package/opencv4-contrib: properly note dependencies between modules

Also, add myself to the DEVELOPERS file

Signed-off-by: Woodrow Douglass <wdouglass@carnegierobotics.com>
[Arnout: fix typo BR2_PACKAGE_OPENCV4_LIB_OBJDETECCT]
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>

DEVELOPERS

@@ -3101,6 +3101,10 @@ F:	package/python-pyusb/
 N:	Wojciech Niziński <niziak@spox.org>
 F:	package/fwup/
 
+N:	Woodrow Douglass <wdouglass@carnegierobotics.com>
+F:	package/opencv4
+F:	package/opencv4-contrib
+
 N:	Xuanhao Shi <X15000177@gmail.com>
 F:	board/ti/am62x-sk/
 F:	board/ti/am64x-sk/

package/opencv4-contrib/Config.in

@@ -17,6 +17,7 @@ config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_ALPHAMAT
 
 config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_ARUCO
 	bool "aruco"
+	select BR2_PACKAGE_OPENCV4_LIB_CALIB3D
 	help
 	  ArUco and ChArUco Markers -- Augmented reality ArUco marker
 	  and "ChARUco" markers where ArUco markers embedded inside the
@@ -29,6 +30,7 @@ config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_BARCODE
 
 config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_BGSEGM
 	bool "bgsegm"
+	select BR2_PACKAGE_OPENCV4_LIB_VIDEO
 	help
 	  Background segmentation algorithm combining statistical
 	  background image estimation and per-pixel Bayesian
@@ -43,6 +45,7 @@ config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_BIOINSPIRED
 
 config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_CCALIB
 	bool "ccalib"
+	select BR2_PACKAGE_OPENCV4_LIB_HIGHGUI
 	help
 	  Custom Calibration -- Patterns for 3D reconstruction,
 	  omnidirectional camera calibration, random pattern calibration
@@ -71,6 +74,7 @@ config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_DATASETS
 
 config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_DNN_OBJDETECT
 	bool "dnn_objdetect"
+	select BR2_PACKAGE_OPENCV4_LIB_DNN
 	help
 	  Object Detection using CNNs -- Implements compact CNN Model
 	  for object detection. Trained using Caffe but uses
@@ -78,6 +82,7 @@ config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_DNN_OBJDETECT
 
 config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_DNN_SUPERRES
 	bool "dnn_superres"
+	select BR2_PACKAGE_OPENCV4_LIB_DNN
 	help
 	  Superresolution using CNNs -- Contains four trained
 	  convolutional neural networks to upscale images.
@@ -90,12 +95,14 @@ config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_DNNS_EASILY_FOOLED
 
 config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_DPM
 	bool "dpm"
+	select BR2_PACKAGE_OPENCV4_LIB_OBJDETECT
 	help
 	  Deformable Part Model -- Felzenszwalb's Cascade with
 	  deformable parts object recognition code.
 
 config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_FACE
 	bool "face"
+	select BR2_PACKAGE_OPENCV4_LIB_OBJDETECT
 	help
 	  Face Recognition -- Face recognition techniques: Eigen, Fisher
 	  and Local Binary Pattern Histograms LBPH methods.
@@ -165,6 +172,7 @@ config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_MCC
 
 config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_OPTFLOW
 	bool "optflow"
+	select BR2_PACKAGE_OPENCV4_LIB_VIDEO
 	help
 	  Optical Flow -- Algorithms for running and evaluating
 	  deepflow, simpleflow, sparsetodenseflow and motion
@@ -219,6 +227,11 @@ config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_SALIENCY
 
 config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_SFM
 	bool "sfm"
+	select BR2_PACKAGE_OPENCV4_LIB_IMGPROC
+	select BR2_PACKAGE_OPENCV4_LIB_IMGCODECS
+	select BR2_PACKAGE_EIGEN
+	select BR2_PACKAGE_GLOG
+	select BR2_PACKAGE_GFLAGS
 	help
 	  Structure from Motion -- This module contains algorithms
 	  to perform 3d reconstruction from 2d images. The core of
@@ -231,6 +244,7 @@ config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_SHAPE
 
 config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_STEREO
 	bool "stereo"
+	select BR2_PACKAGE_OPENCV4_CONTRIB_LIB_TRACKING
 	help
 	  Stereo Correspondence -- Stereo matching done with different
 	  descriptors: Census / CS-Census / MCT / BRIEF / MV and dense
@@ -244,6 +258,7 @@ config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_STRUCTURED_LIGHT
 
 config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_SUPERRES
 	bool "superres"
+	select BR2_PACKAGE_OPENCV4_LIB_VIDEO
 	help
 	  Super Resolution
 
@@ -262,12 +277,15 @@ config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_TEXT
 
 config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_TRACKING
 	bool "tracking"
+	select BR2_PACKAGE_OPENCV4_LIB_VIDEO
 	help
 	  Vision Based Object Tracking -- Use and/or evaluate different
 	  visual object tracking techniques.
 
 config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_VIDEOSTAB
 	bool "videostab"
+	select BR2_PACKAGE_OPENCV4_LIB_VIDEO
+	select BR2_PACKAGE_OPENCV4_LIB_PHOTO
 	help
 	  Video Stabilization
 
@@ -299,6 +317,7 @@ config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_XIMGPROC
 
 config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_XOBJDETECT
 	bool "xobjdetect"
+	select BR2_PACKAGE_OPENCV4_LIB_OBJDETECT
 	help
 	  Boosted 2D Object Detection -- Uses a Waldboost cascade and
 	  local binary patterns computed as integral features for 2D
@@ -306,6 +325,7 @@ config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_XOBJDETECT
 
 config BR2_PACKAGE_OPENCV4_CONTRIB_LIB_XPHOTO
 	bool "xphoto"
+	select BR2_PACKAGE_OPENCV4_LIB_PHOTO
 	help
 	  Extra Computational Photography -- Additional photo processing
 	  algorithms: Color balance / Denoising / Inpainting.

package/opencv4/opencv4.mk

@@ -203,12 +203,10 @@ OPENCV4_CONF_OPTS += \
 	-DINSTALL_PYTHON_EXAMPLES=OFF \
 	-DINSTALL_TO_MANGLED_PATHS=OFF
 
-# Disabled features (mostly because they are not available in Buildroot), but
+# Disabled features (mostly because they are not available in Buildroot)
-# - eigen: OpenCV does not use it, not take any benefit from it.
 OPENCV4_CONF_OPTS += \
 	-DWITH_1394=OFF \
 	-DWITH_CLP=OFF \
-	-DWITH_EIGEN=OFF \
 	-DWITH_GDAL=OFF \
 	-DWITH_GPHOTO2=OFF \
 	-DWITH_GSTREAMER_0_10=OFF \
@@ -284,6 +282,11 @@ OPENCV4_CONF_OPTS += \
 	-DBUILD_opencv_xphoto=$(if $(BR2_PACKAGE_OPENCV4_CONTRIB_LIB_XPHOTO),ON,OFF)
 endif
 
+ifeq ($(BR2_PACKAGE_OPENCV4_CONTRIB_LIB_SFM),y)
+OPENCV4_DEPENDENCIES += eigen glog gflags
+OPENCV4_CONF_OPTS += -DWITH_EIGEN=ON
+endif
+
 ifeq ($(BR2_PACKAGE_OPENCV4_JPEG2000_WITH_JASPER),y)
 OPENCV4_CONF_OPTS += -DWITH_JASPER=ON
 OPENCV4_DEPENDENCIES += jasper