!(???) && Profit!!!

bookmark.js

/*
 * 1. Find a picture, open it, and disable your popup blocker
 * 2. Enter the following into your address bar
 * 3. ???
 * 4. Profit
 */

javascript:function dr(e){h=e.height;w=e.width;var d=document.createElement("canvas");d.width=w;d.height=h;ct=d.getContext("2d");ct.drawImage(e,0,0);im=ct.getImageData(0,0,w,h);dt=im.data;a=(c=Math.ceil)(w/(z=30));a=2;b=[];str='<p style = "line-height:6px;font-size:6px;padding:0;">';for(j=0;j<c(h/a);j++){for(i=0;i<c(w/a);i++){t=[[],[],[],[]];for(y=j*a;y<(j+1)*a;y++){for(x=i*a;x<(i+1)*a;x++){t[0].push(dt[(pt=y*w*4+x*4)]);t[1].push(dt[pt+1]);t[2].push(dt[pt+2]);t[3].push(dt[pt+3])}}b.push(ls=[(sm=function(f){sg=0;for(id=0;id<f.length;id++){sg+=f[id]==undefined?0:f[id]}sg=c(sg/f.length);return sg>255?255:sg})(t[0]),sm(t[1]),sm(t[2]),sm(t[3])/256]);str+="<span style='background-color:rgba("+ls[0]+","+ls[1]+","+ls[2]+","+ls[3]+")'>&nbsp;&nbsp;&nbsp;</span>"}str+="<br>"}str+="</p>";return str}function dp(f){try{nw=window.open();nw.document.writeln(f)}catch(d){alert(d)}}images=document.images;s="";for(var abc=0;abc<images.length;abc++){if((w=(image=images[abc]).width)>=30&&(h=image.height)>=30){try{s+=dr(image)}catch(err){}}}dp(s);

Full.js

// Compress and add javascript: prefix, then save as a bookmarklet

function process(image){
	h = image.height; w = image.width;
	var buffer = document.createElement("canvas"); // Anonymous canvas
	buffer.width = w;buffer.height=h;
	var ct = buffer.getContext('2d');
	ct.drawImage(image,0,0);
	var data = ct.getImageData(0,0,w,h).data; // This may raise an exception for external images.
	var pxs=2; // Height-Width of the pixel block
	var str='<p style = "line-height:6px;font-size:6px;padding:0;">';
	for (j=0;j<(c=Math.ceil)(h/pxs);j++){
		for (i = 0; i < c(w/pxs); i++){
			t = [[],[],[],[]];
			// Processes a 4x4 px block and averages the color+alpha
			for (y=j*pxs;y<(j+1)*pxs;y++){
				for (x=i*pxs;x<(i+1)*pxs;x++){
					t[0].push(data[(ptr=y*w*4+x*4)]);
					t[1].push(data[ptr+1]);
					t[2].push(data[ptr+2]);
					t[3].push(data[ptr+3]);
				}
			}
			var color=[(sm = function(l){sg=0;for(id=0;id<l.length;id++)sg+=l[id]==undefined?0:l[id];sg=c(sg/l.length);return sg>255?255:sg;})(t[0]),sm(t[1]),sm(t[2]),sm(t[3])/256];
			str += "<span style='background-color:rgba("+color[0]+','+color[1]+','+color[2]+','+color[3]+")'>&nbsp;&nbsp;&nbsp;</span>";
		}
		str += "<br>";
	}
	str += "</p>";

	return str
}

function out(dt){
	try{
		nw = window.open()
		nw.document.writeln(dt);
	}catch(err){
		alert(err);
	}
}

images = document.images;s="";
for(var abc = 0; abc < images.length; abc++){
	if ((w=(image = images[abc]).width) >= 30 && (h=image.height) >= 30){
		try{
			s += dr(image);
		}catch(err){
			// Image is on a different subdomain
			// For now, do not do anything.
		}
	}
}
out(s);

can you give me an image that failed on chrome? PS: You'll need to disable the popup blocker.

It just did nothing, no popup blocker either. I have a weird ass browser though, I'll try on firefox.

oh, can you right click and inspect element, then see if there's an error symbol on the bottom right side corner?

Woah, this is awesome! Having a hard time finding anything I can use it for, though. ;)

Sorry about my ignorance, but, which one is the url that I have to type?
thanks

@tkalve: haha, it's just something that I thought would be cool to do. Most of the things that I write will never be useful :P

@cheluis: Sorry about the confusion, enter the entirety of line 8 on bookmark.js in your address bar. If no images show up, then go to the address of one of the images and try again. (the HTML5 specification disallows getImageData on remote images :/)

Oh this is pretty cool. Thanks!