how to renderer and image with exactly the same color as texture image?

[xhuan8]

I try to render an 3D model with texture image, but the result image is much darker, is it possible to make it the same as input texture image?

def test_render_pytorch3D1():
    verts, faces_idx, aux = load_obj("Data/cow.obj")
    faces = faces_idx.verts_idx
    verts_uvs = aux.verts_uvs[None, ...].to(device)  # (1, V, 2)
    faces_uvs = faces_idx.textures_idx[None, ...].to(device)  # (1, F, 3)

    texture_image = cv2.imread('Data/cow_texture.png')
    texture_image_batch = texture_image[None, ...]  # (1, H, W, 3)
    texture_image_batch = torch.from_numpy(texture_image_batch).float().to(device) / 255
    textures = TexturesUV(verts_uvs=verts_uvs, faces_uvs=faces_uvs, maps=texture_image_batch)

    #verts_rgb = torch.ones_like(verts)[None] # (1, V, 3)
    #textures = TexturesVertex(verts_features=verts_rgb.to(device))

    print(verts.shape)
    print(faces.shape)
    print(texture_image_batch.shape)

    mesh = Meshes(
        verts=[verts.to(device)],
        faces=[faces.to(device)],
        textures=textures
        )

    R, T = look_at_view_transform(2.7, 0, 180) 
    cameras = FoVPerspectiveCameras(device=device, R=R, T=T)

    raster_settings = RasterizationSettings(
        image_size=512, 
        blur_radius=0.0, 
        faces_per_pixel=1, 
        )
    lights = PointLights(device=device, location=[[0.0, 0.0, -3.0]])

    renderer = MeshRenderer(
        rasterizer=MeshRasterizer(
            cameras=cameras, 
            raster_settings=raster_settings
        ),
        shader=SoftPhongShader(
            device=device, 
            cameras=cameras,
            lights=lights
        )
    )

    images = renderer(mesh)
    images = images[0, ..., :3].detach().cpu().numpy()
    cv2.imwrite('Data/2.png', images * 255)

[bottler]

closing as duplicate of #1670.