隨機刪除部分圖像/像素

Question

我想知道是否有人知道我會如何隨機刪除/刪除圖像的某些部分。是否有某種過濾器可以指定我想要刪除的圖片的百分比？ （我用我的谷歌搜索來了）

Answer 1

你可能是這樣的： 這不是很有效！因爲它循環選擇，然後刪除這些像素。一遍又一遍地。

我用1 MB的圖片和50％的刪除設置嘗試它花了幾分鐘。所以你被警告。

// call the source document 
var srcDoc = app.activeDocument; 

// Get original width and height 
var imageWidth = srcDoc.width.value; 
var imageHeight = srcDoc.height.value; 

// Selection size for deleting pixels 
// You could make these random 
var sizeX = 20; 
var sizeY = 20; 

// Define the number of parts you want to delete 
// Area of image = imageWidth * imageHeight 
// Example image 1600 x 1200, area = 1920000 pixels 
// To delete 50% would be the same as selecting 
// an area that's (sizeX * sizeY) *2400 times 

var pcent = 0.1; //10% of image 

var area = imageWidth * imageHeight; 
var selArea = sizeX * sizeY; //selection area 
var numParts = pcent * (area/ selArea); 
numParts = parseInt(numParts); 


for (var i = 0; i < numParts; i++) 
{ 

    var randX = Math.floor(Math.random() * (imageWidth-sizeX)); 
    var randY = Math.floor(Math.random() * (imageHeight-sizeY)); 
    // deselect EVERYTHING first 
    srcDoc.selection.deselect(); 

    // select random position of selection 
    selectRectangle(randY, randX, randY+sizeY, randX+sizeX); 

    // Delete those pixels 
    srcDoc.selection.clear(); 

    // deselect EVERYTHING first 
    srcDoc.selection.deselect(); 
} 

// function SELECT RECTANGLE(top, left, bottom, right) 
// 
// Note: co-ordinates are same as script listener 
// and not so human-friendly as t,l,r,b. 
// -------------------------------------------------------- 
function selectRectangle(top, left, bottom, right) 
{ 
    // ======================================================= 
    var id1 = charIDToTypeID("setd"); 
    var desc1 = new ActionDescriptor(); 
    var id2 = charIDToTypeID("null"); 
    var ref1 = new ActionReference(); 
    var id3 = charIDToTypeID("Chnl"); 
    var id4 = charIDToTypeID("fsel"); 
    ref1.putProperty(id3, id4); 
    desc1.putReference(id2, ref1); 
    var id5 = charIDToTypeID("T "); 
    var desc2 = new ActionDescriptor(); 
    var id6 = charIDToTypeID("Top "); 
    var id7 = charIDToTypeID("#Pxl"); 
    desc2.putUnitDouble(id6, id7, top); 
    var id8 = charIDToTypeID("Left"); 
    var id9 = charIDToTypeID("#Pxl"); 
    desc2.putUnitDouble(id8, id9, left); 
    var id10 = charIDToTypeID("Btom"); 
    var id11 = charIDToTypeID("#Pxl"); 
    desc2.putUnitDouble(id10, id11, bottom); 
    var id12 = charIDToTypeID("Rght"); 
    var id13 = charIDToTypeID("#Pxl"); 
    desc2.putUnitDouble(id12, id13, right); 
    var id16 = charIDToTypeID("Rctn"); 
    desc1.putObject(id5, id16, desc2); 

    executeAction(id1, desc1, DialogModes.NO); 

}