[docs] Update "About Pipelines" list (#1889)

Author: alaninnovates

docs/source/docs/pipelines/about-pipelines.md

@@ -10,37 +10,57 @@ A vision pipeline represents a series of steps that are used to acquire an image
 
 ## Types of Pipelines
 
-### Reflective
+### AprilTag / AruCo
+
+This pipeline type is based on detecting AprilTag fiducial markers. More information about AprilTags can be found in the [WPILib documentation](https://docs.wpilib.org/en/stable/docs/software/vision-processing/apriltag/apriltag-intro.html). This pipeline provides easy to use 3D pose information which allows localization.
+
+:::{note}
+In order to get 3D Pose data about AprilTags, you are required to {ref}`calibrate your camera<docs/calibration/calibration:Calibrating Your Camera>`.
+:::
+
+### Object Detection
 
-This is the most common pipeline type and it is based on detecting targets with retroreflective tape. In the contours tab of this pipeline type, you can filter the area, width/height ratio, fullness, degree of speckle rejection.
+This pipeline type is based on detecting objects using a neural network. The object detection pipeline uses a pre-trained model to detect objects in the camera stream.
+
+:::{note}
+This pipeline type is only supported on the Orange Pi 5/5+ coprocessors due to its Neural Processing Unit used by PhotonVision to support running ML-based object detection.
+:::
 
 ### Colored Shape
 
 This pipeline type is based on detecting different shapes like circles, triangles, quadrilaterals, or a polygon. An example usage would be detecting yellow PowerCells from the 2020 FRC game. You can read more about the specific settings available in the contours page.
 
-### AprilTag / AruCo
+### Reflective
 
-This pipeline type is based on detecting AprilTag fiducial markers. More information about AprilTags can be found in the WPILib documentation. While being more performance intensive than the reflective and colored shape pipeline, it has the benefit of providing easy to use 3D pose information which allows localization.
+This pipeline type is based on detecting targets with reflective tape. In the contours tab of this pipeline type, you can filter the area, width/height ratio, fullness, degree of speckle rejection.
 
 :::{note}
-In order to get 3D Pose data about AprilTags, you are required to {ref}`calibrate your camera<docs/calibration/calibration:Calibrating Your Camera>`.
+This pipeline type is not used anymore due to FRC's removal of retro-reflective tape from the game. It is still available as a pipeline for legacy purposes.
 :::
 
 ## Note About Multiple Cameras and Pipelines
 
 When using more than one camera, it is important to keep in mind that all cameras run one pipeline each, all publish to NT, and all send both streams. This will have a noticeable affect on performance and we recommend users limit themselves to 1-2 cameras per coprocessor.
 
-## Pipeline Steps
+## Pipeline Configuration
+
+Each pipeline has a set of tabs that are used to configure the pipeline. All pipelines follow a similar structure with an Input and Output tab, as well as a set of tabs that are specific to the pipeline type.
+
+- Input: This tab allows the raw camera image to be modified before it gets processed. Here, you can set exposure, brightness, gain, orientation, and resolution.
+
+- Output: This allows you to manipulate the detected target via the target offset point (for calculating pitch/yaw) and robot (crosshair) offset. In addition, it allows users to send additional (up to 5) outputs through PhotonLib.
+
+Pipielines also have additional tabs that are specific to the pipeline type. Listed below are the tabs for each pipeline type.
+
+### AprilTag / AruCo Pipelines
+
+- AprilTag: This tab includes AprilTag specific tuning parameters, such as decimate, blur, threads, pose iterations, and more.
 
-Reflective and Colored Shape Pipelines have 4 steps (represented as 4 tabs):
+### Object Detection Pipelines
 
-1. Input: This tab allows the raw camera image to be modified before it gets processed. Here, you can set exposure, brightness, gain, orientation, and resolution.
-2. Threshold (Only Reflective and Colored Shape): This tabs allows you to filter our specific colors/pixels in your camera stream through HSV tuning. The end goal here is having a black and white image that will only have your target lit up.
-3. Contours: After thresholding, contiguous white pixels are grouped together, and described by a curve that outlines the group. This curve is called a "contour" which represent various targets on your screen. Regardless of type, you can filter how the targets are grouped, their intersection, and how the targets are sorted. Other available filters will change based on different pipeline types.
-4. Output: Now that you have filtered all of your contours, this allows you to manipulate the detected target via orientation, the offset point, and offset.
+- Object Detection: This tab allows you to filter results from the neural network, such as confidence, area, and width/height ratio. The end goal of this tab is to filter out any false positives.
 
-AprilTag / AruCo Pipelines have 3 steps:
+### Reflective and Colored Shape Pipelines
 
-1. Input: This is the same as the above.
-2. AprilTag: This step include AprilTag specific tuning parameters, such as decimate, blur, threads, pose iterations, and more.
-3. Output: This is the same as the above.
+- Threshold: This tab allows you to filter out specific colors/pixels in your camera stream through HSV tuning. The end goal here is having a black and white image that will only have your target lit up.
+- Contours: After thresholding, contiguous white pixels are grouped together, and described by a curve that outlines the group. This curve is called a "contour" which represent various targets on your screen. Regardless of type, you can filter how the targets are grouped, their intersection, and how the targets are sorted. Other available filters will change based on different pipeline types.