Javascript 在Photoshop脚本中获取一个像素的颜色
我试图找出如何获得一个定义像素的颜色 在我的想象中,它应该是这样的:Javascript 在Photoshop脚本中获取一个像素的颜色,javascript,photoshop-script,cs4,Javascript,Photoshop Script,Cs4,我试图找出如何获得一个定义像素的颜色 在我的想象中,它应该是这样的: color = get.color.Pixel(x,y); 也许有人能帮我处理这段代码 Photoshop的JavaScript API并不像您在问题中想象的那样提供机制 您需要使用Document.colorSamplers.add([x,y])方法,然后通过其属性读取每个组件的颜色值: 以下要点说明了如何获得给定坐标的x,y的rgb或cmyk值: #目标photoshop //定义要采样的像素的x和y坐标。 var x=
color = get.color.Pixel(x,y);
也许有人能帮我处理这段代码 Photoshop的JavaScript API并不像您在问题中想象的那样提供机制 您需要使用
Document.colorSamplers.add([x,y])
方法,然后通过其属性读取每个组件的颜色值:
以下要点说明了如何获得给定坐标的x,y
的rgb
或cmyk
值:
#目标photoshop
//定义要采样的像素的x和y坐标。
var x=1;
变量y=1;
//在图像中给定的x和y坐标处添加颜色采样器。
var pointSample=app.activeDocument.colorSamplers.add([(x-1),(y-1)];
//获取RGB值的数组。
变量rgb=[
pointSample.color.rgb.red,
pointSample.color.rgb.green,
pointSample.color.rgb.blue
];
//获取取整的CMYK值数组。
变量cmyk=[
数学圆(pointSample.color.cmyk.cyan),
数学圆(pointSample.color.cmyk.magenta),
数学圆(pointSample.color.cmyk.yellow),
Math.round(pointSample.color.cmyk.black)
];
//取下颜色采样器。
pointSample.remove();
//显示完整的RGB值和每个组件颜色。
警报('RGB:'+RGB)
警报('红色:'+rgb[0])
警报('绿色:'+rgb[1])
警报('蓝色:'+rgb[2])
//显示完整的CMYK值和每个组件颜色。
警报('CMYK:'+CMYK)
警报('青色:'+cmyk[0])
警报('洋红:'+cmyk[1])
警报('黄色:'+cmyk[2])
警报('黑色:'+cmyk[3])
下面是一个使用颜色采样器的简单脚本。它被设置为返回RGB值
function PixelSampler(doc) {
this.doc = doc
this.doc.colorSamplers.removeAll();
this.sampler = this.doc.colorSamplers.add([0, 0]);
}
// Return an array of R, G, B pixel values for a particular coordinate.
PixelSampler.prototype.get = function (x, y) {
this.sampler.move([x, y]);
const R = this.sampler.color.rgb.red;
const G = this.sampler.color.rgb.green;
const B = this.sampler.color.rgb.blue;
return [R, G, B];
}
////////////////////////////////////////////////////////
/// SOME TESTS /////////////////////////////////////////
////////////////////////////////////////////////////////
const p = new PixelSampler(app.activeDocument);
alert("Pixel 0 =\n\n" + p.get(0, 0));
$.hiresTimer;
var n = 1000; //p.width * p.height;
for (var i = 0; i < n; i++) p.get(i, 0);
sec = ($.hiresTimer / 1000 / 1000);
alert("Got " + (n / 1000) + " kilopixels in " + sec.toFixed(2) + " seconds.");
功能像素采样器(doc){
this.doc=doc
this.doc.colorSamplers.removeAll();
this.sampler=this.doc.colorSamplers.add([0,0]);
}
//返回特定坐标的R、G、B像素值数组。
PixelSampler.prototype.get=函数(x,y){
这个.sampler.move([x,y]);
const R=this.sampler.color.rgb.red;
const G=this.sampler.color.rgb.green;
常量B=this.sampler.color.rgb.blue;
返回[R,G,B];
}
////////////////////////////////////////////////////////
///一些测试/////////////////////////////////////////
////////////////////////////////////////////////////////
const p=新的像素采样器(app.activeDocument);
警报(“像素0=\n\n”+p.get(0,0));
$hiresTimer;
var n=1000//p、 宽度*p.高度;
对于(var i=0;i
这在我的机器上为我提供每秒100像素的像素值
我找到并整理了一下脚本。基本上,这个想法是:
将当前图像另存为原始位图
读回,但在javascript方面
对javascript端的像素进行所有访问
这为我提供了每秒72000像素的像素值,不包括将原始数据写入磁盘并读回的开销。它还有一个额外的好处,那就是你也可以设置像素值
// Adapted from https://community.adobe.com/t5/photoshop/get-index-of-each-pixel/td-p/10022899?page=1
// The purpose is to query (and change) pixel values quickly.
