""" Author: Soubhik Sanyal Copyright (c) 2019, Soubhik Sanyal All rights reserved. Max-Planck-Gesellschaft zur Foerderung der Wissenschaften e.V. (MPG) is holder of all proprietary rights on this computer program. You can only use this computer program if you have closed a license agreement with MPG or you get the right to use the computer program from someone who is authorized to grant you that right. Any use of the computer program without a valid license is prohibited and liable to prosecution. Copyright 2019 Max-Planck-Gesellschaft zur Foerderung der Wissenschaften e.V. (MPG). acting on behalf of its Max Planck Institute for Intelligent Systems and the Max Planck Institute for Biological Cybernetics. All rights reserved. More information about RingNet is available at https://ringnet.is.tue.mpg.de. based on github.com/akanazawa/hmr """ # Renders mesh using OpenDr for visualization. from __future__ import absolute_import from __future__ import division from __future__ import print_function import numpy as np import cv2 from opendr.camera import ProjectPoints from opendr.renderer import ColoredRenderer from opendr.lighting import LambertianPointLight colors = { # colorbline/print/copy safe: 'light_blue': [0.65098039, 0.74117647, 0.85882353], 'light_pink': [.9, .7, .7], # This is used to do no-3d } class SMPLRenderer(object): def __init__(self, img_size=256, flength=500., faces=None): self.faces = faces self.w = img_size self.h = img_size self.flength = flength def __call__(self, verts, cam=None, img=None, do_alpha=False, far=None, near=None, color_id=0, img_size=None): """ cam is 3D [f, px, py] """ if img is not None: h, w = img.shape[:2] elif img_size is not None: h = img_size[0] w = img_size[1] else: h = self.h w = self.w if cam is None: cam = [self.flength, w / 2., h / 2.] use_cam = ProjectPoints( f=cam[0] * np.ones(2), rt=np.zeros(3), t=np.zeros(3), k=np.zeros(5), c=cam[1:3]) if near is None: near = np.maximum(np.min(verts[:, 2]) - 25, 0.1) if far is None: far = np.maximum(np.max(verts[:, 2]) + 25, 25) imtmp = render_model( verts, self.faces, w, h, use_cam, do_alpha=do_alpha, img=img, far=far, near=near, color_id=color_id) return (imtmp * 255).astype('uint8') def rotated(self, verts, deg, cam=None, axis='y', img=None, do_alpha=True, far=None, near=None, color_id=0, img_size=None): import math if axis == 'y': around = cv2.Rodrigues(np.array([0, math.radians(deg), 0]))[0] elif axis == 'x': around = cv2.Rodrigues(np.array([math.radians(deg), 0, 0]))[0] else: around = cv2.Rodrigues(np.array([0, 0, math.radians(deg)]))[0] center = verts.mean(axis=0) new_v = np.dot((verts - center), around) + center return self.__call__( new_v, cam, img=img, do_alpha=do_alpha, far=far, near=near, img_size=img_size, color_id=color_id) def _create_renderer(w=640, h=480, rt=np.zeros(3), t=np.zeros(3), f=None, c=None, k=None, near=.5, far=10.): f = np.array([w, w]) / 2. if f is None else f c = np.array([w, h]) / 2. if c is None else c k = np.zeros(5) if k is None else k rn = ColoredRenderer() rn.camera = ProjectPoints(rt=rt, t=t, f=f, c=c, k=k) rn.frustum = {'near': near, 'far': far, 'height': h, 'width': w} return rn def _rotateY(points, angle): """Rotate the points by a specified angle.""" ry = np.array([[np.cos(angle), 0., np.sin(angle)], [0., 1., 0.], [-np.sin(angle), 0., np.cos(angle)]]) return np.dot(points, ry) def simple_renderer(rn, verts, faces, yrot=np.radians(120), color=colors['light_pink']): # Rendered model color rn.set(v=verts, f=faces, vc=color, bgcolor=np.ones(3)) albedo = rn.vc # Construct Back Light (on back right corner) rn.vc = LambertianPointLight( f=rn.f, v=rn.v, num_verts=len(rn.v), light_pos=_rotateY(np.array([-200, -100, -100]), yrot), vc=albedo, light_color=np.array([1, 1, 1])) # Construct Left Light rn.vc += LambertianPointLight( f=rn.f, v=rn.v, num_verts=len(rn.v), light_pos=_rotateY(np.array([800, 10, 300]), yrot), vc=albedo, light_color=np.array([1, 1, 1])) # Construct Right Light rn.vc += LambertianPointLight( f=rn.f, v=rn.v, num_verts=len(rn.v), light_pos=_rotateY(np.array([-500, 500, 1000]), yrot), vc=albedo, light_color=np.array([.7, .7, .7])) return rn.r def get_alpha(imtmp, bgval=1.): h, w = imtmp.shape[:2] alpha = (~np.all(imtmp == bgval, axis=2)).astype(imtmp.dtype) b_channel, g_channel, r_channel = cv2.split(imtmp) im_RGBA = cv2.merge((b_channel, g_channel, r_channel, alpha.astype( imtmp.dtype))) return im_RGBA def append_alpha(imtmp): alpha = np.ones_like(imtmp[:, :, 0]).astype(imtmp.dtype) if np.issubdtype(imtmp.dtype, np.uint8): alpha = alpha * 255 b_channel, g_channel, r_channel = cv2.split(imtmp) im_RGBA = cv2.merge((b_channel, g_channel, r_channel, alpha)) return im_RGBA def render_model(verts, faces, w, h, cam, near=0.5, far=25, img=None, do_alpha=False, color_id=None): rn = _create_renderer( w=w, h=h, near=near, far=far, rt=cam.rt, t=cam.t, f=cam.f, c=cam.c) # Uses img as background, otherwise white background. if img is not None: rn.background_image = img / 255. if img.max() > 1 else img if color_id is None: color = colors['light_blue'] else: color_list = colors.values() color = color_list[color_id % len(color_list)] imtmp = simple_renderer(rn, verts, faces, color=color) # If white bg, make transparent. if img is None and do_alpha: imtmp = get_alpha(imtmp) elif img is not None and do_alpha: imtmp = append_alpha(imtmp) return imtmp # ------------------------------ def get_original(proc_param, verts, cam, img_size): img_size = proc_param['img_size'] undo_scale = 1. / np.array(proc_param['scale']) cam_s = cam[0] cam_pos = cam[1:] principal_pt = np.array([img_size, img_size]) / 2. flength = 50000.0 #500. tz = flength / (0.5 * img_size * cam_s) trans = np.hstack([cam_pos, tz]) vert_shifted = verts + trans start_pt = proc_param['start_pt'] - 0.5 * img_size final_principal_pt = (principal_pt + start_pt) * undo_scale cam_for_render = np.hstack( [np.mean(flength * undo_scale), final_principal_pt]) # This is in padded image. # kp_original = (joints + proc_param['start_pt']) * undo_scale # Subtract padding from joints. margin = int(img_size / 2) # kp_original = (joints + proc_param['start_pt'] - margin) * undo_scale return cam_for_render, vert_shifted, #kp_original