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图像处理

SmillaEnlarger:提供高质量照片放大效果

有时候手你可能会遇到这样的问题,需要将一张图片作为背景,但苦于手里合适的图片尺寸太小。而将其放大后又会严重失真,出现很多马赛克,影响整体效果。很多人可能已经知道 BenVista PhotoZoom Pro 能够提高放大后图片的品质并保证图片的质量,但其价格不菲。而 SmillaEnlarger 则是功能类似于 PhotoZoom 的开源替代,其同样能够提供高质量的放大后的照片。

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SmillaEnlarger 简介

SmillaEnlarger (原 Image Enlarger) 是开源软件,采用 C++ 与 QT 开发,能够运行于 Mac OS X,Windows 以及 Linux 等多种平台上。软件下载解压后即可使用,无需安装。软件界面十分直观,操作简单,通过拉动滑动按钮就可以调节各项参数。软件所提供的各项参数,能够对图像质量的多个方面进行调解,从而获得高质量的照片放大效果,避免模糊、马赛克和尖锐化等问题。其局部预览功能也十分便利,你可以即时的预览放大后的图片效果。

SmillaEnlarger 使用

首先,界面的左侧是与图片输出相关的各项设置。

1. Output Dimensions – 其中对输出图片的尺寸进行指定,包括了各种情况,例如拉伸以适应,剪裁以适应,指定宽度和(或)高度等。

2. Enlarger Parameter – 内建里几种配置文件,包含了各项参数的设定,以适用于不同情况,例如锐化,锐化 & 去噪点等。使用者也可以自己创建配置文件来保存自己的参数设置。可以在后侧面板下方,点击 “New” 来新建配置。

3. Thumbnail Preview – 缩略图预览。

4. Write Result to – 即输出文件的文件名。可以连续输出文件而无需更改文件名,SmillaEnlarger 会自动为文件名添加后缀,例如 enlarged0.jpg, enlarged1.jpg, enlarged2.jpg … In folder 参数显示的是默认保存图片的路径。可以通过取消选择 “Use Source Folder” 并单击 “Change Folder” 来更改。

5. Enlarge & Save – 所有参数设置好后并且你已经满意放大的效果后,单击该按钮进行实际的放大并保存文件。

界面的右侧面板就是对实际图片进行操作的地方。

1. Cropping 选项卡 – 可以通过拖拽的方式将要放大的图片放在此处。也可以通过 “Open…” 按钮来选取一幅图片。当选取一幅图片后,选项卡下的列表框就会列出与操作文件同目录下的所有文件,方便连续操作。选项卡低端的 “Cropping Format” 用来指定剪裁大小(你可以在图片中选定一部分来放大),而 “Center View” 用来将选中的部分至于中央。

2. Parameter 选项卡 – 图片区可以对选择区域进行拖拽。下拉列表框中列出了所有的配置文件,”New” 可以新建你自己的配置文件来保存参数设置。”Del” 删除选中的配置文件。默认使用配置文件的情况下,各项参数是不能修改的,但选择 “Allow Changes” 后即可修改各项参数。

SmillaEnlarger 放大效果展示

放大前照片
放大前照片
放大后照片
放大后照片

以下图片来自国外论坛,对几种图片放大软件效果的比较。图中的 Image Enlarger 即为现在的 SmillaEnlarger 的早期版本,点击查看大图。

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