//
// The secret to speed is doing everything on the script side rather than ask Photoshop to do things.
// We use files on disk as an intermediary; on the script side, we read / write it as a binary file; on the
// Photoshop side, we save / open it as a raw bitmap.
//
// Only works on RGB 8bpp images, but this could be easily extended to support others.
function RawPixels(doc) {
this.doc = doc;
const currentActiveDoc = app.activeDocument;
// Obtain the width and height in pixels of the desired document.
const currentRulerUnits = app.preferences.rulerUnits;
app.preferences.rulerUnits = Units.PIXELS;
app.activeDocument = doc;
this.width = Number(doc.width.value);
this.height = Number(doc.height.value);
this.length = this.width * this.height;
this.pixelData = "";
// Return the ruler to its previous state.
app.preferences.rulerUnits = currentRulerUnits;
try {
// We're going to save this document as a raw bitmap to be able to read back in the pixel values
// themselves.
const file = new File(Folder.temp.fsName + "/" + Math.random().toString().substr(2) + ".raw");
// Set up the save action.
// See https://helpx.adobe.com/photoshop/using/file-formats.html#photoshop_raw_format for some info,
// and more technical at https://www.adobe.com/devnet-apps/photoshop/fileformatashtml/
var rawFormat = new ActionDescriptor();
rawFormat.putString(stringIDToTypeID("fileCreator"), "8BIM");
rawFormat.putBoolean(stringIDToTypeID("channelsInterleaved"), true);
var saveAction = new ActionDescriptor();
saveAction.putObject(stringIDToTypeID("as"), stringIDToTypeID("rawFormat"), rawFormat);
saveAction.putPath(stringIDToTypeID("in"), file);
saveAction.putBoolean(stringIDToTypeID("copy"), false);
executeAction(stringIDToTypeID("save"), saveAction, DialogModes.NO);
// File is saved; now read it back in as raw bytes.
file.open("r");
file.encoding = "BINARY";
this.pixelData = file.read();
const err = file.error;
file.close();
file.remove();
file = null;
if (err) alert(err);
}
catch (e) { alert(e); }
// Return focus to whatever the user had.
app.activeDocument = currentActiveDoc;
}
// Calculate offset from x, y coordinates. Does not check for valid bounds.
getOffset = function(x, y) {
if (y == undefined) {
// allow linear indices too
y = Math.floor(x / this.width);
x = x - y * this.width;
}
return (y * this.width + x) * 3;
}
// Return an array of R, G, B pixel values for a particular coordinate.
RawPixels.prototype.get = function (x, y) {
const off = getOffset(x, y);
const R = this.pixelData.charCodeAt(off + 0);
const G = this.pixelData.charCodeAt(off + 1);
const B = this.pixelData.charCodeAt(off + 2);
return [R, G, B];
}
// Set the pixel at x, y to the values in RGB.
RawPixels.prototype.set = function (RGB, x, y) {
const off = getOffset(x, y);
// note: note checking that length of p = 3!
const R = String.fromCharCode(RGB[0]);
const G = String.fromCharCode(RGB[1]);
const B = String.fromCharCode(RGB[2]);
this.pixelData = this.pixelData.substr(0, off) + R + G + B + this.pixelData.substr(off + 3);
}
// If any changes were made to the pixels, we need to save them to disk and have Photoshop read that file back in.
// We do that by creating a new layer in the desired document.
RawPixels.prototype.create_layer = function () {
try {
const file = new File(Folder.temp.fsName + "/" + Math.random().toString().substr(2) + ".raw");
file.open("w");
file.encoding = "BINARY";
file.write(this.pixelData);
const err = file.error;
file.close();
if (err) { file.remove(); alert(err); return; }
var rawFormat = new ActionDescriptor();
rawFormat.putInteger(stringIDToTypeID("width"), this.width);
rawFormat.putInteger(stringIDToTypeID("height"), this.height);
rawFormat.putInteger(stringIDToTypeID("channels"), 3);
rawFormat.putBoolean(stringIDToTypeID("channelsInterleaved"), true);
rawFormat.putInteger(stringIDToTypeID("depth"), 8);
var openAction = new ActionDescriptor();
openAction.putPath(stringIDToTypeID("null"), file);
openAction.putObject(stringIDToTypeID("as"), stringIDToTypeID("rawFormat"), rawFormat);
executeAction(stringIDToTypeID("open"), openAction, DialogModes.NO);
file.remove();
// The new active document is the file we just opened. Duplicate its contents into
// a new layer in our desired document, then close this temporary file.
