photoshop 改变尺寸后图片质量的几个选项

alvinwoolf

图书封面大小改变后，保存图片质量会有几个选项，看到了它们的解释说明和作用，感觉还是有点意思的，可以用来为自己的电子书籍封面进行完美，让电子书籍看起来更加美观，以合乎自己的审美要求。

顺手复制一下，赚取第5个币，版本是 Photoshop CC。


1.Automatic: Photoshop automatically decides which resampling method to use, regardless of whether you are increasing or decreasing the size of an image.

2.Preserve Details (enlargement): This gives you access to the Noise reduction slider to smooth out noise when upsampling an image.

3.Bicubic Smoother (enlargement): This is based on Bicubic interpolation but creates a smoother image.

4.Bicubic Sharper (reduction): This uses Bicubic interpolation with sharpening for reducing images. If this method creates too much sharpening in your image, use Bicubic instead.

5.Bicubic (smoother gradients): This method produces smooth tonal gradations and is a better option than Nearest Neighbor or Bilinear.

6.Nearest Neighbor (hard edges): This method replicates the pixels in an image. It preserves hard edges and will create a smaller file with illustration that doesn't use anti-aliasing on the edges. The down side is it can also create jagged effects, which can appear if the image is scaled, distorted or manipulated.

7.Bilinear: This method adds pixels by creating average values of surrounding pixels.