#!/usr/bin/env python
-import math
+# Any copyright is dedicated to the Public Domain.
+# https://creativecommons.org/publicdomain/zero/1.0/
+
+# Written by Francois Fleuret <francois@fleuret.org>
+
+import math, sys, tqdm
import torch, torchvision
from torch import nn
from torch.nn import functional as F
-import cairo
-
-
-class Box:
- def __init__(self, x, y, w, h, r, g, b):
- self.x = x
- self.y = y
- self.w = w
- self.h = h
- self.r = r
- self.g = g
- self.b = b
-
- def collision(self, scene):
- for c in scene:
- if (
- self is not c
- and max(self.x, c.x) <= min(self.x + self.w, c.x + c.w)
- and max(self.y, c.y) <= min(self.y + self.h, c.y + c.h)
- ):
- return True
- return False
-
-
-def scene2tensor(xh, yh, scene, size=512):
- width, height = size, size
- pixel_map = torch.ByteTensor(width, height, 4).fill_(255)
- data = pixel_map.numpy()
- surface = cairo.ImageSurface.create_for_data(
- data, cairo.FORMAT_ARGB32, width, height
- )
- ctx = cairo.Context(surface)
- ctx.set_fill_rule(cairo.FILL_RULE_EVEN_ODD)
-
- for b in scene:
- ctx.move_to(b.x * size, b.y * size)
- ctx.rel_line_to(b.w * size, 0)
- ctx.rel_line_to(0, b.h * size)
- ctx.rel_line_to(-b.w * size, 0)
- ctx.close_path()
- ctx.set_source_rgba(b.r, b.g, b.b, 1.0)
- ctx.fill_preserve()
- ctx.set_source_rgba(0, 0, 0, 1.0)
- ctx.stroke()
-
- hs = size * 0.05
- ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0)
- ctx.move_to(xh * size - hs / 2, yh * size - hs / 2)
- ctx.rel_line_to(hs, 0)
- ctx.rel_line_to(0, hs)
- ctx.rel_line_to(-hs, 0)
- ctx.close_path()
- ctx.fill()
-
- return pixel_map[None, :, :, :3].flip(-1).permute(0, 3, 1, 2).float() / 255
-
-
-def random_scene():
- scene = []
- colors = [
- (1.00, 0.00, 0.00),
- (0.00, 1.00, 0.00),
- (0.00, 0.00, 1.00),
- (1.00, 1.00, 0.00),
- (0.75, 0.75, 0.75),
- ]
+######################################################################
- for k in range(10):
- wh = torch.rand(2) * 0.2 + 0.2
- xy = torch.rand(2) * (1 - wh)
- c = colors[torch.randint(len(colors), (1,))]
- b = Box(
- xy[0].item(), xy[1].item(), wh[0].item(), wh[1].item(), c[0], c[1], c[2]
- )
- if not b.collision(scene):
- scene.append(b)
-
- return scene
-
-
-def sequence(length=10):
- delta = 0.1
- effects = [
- (False, 0, 0),
- (False, delta, 0),
- (False, 0, delta),
- (False, -delta, 0),
- (False, 0, -delta),
- (True, delta, 0),
- (True, 0, delta),
- (True, -delta, 0),
- (True, 0, -delta),
+
+colors = torch.tensor(
+ [
+ [255, 255, 255],
+ [0, 0, 0],
+ [255, 0, 0],
+ [0, 128, 0],
+ [0, 0, 255],
+ [255, 255, 0],
+ [192, 192, 192],
]
+)
+
+token2char = "_X01234>"
+
+
+def generate(
+ nb,
+ height,
+ width,
+ obj_length=6,
+ mask_height=3,
+ mask_width=3,
+ nb_obj=3,
+):
+ intact = torch.zeros(nb, height, width, dtype=torch.int64)
+ n = torch.arange(intact.size(0))
+
+ for n in range(nb):
+ for c in torch.randperm(colors.size(0) - 2)[:nb_obj] + 2:
