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uv_synthesize.py
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uv_synthesize.py
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#!/usr/bin/python3
# -*- coding: utf-8 -*-
"""
################################################################################
Copyright (C) 2020 Thomas Meschede a.k.a. yeus
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
################################################################################
@author: Thomas Meschede a.k.a. yeus (yeusblender@gmail.com)
This texture synthesis algorithm takes inspiration from three papers and
combines their papers into a new algorithm:
- Image Quilting for Texture Synthesis and Transfer [Efros, Freeman]
- taking the optimal-patch seam strategy and
- Fast Texture Synthesis using Tree-structured Vector Quantization [Wei, Levoy]
- iterations, non-causal buildup local neighbourhood search
- Real-Time Texture Synthesis by Patch-Based Sampling [Liang et al.]
- building a gaussian image pyramid combined with KD-Trees for
fast searches
and some more inspiration from:
- wfc synthesis algorithm
TODO: optionally in the future:
- Graphcut Textures: Image and Video Synthesis Using Graph Cuts [Kwatra, Schödl]
"""
__author__ = "Thomas Meschede / Thomas Meschede Rose"
__copyright__ = "Copyright (C) 2020 Thomas Rose Meschede"
__license__ = "Proprietary"
__version__ = "1.0"
import random
import numpy as np
import skimage
import skimage.io
import skimage.transform
import threading
#import gc
import math
import functools
sign = functools.partial(math.copysign, 1) # either of these
import logging
logger = logging.getLogger(__name__)
try:
from . import tex_synthesize as ts
except ImportError:
import tex_synthesize as ts
#import tex_synthesize as ts
import pickle
#def norm(x): return np.sqrt(x.dot(x))
def norm(x): return np.sqrt((x*x).sum(-1))
#need to be transposed for correct ultiplcation along axis 1
def normalized(x): return (x.T /norm(x)).T
def calc_angle_vec(u, v):
"""
>>> u = vec((1.0,1.0,0.0))
>>> v = vec((1.0,0.0,0.0))
>>> calc_angle_vec(u,v)*rad
45.00000000000001
>>> u = vec((1.0,0.0,0.0))
>>> v = vec((-1.0,0.0,0.0))
>>> calc_angle_vec(u,v)*rad
180.0
>>> u = vec([-9.38963669e-01, 3.44016319e-01, 1.38777878e-17])
>>> v = vec([-0.93896367, 0.34401632, 0.])
>>> u @ v / (norm(v)*norm(u))
1.0000000000000002
>>> calc_angle_vec(u,v)*rad
0.0
"""
#angle = np.arctan2(norm(np.cross(u,v)), np.dot(u,v))
res = np.sum(u*v) / (norm(u) * norm(v))
t = np.clip(res,-1.0,1.0)
angle = np.arccos(t)
return angle
def tqdm(iterator, *args, **kwargs):
return iterator
GB = 1.0/1024**3 #GB factor
def normalized_synthmap(synthmap, example):
return synthmap/(*example.shape[:2][::-1],1)
@ts.timing
def synthesize_textures_on_uvs(synth_tex=False,
seamless_UVs=False,
msg_queue=None,
stop_event=None,
edge_iterations=0,
*argv, **kwargs):
"""
msg_queue lets the algorithm share intermediate steps
when using threaded calculations (queue.Queue)
"""
target = kwargs['target']
example = kwargs['example']
patch_ratio = kwargs['patch_ratio']
libsize = kwargs.get('libsize',128*128)
face_uvs = kwargs['face_uvs']
islands = kwargs['islands']
edge_infos = kwargs['edge_infos']
seed = kwargs.get('seed_value', 0)
logger.info(f"seed: {seed}")
if msg_queue is None: msg_queue=False
if stop_event is None: stop_event=threading.Event()
#set random seed for algorithm
np.random.seed(seed)
random.seed(seed)
ta_map = None
#TODO: check whether we have "left or right" sided coordinate system
if synth_tex: #generate initial textures
#TODO: make sure all islands are taken into account
logger.info("synthesize uv islands")
res = target.shape[:2]
for island in islands:
island_uvs = [face_uvs[i] for i in island]
island_uvs_px = np.array([uv[...,::-1] * res[:2] for uv in island_uvs])
