feat: during IdCode implementation

The purpose is to include a en coded number in the image to be sure it's
the right image.

src/qualibration/compute_image.rs

@@ -0,0 +1,43 @@
+use super::Treshold;
+use opencv::core::{self, bitwise_and, in_range, Mat, Scalar, Size_};
+use opencv::imgproc;
+use opencv::Result;
+
+pub fn image_warp(img: &Mat, homography: &Mat, h_size: Size_<i32>) -> Result<Mat> {
+    let mut warped_image = Mat::default();
+    imgproc::warp_perspective(
+        &img,
+        &mut warped_image,
+        homography,
+        h_size,
+        imgproc::INTER_CUBIC, // I dont see difference with INTER_CUBIC
+        core::BORDER_CONSTANT,
+        Scalar::default(),
+    )?;
+
+    Ok(warped_image)
+}
+
+pub fn image_treshold(img: &Mat, tresh: &Treshold) -> Result<Mat> {
+    let (t1, s1, l1) = (tresh.min_0 as f64, tresh.min_1 as f64, tresh.min_2 as f64);
+    let (t2, s2, l2) = (tresh.max_0 as f64, tresh.max_1 as f64, tresh.max_2 as f64);
+    let min = Mat::from_slice(&[t1, s1, l1])?;
+    let max = Mat::from_slice(&[t2, s2, l2])?;
+    let mut color_selected = Mat::default();
+    let _ = in_range(img, &min, &max, &mut color_selected);
+    let mut bord_treshed = Mat::default();
+    bitwise_and(&img, &img, &mut bord_treshed, &color_selected)?;
+
+    Ok(bord_treshed)
+}
+
+pub fn image_warp_treshold(
+    img: &Mat,
+    homography: &Mat,
+    h_size: Size_<i32>,
+    tresh: &Treshold,
+) -> Result<Mat> {
+    let warped = image_warp(img, homography, h_size)?;
+    let treshed = image_treshold(&warped, tresh)?;
+    Ok(treshed)
+}