project/grasp_box/perception_function.py

import sys
sys.path.append("/home/kyber/charles/project/grasp_box")
from submodules.SAM6D.pose_estimator import SAM6DPoseEstimator
import numpy as np
import argparse
import json
import yaml
import cv2
import matplotlib.pyplot as plt
import copy
from tqdm import tqdm
import glob
import pickle
import open3d as o3d
import time
import trimesh
import os
from pathlib import Path
from utilis import render_cad_mask, find_matched_points,count_lines_passing_points, get_connected_vertices, intersection_in_xyz_axis
 



class Perception:
    def __init__(self,intrinsic, extrinsic):   
        self.intrinsic_matrix = intrinsic
        self.pose_estimator = SAM6DPoseEstimator(
                config=None,
                self.intrinsic_matrix,
                "/home/kyber/charles/project/grasp_box/submodules/SAM6D/config/base.yaml",
                True
            )
        self.extrinsic = extrinsic
        
    def binary_search_scale(self, rgb,depth, mask, cad_name,debug=False,scale_min=[0.1, 0.15,0.15], scale_max=[0.3,0.18,0.5], threshold=15):
    
        h, w, _ = rgb.shape

        [low_x, low_y, low_z]=scale_min
        [high_x, high_y, high_z]=scale_max
        
        if set(np.unique(mask) ).issubset({0, 255}):
            mask =  (mask // 255).astype(np.uint8)
        
        while low_x<=high_x and low_y <= high_y  and low_z <= high_z:
            
            mid_x = (low_x+high_x)/2
            mid_y = (low_y+high_y)/2
            mid_z = (low_z+high_z)/2
            self.pose_estimator.K = self.intrinsic_matrix
            pose_scores, pred_rot, pred_trans,color_vis,_ = self.pose_estimator.inference(rgb.copy(), mask.copy(), depth.copy(), cad_name, scale= [mid_x, mid_y,mid_z])
        
            pose = np.eye(4)
            pose[:3,3] = pred_trans
            pose[:3,:3] = pred_rot

            mesh_c = self.pose_estimator.cad_cache['tmp']['mesh']
            
            mask_r= render_cad_mask(pose, mesh_c, self.intrinsic_matrix, w, h)
            if debug:
                self.vis_3d(rgb, depth, [pose],self.intrinsic_matrix,mesh_c)
                breakpoint()
            # find nearset vertices, and project get length between vertices
            half_extents = mesh_c.extents / 2.0
            signs = np.array([[x, y, z] for x in [-1, 1]
                                        for y in [-1, 1]
                                        for z in [-1, 1]])

            vertices = signs * half_extents   
            transformed_points = (pose @ np.hstack((vertices, np.ones((vertices.shape[0], 1)))).T).T[:, :3]
            projected_points = (self.intrinsic_matrix @ transformed_points.T).T
            projected_points[:, :2] /= projected_points[:, 2:3]
            
            condition = (projected_points[:, 0] < w) & (projected_points[:, 1] < h)
            filtered_points = projected_points[condition]
            filtered_indices = np.where(condition)[0]

            min_idx_in_filtered = np.argmin(np.linalg.norm(filtered_points)) 
            original_index = filtered_indices[min_idx_in_filtered]
            nearest_index = original_index
            projected_points = projected_points[...,:2].astype(int) 
        
            
            # if two vertices are matched, use this vertex as starting point and find intersection value, then get box extents directly
            gt_contours, _ = cv2.findContours(mask.astype(np.uint8), cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
            gt_cnt = max(gt_contours, key=cv2.contourArea)
            gt_vertex = cv2.approxPolyDP(gt_cnt, epsilon=5, closed=True).reshape(-1,2)
            
            obs_contours, _ = cv2.findContours(mask_r.astype(np.uint8), cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
            obs_cnt = max(obs_contours, key=cv2.contourArea)
            obs_vertex = cv2.approxPolyDP(obs_cnt, epsilon=5, closed=True).reshape(-1,2)
            vis = rgb.copy()
            for u, v in gt_vertex:
                cv2.circle(vis, tuple([u,v]), 5, (255, 0, 0), -1)
            # cv2.imwrite('a.png', vis)
            pair_match = find_matched_points(projected_points, gt_vertex, threshold=50)
       
