Photoshop插件-锐化-USM-脚本开发-PS插件

  PS是一款栅格图像编辑软件，模块众多。提供了脚本，动态连接库等多种扩展机制，本文演示如何通过脚本实现USM锐化相关功能，展示从互联网收集而来的一个小插件，供大家学习交流，请勿用于商业用途。

1.插件界面

  本文界面是一系列功能的一部分，将逐步展示，但是功能界面是共同的，如下图所示：

2.关键代码

  大家可通过源代码阅读，来掌握相关技巧，源代码如下：

if (app) {
    try {
        Select();
    } catch (e) {
    }
}
;

function Select() {
    {

        function UnsharpMask() {
            // Unsharp Mask
            function step1(enabled, withDialog) {
                if (enabled != undefined && !enabled)
                    return;
                var dialogMode = (withDialog ? DialogModes.ALL : DialogModes.NO);
                var desc1 = new ActionDescriptor();
                desc1.putUnitDouble(PSKey.Amount, PSUnit.Percent, 100);
                desc1.putUnitDouble(PSKey.Radius, PSUnit.Pixels, 1);
                desc1.putInteger(PSKey.Threshold, 0);
                executeAction(sTID('unsharpMask'), desc1, dialogMode);
            };

            step1(true, true);      // Unsharp Mask
        };


        cTID = function (s) {
            return app.charIDToTypeID(s);
        };
        sTID = function (s) {
            return app.stringIDToTypeID(s);
        };

//
// UnsharpMask.loadSymbols
//   Loading up the symbol definitions like this makes it possible
//   to include several of these generated files in one master file
//   provided a prefix is specified other than the default. It also
//   skips the definitions if PSConstants has already been loaded.
//
        UnsharpMask.loadSymbols = function () {
            var dbgLevel = $.level;
            $.level = 0;
            try {
                PSConstants;
                return; // only if PSConstants is defined
            } catch (e) {
            } finally {
                $.level = dbgLevel;
            }
            var needDefs = true;
            $.level = 0;
            try {
                PSClass;
                needDefs = false;
            } catch (e) {
            } finally {
                $.level = dbgLevel;
            }
            if (needDefs) {
                PSClass = function () {
                };
                PSEnum = function () {
                };
                PSEvent = function () {
                };
                PSForm = function () {
                };
                PSKey = function () {
                };
                PSType = function () {
                };
                PSUnit = function () {
                };
                PSString = function () {
                };
            }

            // We may still end up duplicating some of the following definitions
            // but at least we don't redefine PSClass, etc... and wipe out others
            PSClass.AdjustmentLayer = cTID('AdjL');
            PSClass.Channel = cTID('Chnl');
            PSClass.Curves = cTID('Crvs');
            PSClass.CurvesAdjustment = cTID('CrvA');
            PSClass.Layer = cTID('Lyr ');
            PSClass.Mask = cTID('Msk ');
            PSClass.Point = cTID('Pnt ');
            PSEnum.Blue = cTID('Bl  ');
            PSEnum.Composite = cTID('Cmps');
            PSEnum.Luminosity = cTID('Lmns');
            PSEnum.RGB = cTID('RGB ');
            PSEnum.Target = cTID('Trgt');
            PSEnum.Violet = cTID('Vlt ');
            PSEvent.Invert = cTID('Invr');
            PSEvent.Make = cTID('Mk  ');
            PSEvent.Select = cTID('slct');
            PSEvent.Set = cTID('setd');
            PSKey.Adjustment = cTID('Adjs');
            PSKey.Amount = cTID('Amnt');
            PSKey.Color = cTID('Clr ');
            PSKey.Curve = cTID('Crv ');
            PSKey.Horizontal = cTID('Hrzn');
            PSKey.MakeVisible = cTID('MkVs');
            PSKey.Mode = cTID('Md  ');
            PSKey.Name = cTID('Nm  ');
            PSKey.Opacity = cTID('Opct');
            PSKey.Radius = cTID('Rds ');
            PSKey.Threshold = cTID('Thsh');
            PSKey.To = cTID('T   ');
            PSKey.Type = cTID('Type');
            PSKey.Using = cTID('Usng');
            PSKey.Vertical = cTID('Vrtc');
            PSString.Null = sTID('null');
            PSString.addToSelectionContinuous = sTID('addToSelectionContinuous');
            PSString.presetKind = sTID('presetKind');
            PSString.presetKindDefault = sTID('presetKindDefault');
            PSString.presetKindType = sTID('presetKindType');
            PSString.selectionModifier = sTID('selectionModifier');
            PSString.selectionModifierType = sTID('selectionModifierType');
            PSType.BlendMode = cTID('BlnM');
            PSType.Ordinal = cTID('Ordn');
            PSUnit.Percent = cTID('#Prc');
            PSUnit.Pixels = cTID('#Pxl');
        };

        UnsharpMask.loadSymbols(); // load up our symbols

        UnsharpMask.main = function () {
            UnsharpMask();
        };

        UnsharpMask.main();
    }
};

3.代码转执行

  使用记事本或者notepad++等文本编辑器，将代码拷贝至文本文件，然后修改后缀名为js或者jsx，最后再PS软件菜单文件》脚本》浏览，点执行即可，也可以将脚本放在预设文件夹内，会显示再脚本下的二级子菜单。如下图所示：

4.作者答疑

  如有疑问，请留言。