Fix_BF_lookup_tables.ijm

// Fix funny LUT for LSM or CZI files opened with Bioformats
// parses the file metadata to work around a bioformat bug
// that assigns wrong channel colors.

var r,g,b;
title = getTitle();
id=getImageID;
 
Stack.getDimensions(width, height, channels, slices, frames);
 
activeChannels = "";
for (ch=1;ch<= channels;ch++) {
	dic = getRealChannelColor(ch);
	if ((useDic==0)&(dic==1)) activeChannels= activeChannels+"0";
	else activeChannels= activeChannels+"1";
	applyLUT(ch);
}
 
function applyLUT(c){
	reds=newArray(256);
	greens=newArray(256);
	blues=newArray(256);
	for (index=0;index<256;index++){
		reds[index]=index*r/255;
		greens[index]=index*g/255;
		blues[index]=index*b/255;
	}
	Stack.setChannel(c);
	setLut(reds,greens,blues);
}
 
function getRealChannelColor(channel){
	info=replace(getMetadata('info'),' ','');
	List.setList(info);
	tag="Experiment|AcquisitionBlock|MultiTrackSetup|Track|Channel|Color|#";
	rgb = parseInt(substring(List.get(tag+ channel),3),16);
	r = (rgb&0xff0000)>>16;
	g =(rgb&0x00ff00)>>8;
	b =(rgb&0x0000ff);
	if ((r==g)&&(g==b)) return true;
	else return false;
}