Posted by
Wayne Rasband on
URL: http://imagej.273.s1.nabble.com/Set-color-for-IJ-run-Draw-tp3702957p3702958.html
> I would like to draw a maximum dark border around my signed
> 16-bit image in a plugin. I tried:
>
>> StackStatistics stackStats = new StackStatistics(imp);
>> double stackMax = stackStats.max;
>> double threshFactor = 32768d;
>> double maxThresh = stackMax + threshFactor;
>> IJ.run("Select All");
>> IJ.runMacro("setColor("+maxThresh+");");
>> IJ.run("Draw");
>>
> but the resulting border is –1034, not the maximum value of
> –2048 that I am trying to get. It states clearly in the Built-in
> Macro Functions that setColor(value) will not change the
> foreground color used by run(“Draw”), but is there a way to
> do this? Or is IJ.run(“Draw”) limited to 8-bit images? Thanks in
> advance.
You can draw a 10 pixel border in the image's minimum displayed pixel
value using:
border = 10;
makeRectangle(border, border, getWidth-border*2, getHeight-border*2);
setBackgroundColor(1, 0, 0);
run("Clear Outside");
You have to set the background to (1,0,0) because (0,0,0) always sets
the background color to 0.
To draw the border outside the image use:
border = 10
w = getWidth+border*2;
h = getHeight+border*2;
setBackgroundColor(1, 0, 0);
run("Canvas Size...", "width="+w+" height="+h+" position=Center");
Use something like the following to draw the border in an arbitrary
color:
requires("1.37e");
border = 10;
value = 50;
w = getWidth+border*2;
h = getHeight+border*2;
run("Canvas Size...", "width="+w+" height="+h+" position=Center");
setColor(value);
setLineWidth(border*2);
drawRect(0, 0, getWidth, getHeight);
This requires ImageJ 1.37e, which adds the drawRect() function and
fixes a bug with the setColor() that caused it to not work correctly
with signed 16 bit images.
-wayne