* update camera doc

docs/doc/en/vision/camera.md

@@ -51,28 +51,30 @@ You can also get greyscale images
 
 ## Setting the frame rate of the camera
 
-Currently the camera supports `2560x1440 30FPS` and `1280x720 60FPS` configurations, the corresponding configurations are loaded by the `width`, `height`, and `fps` parameters passed when creating the `Camera` object.
+Currently the camera supports `30fps` and `60fps` configurations, the frame rate is selected by the `width`, `height`, `fps` parameters passed when creating the `Camera` object, currently the maximum supported resolution is `1280x720` under `60fps`, and the maximum supported resolution is `2560x1440` under `30fps`.
 
 ### Setting the frame rate to 30 fps
 
-``` Python
+```python
 from maix import camera
-cam = camera.Camera(640, 480) # Default frame rate is 30fps.
+cam = camera.Camera(640, 480, fps=30) # set the frame rate to 30 fps
+# or
+cam = camera.Camera(1920, 1280) # Frame rate is set to 30 fps when resolution is higher than 1280x720
 ```
 
 ### Set the frame rate to 60 fps
 
 ```python
 from maix import camera
-cam = camera.Camera(640, 480, fps=60) # set frame rate to 60 fps
+cam = camera.Camera(640, 480, fps=60) # Set frame rate to 60 fps
+# or
+cam = camera.Camera(640, 480) # Set frame rate to 60fps if resolution is less than or equal to 1280x720
 ```
 
 Notes:
 
 1. if `Camera` is passed in a size larger than `1280x720`, for example written as `camera.Camera(1920, 1080, fps=60)`, then the `fps` parameter will be invalidated, and the frame rate will remain at `30fps`.
-2. In `1080x720 60FPS` configuration the frame will be centred and cropped, so the field of view is smaller compared to `2560x1440 30FPS`.
-
-TODO: Support `1920x1080 60FPS` configuration to increase the viewing angle at high resolution!
+2. A `60fps` frame will be offset by a few pixels compared to a `30fps` frame, and the offset will need to be corrected if the viewing angle is critical.
 
 ## Skipping Initial Frames
 

docs/doc/zh/vision/camera.md

@@ -56,28 +56,30 @@ cam = camera.Camera(640, 480, image.Format.FMT_YVU420SP)	# 设置输出NV21图
 
 ## 设置摄像头的帧率
 
-目前摄像头支持`2560x1440 30FPS`和`1280x720 60FPS`两种配置，目前摄像头支持`2560x1440 30FPS`和`1280x720 60FPS`两种配置，由创建`Camera`对象时传入的`width`，`height`，`fps`参数来加载对应的配置。
+目前摄像头支持`30fps`和`60fps`两种配置，由创建`Camera`对象时传入的`width`，`height`，`fps`参数来选择帧率，目前`60fps`下最大支持分辨率`1280x720`， `30fps`下最大支持分辨率`2560x1440`。
 
 ### 设置帧率为30帧
 
 ```python
 from maix import camera
-cam = camera.Camera(640, 480)			# 默认帧率为30fps
+cam = camera.Camera(640, 480, fps=30)			# 设置帧率为30帧
+# or
+cam = camera.Camera(1920, 1280)                  # 分辨率高于1280x720时帧率会设置为30帧
 ```
 
 ### 设置帧率为60帧
 
 ```python
 from maix import camera
-cam = camera.Camera(640, 480, fps=60)	# 设置帧率为60帧
+cam = camera.Camera(640, 480, fps=60)	        # 设置帧率为60帧
+# or
+cam = camera.Camera(640, 480)                  # 分辨率低于或等于1280x720时帧率会设置为60fps
 ```
 
 注意：
 
 1. 如果`Camera`传入的尺寸大于`1280x720`，例如写成`camera.Camera(1920, 1080, fps=60)`，此时`fps`参数将会失效，帧率将保持在`30fps`。
-2. 在`1080x720 60FPS`配置下画面会居中裁剪，因此相对于`2560x1440 30FPS`的视角更小。
-
-TODO：支持`1920x1080 60FPS`配置以增加在高分辨率下的视角
+2. `60fps`与`30fps`的画面相比会有几个像素的偏移，在对视角有严格要求的应用下需要注意修正偏移。
 
 ## 跳过 开头的帧