Merge pull request #26441 from sturkmen72:upd_tutorials

Update tutorials #26441

### Pull Request Readiness Checklist

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- [x] I agree to contribute to the project under Apache 2 License.
- [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
- [x] The PR is proposed to the proper branch
- [x] There is a reference to the original bug report and related work
- [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [ ] The feature is well documented and sample code can be built with the project CMake

doc/tutorials/imgproc/table_of_content_imgproc.markdown

@@ -1,8 +1,15 @@
 Image Processing (imgproc module) {#tutorial_table_of_content_imgproc}
 =================================
 
-Basic
------
+@tableofcontents
+
+The imgproc module in OpenCV is a collection of per-pixel image operations (color conversions, filters) drawing (contours, objects, text), and
+geometry transformations (warping, resize) useful for computer vision.
+Here's an overview of the content in the imgproc module, categorized for easier navigation:
+
+##### Basic
+These tutorials cover fundamental image processing tasks, such as drawing on images, applying filters, and morphological operations.
+
 -   @subpage tutorial_basic_geometric_drawing
 -   @subpage tutorial_random_generator_and_text
 -   @subpage tutorial_gausian_median_blur_bilateral_filter
@@ -14,8 +21,9 @@ Basic
 -   @subpage tutorial_threshold
 -   @subpage tutorial_threshold_inRange
 
-Transformations
----------------
+##### Transformations
+These tutorials explore more advanced transformations that modify the image in various ways, such as filtering, warping, and edge detection.
+
 -   @subpage tutorial_filter_2d
 -   @subpage tutorial_copyMakeBorder
 -   @subpage tutorial_sobel_derivatives
@@ -27,16 +35,18 @@ Transformations
 -   @subpage tutorial_remap
 -   @subpage tutorial_warp_affine
 
-Histograms
-----------
+##### Histograms
+Histograms are vital for image analysis, and these tutorials cover operations like equalization, comparison, and back projection.
+
 -   @subpage tutorial_histogram_equalization
 -   @subpage tutorial_histogram_calculation
 -   @subpage tutorial_histogram_comparison
 -   @subpage tutorial_back_projection
 -   @subpage tutorial_template_matching
 
-Contours
---------
+##### Contours
+Contours are curves that represent the boundaries of objects in an image. These tutorials cover techniques to detect and analyze contours.
+
 -   @subpage tutorial_find_contours
 -   @subpage tutorial_hull
 -   @subpage tutorial_bounding_rects_circles
@@ -44,8 +54,9 @@ Contours
 -   @subpage tutorial_moments
 -   @subpage tutorial_point_polygon_test
 
-Others
-------
+##### Others
+These tutorials cover specialized image processing techniques for more complex tasks like deblurring, noise removal, and image segmentation.
+
 -   @subpage tutorial_distance_transform
 -   @subpage tutorial_out_of_focus_deblur_filter
 -   @subpage tutorial_motion_deblur_filter