            # early stopping, if key point matched, stop searching and return scale based on similarity
            for start_pt_index in range(8):
                start_pt =  projected_points[start_pt_index] 
            
                connected = get_connected_vertices(start_pt_index)
                norm_vectors = (projected_points[connected] - start_pt)/ np.linalg.norm(projected_points[connected] - start_pt)
                count = count_lines_passing_points(start_pt, norm_vectors, gt_vertex, threshold=threshold/2, rgb=rgb,vis = False)
                if  count == 3:
                    # lines start from start pt and project to xyz axis, all hits the vertex of gt mask, return the scale
                    arr_gt, arr_obs =  intersection_in_xyz_axis(norm_vectors, start_pt, mask_r, mask, threshold = threshold//2,vis = False, save = False)
                    output_scale = [None] * 3 
                    for axis_index,norm_vector in enumerate(norm_vectors):
                        axis = np.nonzero(signs[connected[axis_index]] - signs[start_pt_index])[0][0]
                        length_gt = arr_gt[axis_index]
                        end_pt_obs = projected_points[connected[axis_index]]

                        if end_pt_obs[0] not in range(0,rgb.shape[1]) or  end_pt_obs[1] not in range(0,rgb.shape[0]):
                            # out of boundary. get pixel distance directly from start and end point. add threshold for tolerance
                            length_obs = np.linalg.norm(end_pt_obs - start_pt).astype(np.uint32) + threshold
                        else:
                            length_obs = arr_obs[axis_index]
                        
                        output_scale[axis] = round(length_gt * mesh_c.extents[axis]/length_obs,2)
                 
                    return output_scale
                
            if len(pair_match) == 0:
                start_pt_index = nearest_index
                
            else:
                pair_match = pair_match[0]
                start_pt_index = pair_match[0]
                
            start_pt = projected_points[start_pt_index]  
            connected = get_connected_vertices(start_pt_index)
            norm_vectors = (projected_points[connected] - start_pt)/ np.linalg.norm(projected_points[connected] - start_pt)
            arr_gt, arr_obs =  intersection_in_xyz_axis(norm_vectors, start_pt, mask_r, mask,threshold,vis = False, save = False)
            
            if abs(arr_gt-arr_obs)[0] <= 20 and abs(arr_gt-arr_obs)[1] <= 20 and abs(arr_gt-arr_obs)[2] <= 20:
                break

            if  abs(high_x-low_x) < 0.1 and abs(high_y-low_y) < 1 and abs(high_z-low_z) < 0.1:
                break

            if (arr_obs[0] - arr_gt[0]) > 0:
                high_x = mid_x
            elif (arr_obs[0] - arr_gt[0]) < 0:
                low_x = mid_x
                
            if (arr_obs[1] - arr_gt[1]) > 0:
                high_y = mid_y
            elif (arr_obs[1] - arr_gt[1]) < 0:
                low_y = mid_y
                
            if (arr_obs[2] - arr_gt[2]) > 0:
                high_z = mid_z
            elif (arr_obs[2] - arr_gt[2]) < 0:
                low_z = mid_z
                
        final_scale = self.pose_estimator.cad_cache['tmp']['mesh'].extents
        return  final_scale
    
    def vis_3d(self, rgb_img, depth_img, pose_list,intrinsic,mesh, mask = None):
        
        vis = o3d.visualization.Visualizer()
        vis.create_window()
  
        if mask is not None:
            rgb_img = rgb_img * mask[:,:,None]
            depth_img = depth_img * mask
        rgb = o3d.geometry.Image(rgb_img) # for uinit16 use
        depth = o3d.geometry.Image((depth_img).astype(np.uint16))
        # mask = (mask > 0).astype(np.uint8) 
        
        rgbd = o3d.geometry.RGBDImage.create_from_color_and_depth(rgb, depth, depth_scale=1000.0)
       
        width = rgb_img.shape[1]
        height = rgb_img.shape[0]
        cx =  int(intrinsic[0,2])
        cy =  int(intrinsic[1,2])
        fx = int(intrinsic[0,0])
        fy = int(intrinsic[1,1])
        
        intri = o3d.camera.PinholeCameraIntrinsic(width=width, height=height, fx=fx, fy=fy, cx=cx, cy=cy) 
        o3d_points = o3d.geometry.PointCloud.create_from_rgbd_image(rgbd, intrinsic=intri)
     
    
        vis.add_geometry(o3d_points)
        # vis.add_geometry(o3d.geometry.TriangleMesh.create_coordinate_frame(1))
        vis.update_geometry(o3d_points)
        
        

