- all tests passing

src/transform.rs

@@ -879,7 +879,7 @@ mod tests {
             let f = gaussian_smooth(im_a.view(), &[*sigma_val; 2])?;
             let m = gaussian_smooth(im_b.view(), &[*sigma_val; 2])?;
             let bf = BSpline::<0, _>::new(f.view());
-            let bm = BSpline::<3, _>::new(m.view());
+            let bm = BSpline::<1, _>::new(m.view());
             let metric = MattesMetric::new(bf, bm, SamplingArg::Random(3000), 128, edge)?;
 
             let mi_id = metric.evaluate(&identity);
@@ -907,7 +907,7 @@ mod tests {
         let f4 = gaussian_smooth(im_a.view(), &[4.0, 4.0])?;
         let m4 = gaussian_smooth(im_b.view(), &[4.0, 4.0])?;
         let bf4 = BSpline::<0, _>::new(f4.view());
-        let bm4 = BSpline::<3, _>::new(m4.view());
+        let bm4 = BSpline::<1, _>::new(m4.view());
         let metric4 = MattesMetric::new(bf4, bm4, SamplingArg::Random(5000), 128, edge)?;
         let mi_p_coarse = metric4.evaluate(&p);
         let mi_qinv_coarse = metric4.evaluate(&q_inv);
@@ -951,7 +951,7 @@ mod tests {
             let m = gaussian_smooth(im_b.view(), &[4.0, 4.0])?;
             let metric = MattesMetric::new(
                 BSpline::<0, _>::new(f.view()),
-                BSpline::<3, _>::new(m.view()),
+                BSpline::<1, _>::new(m.view()),
                 SamplingArg::Random(3000),
                 128,
                 edge,