s+="<p>TM algorithm uses iterative gradient descent to minimize the regularized inverse filter cost.</p>";
s+="<p>The iterative scheme allows nonnegativity constraint at each iteration.</p>";
s+="<p>Reference: H. Van der Voort, K. Strasters, Restoration of confocal images for quantitative image analysis. J of Microscopy 178, 165-181, 1995</p>";