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spacedandy-agents-simplex
5cae929f0c
A phrase that is exactly the text now wins over one that only contains it (the alert's Search button under "Search in Directory?", the Directory header next to the Search in Directory row), and words are compared by their joined characters, so OCR splitting "#ci_group" still matches. New commands: ui find prints a text's centre and box; ui avatar measures the profile image left of a list row's name, saves that area, and with a colour checks that it dominates.
46 lines
1.7 KiB
Python
Executable File
46 lines
1.7 KiB
Python
Executable File
#!/usr/bin/env python3
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# Prints how many pixels of an image stand out from its background (its most common colour), and their mean colour.
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# With a colour, fails unless enough pixels stand out and that channel of their mean exceeds the other two by a margin.
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# Usage: screen-colour.py <image.ppm> [red|green|blue]
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import re
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import sys
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from collections import Counter
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# A pixel stands out when one of its channels differs from the background's by more than this.
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DIFFERENCE = 48
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# A 42 px profile image has about 1200 pixels; fewer than this standing out is no image.
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MIN_PIXELS = 300
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DOMINANCE = 50
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CHANNELS = {"red": 0, "green": 1, "blue": 2}
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def read_ppm(path):
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with open(path, "rb") as f:
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data = f.read()
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header = re.match(rb"P6\s+(\d+)\s+(\d+)\s+(\d+)\s", data)
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if int(header[3]) != 255:
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sys.exit(f"{path}: expected 8-bit samples, got maximum {int(header[3])}")
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samples = data[header.end():]
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return [tuple(samples[i:i + 3]) for i in range(0, len(samples) - 2, 3)]
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def main():
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pixels = read_ppm(sys.argv[1])
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colour = sys.argv[2] if len(sys.argv) > 2 else None
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if colour is not None and colour not in CHANNELS:
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sys.exit(f"unknown colour: {colour}")
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background = Counter(pixels).most_common(1)[0][0]
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standing_out = [p for p in pixels if max(abs(a - b) for a, b in zip(p, background)) > DIFFERENCE]
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n = len(standing_out)
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mean = [round(sum(p[c] for p in standing_out) / n) if n else 0 for c in range(3)]
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print(f"{n} px, mean {mean[0]},{mean[1]},{mean[2]}")
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if colour is not None:
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c = CHANNELS[colour]
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if n < MIN_PIXELS or any(mean[c] - mean[o] < DOMINANCE for o in range(3) if o != c):
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sys.exit(1)
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main()
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