+ z = intact[n].flatten()
+ m = (torch.rand(z.size()) * (z == 0)).argmax(dim=0)
+ i, j = m // width, m % width
+ vm = torch.randint(4, (1,))[0]
+ vi, vj = (vm // 2) * (2 * (vm % 2) - 1), (1 - vm // 2) * (2 * (vm % 2) - 1)
+ for l in range(obj_length):
+ intact[n, i, j] = c
+ i += vi
+ j += vj
+ if i < 0 or i >= height or j < 0 or j >= width or intact[n, i, j] != 0:
+ i -= vi
+ j -= vj
+ vi, vj = -vj, vi
+ i += vi
+ j += vj
+ if (
+ i < 0
+ or i >= height
+ or j < 0
+ or j >= width
+ or intact[n, i, j] != 0
+ ):
+ break
+
+ masked = intact.clone()
+
+ for n in range(nb):
+ i = torch.randint(height - mask_height + 1, (1,))[0]
+ j = torch.randint(width - mask_width + 1, (1,))[0]
+ masked[n, i : i + mask_height, j : j + mask_width] = 1
+
+ return torch.cat(
+ [
+ masked.flatten(1),
+ torch.full((masked.size(0), 1), len(colors)),
+ intact.flatten(1),
+ ],
+ dim=1,
+ )
+
+
+def sample2img(seq, height, width):
+ intact = seq[:, : height * width].reshape(-1, height, width)
+ masked = seq[:, height * width + 1 :].reshape(-1, height, width)
+ img_intact, img_masked = colors[intact], colors[masked]
+
+ img = torch.cat(
+ [
+ img_intact,
+ torch.full(
+ (img_intact.size(0), img_intact.size(1), 1, img_intact.size(3)), 1
+ ),
+ img_masked,
+ ],
+ dim=2,
+ )
+
+ return img.permute(0, 3, 1, 2)
+
+
+def seq2str(seq):
+ result = []
+ for s in seq:
+ result.append("".join([token2char[v] for v in s]))
+ return result
- while True:
- scene = random_scene()
- xh, yh = tuple(x.item() for x in torch.rand(2))
-
- frame_start = scene2tensor(xh, yh, scene)
-
- actions = torch.randint(len(effects), (length,))
- change = False
-
- for a in actions:
- g, dx, dy = effects[a]
- if g:
- for b in scene:
- if b.x <= xh and b.x + b.w >= xh and b.y <= yh and b.y + b.h >= yh:
- x, y = b.x, b.y
- b.x += dx
- b.y += dy
- if (
- b.x < 0
- or b.y < 0
- or b.x + b.w > 1
- or b.y + b.h > 1
- or b.collision(scene)
- ):
- b.x, b.y = x, y
- else:
- xh += dx
- yh += dy
- change = True
- else:
- x, y = xh, yh
- xh += dx
- yh += dy
- if xh < 0 or xh > 1 or yh < 0 or yh > 1:
- xh, yh = x, y
-
- frame_end = scene2tensor(xh, yh, scene)
- if change:
- break
-
- return frame_start, frame_end, actions
+######################################################################
if __name__ == "__main__":
- frame_start, frame_end, actions = sequence()
- torchvision.utils.save_image(frame_start, "world_start.png")
- torchvision.utils.save_image(frame_end, "world_end.png")
+ import time
+
+ height, width = 6, 8
+ start_time = time.perf_counter()
+ seq = generate(nb=64, height=height, width=width)
+ delay = time.perf_counter() - start_time
+ print(f"{seq.size(0)/delay:02f} samples/s")
+
+ print(seq2str(seq[:4]))
+
+ img = sample2img(seq, height, width)
+ print(img.size())
+
+ torchvision.utils.save_image(img.float() / 255.0, "world.png", nrow=8, padding=2)
projects / culture.git / blobdiff