of corrupt PDN image to be partially recovered
- Updated the bundled DDSFileTypePlus plugin to version 1.11.8.0, which adds gamma correction for mipmap generation
- Updated the bundled AvifFileType plugin to version 1.1.25.0, which now uses a checkbox to enable lossless compression
- Updated the bundled WebPFileType plugin to version 1.3.17.0, which reduces some confusion when using lossless compression
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