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adding input for feature explore #619

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adding input for feature explore #619

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18 changes: 15 additions & 3 deletions gen_video.py
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Original file line number Diff line number Diff line change
Expand Up @@ -43,7 +43,7 @@ def layout_grid(img, grid_w=None, grid_h=1, float_to_uint8=True, chw_to_hwc=True

#----------------------------------------------------------------------------

def gen_interp_video(G, mp4: str, seeds, shuffle_seed=None, w_frames=60*4, kind='cubic', grid_dims=(1,1), num_keyframes=None, wraps=2, psi=1, device=torch.device('cuda'), **video_kwargs):
def gen_interp_video(G, mp4: str, seeds, shuffle_seed=None, w_frames=60*4, kind='cubic', grid_dims=(1,1), num_keyframes=None, wraps=2, psi=1, device=torch.device('cuda'), feature=None, **video_kwargs):
grid_w = grid_dims[0]
grid_h = grid_dims[1]

Expand All @@ -56,6 +56,12 @@ def gen_interp_video(G, mp4: str, seeds, shuffle_seed=None, w_frames=60*4, kind=
for idx in range(num_keyframes*grid_h*grid_w):
all_seeds[idx] = seeds[idx % len(seeds)]

if len(all_seeds) > 1 and feature is not None:
raise ValueError('Cannot explore a feature for more than a single image')

if len(all_seeds) == 1 and feature is None:
raise ValueError('Must specify a feature if exploring an image')

if shuffle_seed is not None:
rng = np.random.RandomState(seed=shuffle_seed)
rng.shuffle(all_seeds)
Expand All @@ -78,12 +84,16 @@ def gen_interp_video(G, mp4: str, seeds, shuffle_seed=None, w_frames=60*4, kind=

# Render video.
video_out = imageio.get_writer(mp4, mode='I', fps=60, codec='libx264', **video_kwargs)
modifier = 1
for frame_idx in tqdm(range(num_keyframes * w_frames)):
imgs = []
for yi in range(grid_h):
for xi in range(grid_w):
interp = grid[yi][xi]
w = torch.from_numpy(interp(frame_idx / w_frames)).to(device)
if feature is not None:
w[feature] = w[feature] * modifier
modifier + .01
img = G.synthesis(ws=w.unsqueeze(0), noise_mode='const')[0]
imgs.append(img)
video_out.append_data(layout_grid(torch.stack(imgs), grid_w=grid_w, grid_h=grid_h))
Expand Down Expand Up @@ -133,6 +143,7 @@ def parse_tuple(s: Union[str, Tuple[int,int]]) -> Tuple[int, int]:
@click.option('--w-frames', type=int, help='Number of frames to interpolate between latents', default=120)
@click.option('--trunc', 'truncation_psi', type=float, help='Truncation psi', default=1, show_default=True)
@click.option('--output', help='Output .mp4 filename', type=str, required=True, metavar='FILE')
@click.option('--feature', type=int, help='Feature to explore', default=None)
def generate_images(
network_pkl: str,
seeds: List[int],
Expand All @@ -141,7 +152,8 @@ def generate_images(
grid: Tuple[int,int],
num_keyframes: Optional[int],
w_frames: int,
output: str
output: str,
feature: int
):
"""Render a latent vector interpolation video.

Expand Down Expand Up @@ -170,7 +182,7 @@ def generate_images(
with dnnlib.util.open_url(network_pkl) as f:
G = legacy.load_network_pkl(f)['G_ema'].to(device) # type: ignore

gen_interp_video(G=G, mp4=output, bitrate='12M', grid_dims=grid, num_keyframes=num_keyframes, w_frames=w_frames, seeds=seeds, shuffle_seed=shuffle_seed, psi=truncation_psi)
gen_interp_video(G=G, mp4=output, bitrate='12M', grid_dims=grid, num_keyframes=num_keyframes, w_frames=w_frames, seeds=seeds, shuffle_seed=shuffle_seed, psi=truncation_psi, feature=feature)

#----------------------------------------------------------------------------

Expand Down