Photoshop 透明度修整

Question

我是编程新手，现在我只能用 C# 编写代码。我真的需要你的帮助来制作 Photoshop trimming 脚本。我已经搜索了几天，但找不到如何实现我想要的。它是这样的。我有一个从 canvas 的原点偏移的字符的 PNG 图像。现在我想 trim 左右两侧的透明度相等，直到我从左侧或右侧（先到者）击中第一个像素，然后停止 trim（这意味着一侧不会trim由于与原点的偏移，所以一直都通过）。顶部和底部也一样。几个星期以来我为此感到绝望，如果有人能帮助我，我会很高兴。下面是示例图片。

enter image description here

Answer 1

例如：

  // save current preferences and make sure PS units are in pixels
  var startRulerUnits = preferences.rulerUnits
  preferences.rulerUnits = Units.PIXELS

  // initial variables
  var doc = activeDocument;
  var docW = doc.width;
  var docH = doc.height;
  var al = doc.activeLayer;
  // bounds is an array of [left, top, right, bottom] 
  // coordinates from the top left corner
  var bounds = al.bounds; 
  
  // distances from each side of the document
  var left = bounds[0];
  var right = docW - bounds[2];
  var top = bounds[1];
  var bottom = docH - bounds[3];

  // values to resize to. if left is more than right, 
  // then use the smaller value multiplied by two, 
  // say doc width is 400px, distance from right is 50px, from left is 150px:
  // crop to 400-50*2 = 300px
  var resizeWidth = docW - (left > right ? right * 2: left * 2);
  var resizeHeight = docH - (top > bottom ? bottom  * 2: top * 2);

  doc.resizeCanvas(resizeWidth, resizeHeight)

  // restore original units
  preferences.rulerUnits = startRulerUnits

Answer 2

虽然上面的答案是你需要的，（我不是想与之竞争）它可能对以后的参考有用，注意你可以 trim 到最小的边界框，然后调整canvas 之后的尺寸。

//trim image to transparent width
app.activeDocument.trim(TrimType.TRANSPARENT, true, true, true, true);


// adjust canvas size
//app.activeDocument.resizeCanvas(WIDTH, HEIGHT, AnchorPosition.MIDDLECENTER);
// AnchorPosition can vary, depending on what you want

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