我想要在网页上并排放置3张图像,它们的比例各不相同,我希望它们最终共享一个特定的高度(待计算)。所以我要说我的页面宽度为't',图像的当前尺寸为h1 x w1,h2 x w2,h3 x w3
我为2张图片制定了一个公式,但我无法理解3张或更多图片:
(h1*h2*t) / (w1*h2 + h1*w2)
答案 0 :(得分:4)
你必须尊重的条件是:
k1*w1 + k2*w2 + ... + kn*wn = t
其中kn
是应用于宽度的缩放常量,以保持图像的原始比例具有新的高度。
我们可以说
kn = h_new / hn
其中h_new
是所有图片的新高度。从那里它是所有替代和隔离
h_new*w1/h1 + h_new*w2/h2 + ... + h_new*wn/hn = t
h_new * (w1/h1 + w2/h2 + ... + wn/hn) = t
h_new = t / (w1/h1 + w2/h2 + ... + wn/hn)
我认为应该是这样,如果我完全错了,请回复! :)
答案 1 :(得分:1)
我在javascript中编写了一个photoshop CS5脚本来调整大小,并根据@ vache的公式保存打开的图像。希望有人发现它有用:
var outputFolder = Folder.selectDialog("Select a folder for the output files")
if(outputFolder != null) {
var startRulerUnits = app.preferences.rulerUnits
var startDisplayDialogs = app.displayDialogs
// Set Adobe Photoshop CS5 to use pixels and display no dialogs
app.preferences.rulerUnits = Units.PIXELS
app.displayDialogs = DialogModes.NO
do {
var totalWidth = parseInt( prompt("How wide do they need to fit into?", 844) );
}
while(totalWidth <= 0 || isNaN(totalWidth));
var DL = documents.length;
var totalArea = 0;
for(a=0;a<DL;a++){
var cur = documents[a];
totalArea += cur.width / cur.height;
}
var newHeight = totalWidth / totalArea;
for(a=1;a<=DL;a++){
activeDocument = documents[a-1];
var AD=activeDocument;
// bring to front
app.activeDocument = AD;
AD.changeMode(ChangeMode.RGB);
var imgName= AD.name.toLowerCase();
imgName = imgName.substr(0, imgName.length -4);
AD.flatten();
AD.resizeImage(null,UnitValue(newHeight,"px"),null,ResampleMethod.BICUBIC);
//AD.resizeImage(UnitValue(newWidth,"px"),null,null,ResampleMethod.BICUBIC);
saveForWeb(outputFolder, imgName, AD);
}
// Close all the open documents
while (app.documents.length) {
app.activeDocument.close(SaveOptions.DONOTSAVECHANGES)
}
// Reset the application preferences
app.preferences.rulerUnits = startRulerUnits;
app.displayDialogs = startDisplayDialogs;
}
function saveForWeb(outputFolderStr, filename, AD)
{
var opts, file;
opts = new ExportOptionsSaveForWeb();
opts.format = SaveDocumentType.JPEG;
opts.quality = 80;
if (filename.length > 27) {
file = new File(outputFolderStr + "/temp.jpg");
AD.exportDocument(file, ExportType.SAVEFORWEB, opts);
file.rename(filename + ".jpg");
}
else {
file = new File(outputFolderStr + "/" + filename + ".jpg");
AD.exportDocument(file, ExportType.SAVEFORWEB, opts);
}
}