diff --git a/src/linear_log.rs b/src/linear_log.rs
index 352b3ea..d195479 100644
--- a/src/linear_log.rs
+++ b/src/linear_log.rs
@@ -55,16 +55,6 @@ pub fn find_log_offset_for_end(end: f64, line_offset: f64, slope: f64, base: f64
     offset_up
 }
 
-// Transition point between log and linear.
-//
-// Returned as (linear, non-linear).
-pub fn transition_point(line_offset: f64, slope: f64, log_offset: f64, base: f64) -> (f64, f64) {
-    let transition = 1.0 / (slope * base.ln());
-    let k = transition + log_offset;
-
-    (k, (k - line_offset) * slope)
-}
-
 //-------------------------------------------------------------
 
 /// Generates Rust code for a both linear-to-log and log-to-linear
diff --git a/src/optimize_log.rs b/src/optimize_log.rs
index 790b7e0..b556ef3 100644
--- a/src/optimize_log.rs
+++ b/src/optimize_log.rs
@@ -45,7 +45,6 @@ pub fn find_parameters(lut: &[f32]) {
         100,
     );
     let log_offset = crate::linear_log::find_log_offset_for_end(end, offset, slope, base);
-    let transition = crate::linear_log::transition_point(offset, slope, log_offset, base);
 
     // Calculate the error of our model.
     let mut max_err = 0.0f64;
diff --git a/src/test_image.rs b/src/test_image.rs
index fcd6035..af450c3 100644
--- a/src/test_image.rs
+++ b/src/test_image.rs
@@ -61,6 +61,7 @@ pub fn build() -> Vec<[f32; 3]> {
 
 /// Gives the index in the test image Vec of the given
 /// gray-gradient index.
+#[allow(unused)]
 #[inline(always)]
 pub fn gray_idx(idx: usize) -> usize {
     idx
@@ -68,6 +69,7 @@ pub fn gray_idx(idx: usize) -> usize {
 
 /// Gives the index in the test image Vec of the given
 /// red-gradient index.
+#[allow(unused)]
 #[inline(always)]
 pub fn red_idx(idx: usize) -> usize {
     GRADIENT_LEN + idx
@@ -75,6 +77,7 @@ pub fn red_idx(idx: usize) -> usize {
 
 /// Gives the index in the test image Vec of the given
 /// green-gradient index.
+#[allow(unused)]
 #[inline(always)]
 pub fn green_idx(idx: usize) -> usize {
     GRADIENT_LEN * 2 + idx
@@ -82,6 +85,7 @@ pub fn green_idx(idx: usize) -> usize {
 
 /// Gives the index in the test image Vec of the given
 /// blue-gradient index.
+#[allow(unused)]
 #[inline(always)]
 pub fn blue_idx(idx: usize) -> usize {
     GRADIENT_LEN * 3 + idx
@@ -89,6 +93,7 @@ pub fn blue_idx(idx: usize) -> usize {
 
 /// Gives the index in the test image Vec of the given
 /// rgb table indices.
+#[allow(unused)]
 #[inline(always)]
 pub fn rgb_idx(r_idx: usize, g_idx: usize, b_idx: usize) -> usize {
     (GRADIENT_LEN * 4) + (r_idx * TABLE_SIZE * TABLE_SIZE) + (g_idx * TABLE_SIZE) + b_idx