vault backup: 2023-03-14 13:29:38

content/notes/05-feature-description-and-matching.md

@@ -46,6 +46,7 @@ A SIMPLE FEATURE DESCRIPTOR
 
 Feature invariance
 ![](https://i.imgur.com/DTsADVj.png)
+> [!INFO] does not handle rotation, changing scale or brightness
 ![](https://i.imgur.com/mNxr2XK.png)
 
 SIFT: SCALE-INVARIANT FEATURE TRANSFORM
@@ -58,6 +59,12 @@ SIFT: SCALE-INVARIANT FEATURE TRANSFORM
 - Rotation invariance by estimating feature orientation 
 - Window is oriented to the dominant image gradient
 
+> [!INFO] not just direct comparision, compared on multiple, permutations
+
+> [!QUESTION] how is this different from doing different perumtations of grayscale vlues
+
+> [!INFO] 
+
 SIFT FEATURE DETECTION/DESCRIPTION
 - Detect blob features and determine their scale 
 - Compute a Histogram of Gradients around the blob 
@@ -65,4 +72,3 @@ SIFT FEATURE DETECTION/DESCRIPTION
 - A square region is used to compute the descriptor 
 - Square’s size from the blob size; orientation from HoG peaks
 
-

content/notes/cosc-342.md

@@ -21,7 +21,7 @@ tags:
 - [x] [[02-colour-representation]]
 - [x] [[03-2d-transforms]]
 - [[04-mosaicing]]
-- [[05-feature-description-and-matching]]
+- [x] [[05-feature-description-and-matching]]
 
 # Info