app.activeDocument.activeLayer.duplicate(this.doc.layers[0], ElementPlacement.PLACEBEFORE);
const tempDoc = app.activeDocument;
app.activeDocument = this.doc;
this.doc.layers[0].name = "Pixels";
app.activeDocument = tempDoc;
app.activeDocument.close(SaveOptions.DONOTSAVECHANGES);
app.activeDocument = this.doc;
}
catch (e) { alert(e); }
}
////////////////////////////////////////////////////////
/// SOME TESTS /////////////////////////////////////////
////////////////////////////////////////////////////////
$.hiresTimer;
const p = new RawPixels(app.activeDocument);
var sec = ($.hiresTimer / 1000 / 1000);
alert("Init RawPixels in " + sec.toFixed(2) + " seconds");
alert("Pixel 0 =\n\n" + p.get(0));
var a = new Array();
for (var i = 0; i < 100; i++) a.push(p.get(i));
alert("Pixel 0-99 = \n\n" + a.toSource());
p.set(0, [1, 200, 3]);
alert("New Pixel 0=\n\n" + p.get(0));
$.hiresTimer;
var n = p.width * p.height;
for (var i = 0; i < n; i++) p.get(i);
sec = ($.hiresTimer / 1000 / 1000);
alert("Got " + (n / 1000 / 1000) + " megapixels in " + sec.toFixed(2) + " seconds.");
$.hiresTimer;
n = 10;
for (var i = 0; i < n; i++) p.set([255, i * 20, i * 10], 1 + i * 2);
sec = ($.hiresTimer / 1000 / 1000);
//alert("Set " + n + " pixels in " + sec.toFixed(2) + " seconds");
p.create_layer();
alert("New layer created with new pixels");
//改编自https://community.adobe.com/t5/photoshop/get-index-of-each-pixel/td-p/10022899?page=1
//其目的是快速查询(和更改)像素值。
//
//提高速度的秘诀是在脚本方面做每件事,而不是让Photoshop去做。
//我们使用磁盘上的文件作为中介;在脚本端,我们将其作为二进制文件读/写;上
//在Photoshop端,我们将其保存/打开为原始位图。
//
//仅适用于RGB 8bpp图像,但可以轻松扩展以支持其他图像。
函数(doc){
this.doc=doc;
const currentActiveDoc=app.activeDocument;
//获取所需文档的宽度和高度(以像素为单位)。
const currentRulerUnits=app.preferences.rulerUnits;
app.preferences.rulerUnits=单位.PIXELS;
app.activeDocument=doc;
this.width=编号(doc.width.value);
this.height=编号(doc.height.value);
this.length=this.width*this.height;
此.pixelData=“”;
//将标尺恢复到以前的状态。
app.preferences.rulerUnits=currentRulerUnits;
试一试{
//我们将此文档保存为原始位图,以便能够读回像素值
//他们自己。
常量文件=新文件(Folder.temp.fsName+“/”+Math.random().toString().substr(2)+“.raw”);
//设置保存操作。
//看https://helpx.adobe.com/photoshop/using/file-formats.html#photoshop_raw_format 要了解一些信息,
//而且更技术化https://www.adobe.com/devnet-apps/photoshop/fileformatashtml/
var rawFormat=新的ActionDescriptor();
putString(stringIDToTypeID(“fileCreator”),“8BIM”);
putBoolean(stringIDToTypeID(“channelsInterleaved”),true;
var saveAction=new ActionDescriptor();
putObject(stringIDToTypeID(“as”)、stringIDToTypeID(“rawFormat”)、rawFormat);
saveAction.putPath(stringIDToTypeID(“in”),文件);
saveAction.putBoolean(stringIDToTypeID(“复制”),false;
executeAction(stringIDToTypeID(“保存”)、saveAction、DialogModes.NO);
//文件已保存;现在将其作为原始字节读回。
文件。打开(“r”);
file.encoding=“BINARY”;
this.pixelData=file.read();
const err=file.error;
file.close();
file.remove();
file=null;
如果(错误)警报(错误);
}
捕获(e){警报(e);}
//将焦点返回到用户拥有的任何内容。
app.activeDocument=currentActiveDoc;
}
//计算x、y坐标的偏移量。不检查有效边界。
getOffset=函数(x,y){
如果(y==未定义){
//也允许线性索引
y=数学地板(x/此宽度);
x=x-y*此宽度;
}
返回值(y*this.width+x)*