#get a boundingbox for the entire island
isl_mins = np.array([isl_px.min(axis=0) for isl_px in island_uvs_px])
ymin,xmin = isl_mins.min(axis=0).astype(int)#-(1,1)
ymin,xmin = max(ymin,0),max(xmin,0)
isl_mins = np.array([isl_px.max(axis=0) for isl_px in island_uvs_px])
ymax,xmax = isl_mins.max(axis=0).astype(int)#+(1,1)
ymax,xmax = min(ymax,res[0]),min(xmax,res[1])
#add .5 so that uv coordinates refer to the middle of a pixel
# this has to be done after the "mins" where found
island_uvs_px = [isl + (-0.5,-0.5) for isl in island_uvs_px]
island_mask = np.zeros(target.shape[:2])
for uvs in island_uvs_px:
island_mask[skimage.draw.polygon(*uvs.T)]=1.0
island_mask = island_mask[ymin:ymax,xmin:xmax]>0
target, ta_map = ts.fill_area_with_texture(target, example, ta_map,
patch_ratio=patch_ratio, libsize = libsize,
bounding_box=(ymin,xmin,ymax,xmax),
mask = island_mask)
if msg_queue: msg_queue.put((target,normalized_synthmap(ta_map,example)))
if stop_event.is_set():
logger.info("stopping_thread")
return
if seamless_UVs:
tree_info = None
if ta_map is None:
ta_map = np.ones([*target.shape[:2],3])*-1
for i,(e1,e2) in enumerate(edge_infos):
logger.info(f"making edge seamless: #{i}")
#TODO: add pre-calculated island mask to better find "valid" uv pixels
edge1 = e1[0],face_uvs[e1[1]][:,::-1]*target.shape[:2]
edge2 = e2[0],face_uvs[e2[1]][:,::-1]*target.shape[:2]
target, ta_map, tree_info = ts.make_seamless_edge(edge1, edge2,
target, example, ta_map,
patch_ratio, libsize,
tree_info=tree_info,
debug_level=0)
if msg_queue: msg_queue.put((target,normalized_synthmap(ta_map,example)))
if (edge_iterations != 0) and (i >= edge_iterations): break
if stop_event.is_set():
logger.info("stopping_thread")
return
#debug_image(target2)
#import ipdb; ipdb.set_trace() # BREAKPOINT
return (target,
normalized_synthmap(ta_map,example),
ta_map)
def check_face_orientation(face):
edge_vecs = np.roll(face,1,0)-face
return np.cross(np.roll(edge_vecs,1,0),edge_vecs)
def paint_uv_dots(faces, target):
for f in faces.values():
for v in f[:,::-1]*target.shape[:2]:
#v=v[::-1]
target[skimage.draw.circle(v[0],v[1],2)]=(1,0,0,1)
def reconstruct_synthmap(synthmap,example,mode="coordinates"):
"""
TODO: reconstruct from multiple examples as well (third channel in ta_map)
modes: "coordinates", "normalized"
"""
if mode=="coordinates":
return example[synthmap[:,:,1],synthmap[:,:,0]].copy()
elif mode=='normalized':
synthmap = synthmap * (*example.shape[:2][::-1],1)
synthmap = synthmap.astype(int)
return example[synthmap[:,:,1],synthmap[:,:,0]].copy()
if __name__=="__main__":
logging.basicConfig(level=logging.INFO)
logger.setLevel(logging.INFO)
logging.getLogger('tex_synthesize').setLevel(logging.INFO)
#logging.get
with open('uv_test_island.pickle', 'rb') as handle:
uv_info = pickle.load(handle)
#skimage.io.imshow_collection([uv_info["target"],uv_info["example"]])
target=uv_info['target']
example=uv_info['example']
#skimage.io.imshow_collection([uv_info['target']])
#skimage.io.imshow_collection([example])
#paint_uv_dots(uv_info['face_uvs'],target)
ta, ta_map1, ta_map2 = synthesize_textures_on_uvs(synth_tex=False,
seamless_UVs=True,
edge_iterations=0,
**uv_info)
logger.info("finished test!")
skimage.io.imshow_collection([target, ta_map1, ta_map2])
skimage.io.imsave("test.png",ta_map1)
ta_map_recon = ta_map1*(*example.shape[:2],1)
((ta_map_recon-ta_map2)**2).sum() #test the rounding-error (its pretty good)
ta_map = ta_map2.astype(int)
conv = reconstruct_synthmap(ta_map1,example, mode="normalized")
skimage.io.imshow_collection([ta,conv, ((ta-conv)**2)[...,:3]])
mask = np.all(ta_map1[:,:,:2]>0,axis=2)
edge_seams = ts.copy_img(ta_map1.copy(),conv[:,:,:3],pos=(0,0),mask=mask)
skimage.io.imshow_collection([target,ta, edge_seams])
#uv_info['edge_infos'][0]
#faces = uv_info['island_uvs']
#[check_face_orientation(f) for f in faces]