        
        
        for i,pose in enumerate(pose_list):

            # mesh = trimesh.load(self.config['cad_database'][f'{box_name[i]}'], force='mesh')
            # mesh_o3d = o3d.io.read_triangle_mesh(f"/media/kyber/Data1/SAM-6D/SAM-6D/Data/Storage_hq_test/model/{box_name}/model.obj",enable_post_processing=True)
            mesh_o3d = o3d.geometry.TriangleMesh()
            mesh_o3d.vertices = o3d.utility.Vector3dVector(mesh.vertices)
            mesh_o3d.triangles = o3d.utility.Vector3iVector(mesh.faces)
            aabb = mesh_o3d.get_axis_aligned_bounding_box()
            extents = aabb.get_extent()
            
            mesh_o3d.transform(pose)
            # print('----------------------------->',extents)
            mesh_o3d.paint_uniform_color([1.0, 0.0, 0.0]) 
            mesh_o3d = o3d.geometry.TriangleMesh(o3d.utility.Vector3dVector(mesh.vertices),  o3d.utility.Vector3iVector(mesh.faces))
            pcd_obj = mesh_o3d.sample_points_uniformly(number_of_points=5000)

           
            pcd_obj_trans = copy.deepcopy(pcd_obj).transform(pose)
            pcd_obj_trans.paint_uniform_color([1.0, 0.0, 0.0]) 
            vis.add_geometry(pcd_obj_trans)
            vis.update_geometry(pcd_obj_trans)
        
        vis.run() 

    def run(self, depth_img, color_img, mask_img,debug = False, gt = False):
       
        color_vis = copy.deepcopy(color_img)

      
        assert len(mask_img.shape) == 2
           
        # vis the GT
        # box = trimesh.load(f'/workspace/PACE/models/obj_{str(obj_id).zfill(6)}.ply', force='mesh')
        # box_rescale = box.copy()
        # box_rescale.vertices = box_rescale.vertices/1000
        # self.vis_3d(color_img, depth_img, [gt_pose],self.intrinsic_matrix,box_rescale)
            
        # use box infer module to infer the scale & pose
        tmp_scores = -1
        output_pose = None
        output_scores = None
        output_scale = None
        
        self.pose_estimator.K = self.intrinsic_matrix
    
    
        assert np.isin(mask_img, [0,1]).all()
        
        for run_idx in range(2):

            scale =  self.binary_search_scale(color_img,depth_img, mask_img*255, self.intrinsic_matrix, 'R306',debug=False,scale_min=[0.1, 0.15,0.15], scale_max=[0.3,0.18,0.5],threshold=10)
            box_ori_scale = self.pose_estimator.cad_cache['R306']['mesh'].extents
            new_scale = np.round(scale/box_ori_scale,2)
            pose_scores, pred_rot, pred_trans,color_vis, _ = self.pose_estimator.inference(color_img.copy(), mask_img*255, depth_img.copy(), 'R306', new_scale)
            pose6d = np.eye(4)
            pose6d[:3,:3] = pred_rot
            pose6d[:3,3] = pred_trans             
            mesh = copy.deepcopy(self.pose_estimator.cad_cache['tmp']['mesh'])
            print('scores:', pose_scores)
            
            if pose_scores is None: 
                continue
            if pose_scores > tmp_scores:
                output_pose = pose6d
                output_scores = pose_scores
                output_scale = mesh.extents
                tmp_scores = pose_scores
            
            self.vis_3d(color_img, depth_img, [pose6d],self.intrinsic_matrix,mesh)
        pose_word = self.extrinsic @ output_pose
        return pose_word, output_scores, output_scale

    
if __name__ == '__main__':

    config = '/home/kyber/charles/project/grasp_box/config/config_perception.yaml'
    
    color_img = cv2.imread('/home/kyber/charles/project/grasp_box/data/000000_rgb.png', cv2.IMREAD_COLOR)
    depth_img = cv2.imread('/home/kyber/charles/project/grasp_box/data/000000_depth.png', -1)  # unit mm    
    mask = ~cv2.imread('/home/kyber/charles/project/grasp_box/data/000000_box-colgate.png', -1)
    mask = mask.astype(bool)
    mask = mask.astype(np.uint8)  
    intrinsic = np.eye(3)
    extrinsic = np.eye(4)
    perception = Perception(intrinsic,extrinsic )
    pose,scores, extents = perception.run(depth_img = depth_img, color_img = color_img,  mask_img=mask)