* optimize apriltag doc

sipeed · Jan 10, 2025 · e9417cb · e9417cb
1 parent a4d1fd5
commit e9417cb
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diff --git a/docs/doc/en/vision/apriltag.md b/docs/doc/en/vision/apriltag.md
@@ -310,7 +310,7 @@ The process consists of two steps:
 
       apriltags = img.find_apriltags()
       for a in apriltags:
-          k = caculate_k(a.z_translation(), 20)
+          k = caculate_k(a.z_translation(), 200)
           print(f"k:{k}")
       disp.show(img)
   ```
@@ -353,7 +353,7 @@ k: Constant coefficient.
 Returns the distance in mm.
 '''
 def calculate_distance(x_trans, y_trans, z_trans, k):
-    return k * math.sqrt(x_trans * x_trans + y_trans * y_trans + z_trans * z_trans)
+    return abs(k * math.sqrt(x_trans * x_trans + y_trans * y_trans + z_trans * z_trans))
 
 cam = camera.Camera(160, 120)
 disp = display.Display()

diff --git a/docs/doc/zh/vision/apriltag.md b/docs/doc/zh/vision/apriltag.md
@@ -300,7 +300,7 @@ while 1:
 
       apriltags = img.find_apriltags()
       for a in apriltags:
-          k = caculate_k(a.z_translation(), 20)
+          k = caculate_k(a.z_translation(), 200)
           print(f"k:{k}")
       disp.show(img)
   ```
@@ -343,7 +343,7 @@ k: 常量系数
 返回距离, 单位mm
 '''
 def calculate_distance(x_trans, y_trans, z_trans, k):
-    return k * math.sqrt(x_trans * x_trans + y_trans * y_trans + z_trans * z_trans)
+    return abs(k * math.sqrt(x_trans * x_trans + y_trans * y_trans + z_trans * z_trans))
 
 cam = camera.Camera(160, 120)
 disp = display.Display()