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Clean up

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kris 2021-11-16 12:24:43 +00:00
parent 10c829906b
commit 7ad560247b
1 changed files with 25 additions and 63 deletions
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88
convert.py
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@ -1,20 +1,13 @@
"""Image converter to Apple II Double Hi-Res format."""
import argparse
import array
import os.path
import time
import collections
import random
import pygame
import warnings
import colour
from PIL import Image
import colour
import numpy as np
from pyclustering.cluster.kmedians import kmedians
from pyclustering.cluster.kmeans import kmeans
from pyclustering.utils.metric import distance_metric, type_metric
from pyclustering.cluster.center_initializer import kmeans_plusplus_initializer
import pygame
from sklearn import cluster
import dither as dither_pyx
@ -31,7 +24,7 @@ import screen as screen_py
class ClusterPalette:
def __init__(self, image: Image):
self._colours_cam = self._image_colours_cam(image)
self._best_palette_distances = {i: (1e9, None) for i in range(16)}
self._best_palette_distances = [1e9] * 16
self._iterations = 0
self._palettes_cam = np.empty((16, 16, 3), dtype=np.float32)
self._palettes_rgb = np.empty((16, 16, 3), dtype=np.float32)
@ -47,9 +40,9 @@ class ClusterPalette:
def _fit_global_palette(self):
"""Compute a 16-colour palette for the entire image to use as
starting point for the sub-palettes. This should help when the image
has large blocks of colour since the sub-palettes will tend to pick the same coloursx."""
has large blocks of colour since the sub-palettes will tend to pick the
same colours."""
clusters = cluster.MiniBatchKMeans(n_clusters=16, max_iter=10000)
# tol=0.0000000001, algorithm="elkan")
clusters.fit_predict(self._colours_cam)
return clusters.cluster_centers_
@ -58,65 +51,33 @@ class ClusterPalette:
print("Iteration %d" % self._iterations)
for palette_idx in range(16):
# i=5: 3 * (200/16) : 7 * (200/16)
# print("Fitting palette %d" % palette_idx)
p_lower2 = max(palette_idx - 1.5, 0)
p_lower1 = max(palette_idx - 1, 0)
p_lower0 = palette_idx
p_upper0 = max(palette_idx + 1, 16)
p_upper1 = max(palette_idx + 2, 16)
p_upper2 = min(palette_idx + 2.5, 16)
# TODO: weight +/-1 and 0 bands higher
p_lower = max(palette_idx - 1.5, 0)
p_upper = min(palette_idx + 2.5, 16)
# TODO: dynamically tune palette cuts
palette_pixels = np.concatenate(
[
self._colours_cam[
int(p_lower2 * (200 / 16)) * 320:int(p_upper2 * (
200 / 16)) * 320, :],
# self._colours_cam[
# int(p_lower1 * (200 / 16)) * 320:int(p_upper1 * (
# 200 / 16)) * 320, :],
# self._colours_cam[
# int(p_lower0 * (200 / 16)) * 320:int(p_upper0 * (
# 200 / 16)) * 320, :],
], axis=0)
palette_pixels = self._colours_cam[
int(p_lower * (200 / 16)) * 320:int(p_upper * (
200 / 16)) * 320, :]
best_wce, best_medians = self._best_palette_distances[palette_idx]
# if palette_idx == 0:
# initial_centers = kmeans_plusplus_initializer(
# palette_pixels, 16).initialize()
# else:
# initial_centers = kmedians_instance.get_medians()
# kmedians_instance = kmeans(
# palette_pixels, initial_centers, tolerance=0.0000000001,
# itermax=100,
# metric=distance_metric(type_metric.EUCLIDEAN_SQUARE))
# kmedians_instance.process()
best_wce = self._best_palette_distances[palette_idx]
# TODO: tolerance
clusters = cluster.MiniBatchKMeans(
n_clusters=16, max_iter=10000, init=self._global_palette,
n_init=1)
# tol=0.0000000001, algorithm="elkan")
clusters.fit_predict(palette_pixels)
# if kmedians_instance.get_total_wce() < best_wce:
# best_wce = kmedians_instance.get_total_wce()
# best_medians = kmedians_instance
if clusters.inertia_ < (best_wce * 0.99):
best_wce = clusters.inertia_
print("Improved palette %d: %f" % (palette_idx, best_wce))
# self._palettes_cam[palette_idx, :, :] = np.array(
# best_medians.get_centers()).astype(np.float32)
# TODO: sentinel
if best_wce < 1e9:
print("Improved palette %d (+%f%%)" % (
palette_idx, best_wce / clusters.inertia_))
self._palettes_cam[palette_idx, :, :] = np.array(
clusters.cluster_centers_).astype(np.float32)
self._best_palette_distances[palette_idx] = (
best_wce, best_medians)
best_wce = clusters.inertia_
self._best_palette_distances[palette_idx] = best_wce
with colour.utilities.suppress_warnings(
colour_usage_warnings=True):
# Suppress divide by zero warning,
# https://github.com/colour-science/colour/issues/900
with colour.utilities.suppress_warnings(python_warnings=True):
palette_rgb = colour.convert(
self._palettes_cam[palette_idx], "CAM16UCS", "RGB")
# SHR colour palette only uses 4-bit values
@ -187,20 +148,21 @@ def main():
gamma=args.gamma_correct, srgb_output=True)).astype(
np.float32) / 255
# TODO: flags
penalty = 10 # 1e9
iterations = 50
pygame.init()
canvas = pygame.display.set_mode((640, 400))
# TODO: for some reason I need to execute this twice - the first time
# the window is created and immediately destroyed
pygame.display.set_mode((640, 400))
canvas = pygame.display.set_mode((640, 400))
canvas.fill((0, 0, 0))
pygame.display.flip()
# print("Foo")
cluster_palette = ClusterPalette(rgb)
for iteration in range(iterations):
palettes_cam, palettes_rgb = cluster_palette.iterate()
# print((palettes_rgb*255).astype(np.uint8))
for i in range(16):
screen.set_palette(i, (np.round(palettes_rgb[i, :, :] * 15)).astype(
np.uint8))