Error when removing lines from image

[Degubi]

I get no image output/any errors in console when using this code with my own image.
Works fine with dave-orig.png from the test code or scanned-table.jpg from #12

Code:

 var file = Leptonica1.pixRead("bordered.png");
 var pixs1 = LeptUtils.removeLines(file);
 var pixs2 = Leptonica1.pixRotate90(pixs1, 1);
 var pixs3 = LeptUtils.removeLines(pixs2);
 var pixs4 = Leptonica1.pixRotate90(pixs3, -1);

 Leptonica1.pixWrite("result.png", pixs4, ILeptonica.IFF_PNG);

Image:

[Quan Nguyen]

The Line Removal algorithm only works with gray-scale images.

[Degubi]

That explains everything @nguyenq , thank you!

[Degubi]

Converted image to greyscale, works as intented. :) Thank you @nguyenq