http://www.k-wave.org/forum/topic/a-question-about-2d-iterative-image-reconstruction-using-the-adjoint-example Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 01:02:01 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/a-question-about-2d-iterative-image-reconstruction-using-the-adjoint-example#post-6688 Sun, 09 Dec 2018 23:41:36 +0000 bencox 6688@http://www.k-wave.org/forum/ <p>Hi Mengxiao,</p> <p>Good question. You could choose it by trial-and-error, ie. experience. Or you could choose it by using a line search at each iteration, as mentioned in the example (see <a href="https://en.wikipedia.org/wiki/Line_search">here</a>), although that will require extra valuations of the forward model. In <a href="https://doi.org/10.1088/1361-6560/61/24/8908">this paper</a>, we set the step-size by estimating a Lipschitz constant.</p> <p>Best wishes,<br /> Ben </p> http://www.k-wave.org/forum/topic/a-question-about-2d-iterative-image-reconstruction-using-the-adjoint-example#post-6570 Thu, 23 Aug 2018 23:45:20 +0000 wang mengxiao 6570@http://www.k-wave.org/forum/ <p>Hi all,<br /> I have a question about 2D Iterative Image Reconstruction Using the Adjoint Example. How to set the step length in this example? Thank you very much.</p> <p>Sincerely,<br /> Mengxiao </p>