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add a script to compute parameters

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Roz K 2025-06-15 16:52:15 +02:00
parent c8a23e2e2c
commit e560ba8b67
Signed by: roz
GPG Key ID: 51FBF4E483E1C822
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compute_gopro_8-7_wide_hypersmooth-off.py Normal file
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# RozK
# Computes fisheye removal parameters for GoPro 11+, 8:7 ratio, without hypersmooth,
# keeping the vertical FOV and widening the frame to preserve the diagonal FOV
# https://community.gopro.com/s/article/HERO11-Black-Mini-Digital-Lenses-FOV-Information?language=fr
import math
frame_width = 8
frame_height = 7
input_vertical_fov = 108.0
input_diagonal_fov = 156.0
input_vertical_length = math.radians(input_vertical_fov * 0.5)
input_diagonal_length = math.radians(input_diagonal_fov * 0.5)
output_horizontal_length = math.sqrt((input_diagonal_length ** 2) / (input_vertical_length ** 2))
output_diagonal_length = math.hypot(output_horizontal_length, input_vertical_length)
output_diagonal_fov = math.degrees(math.atan(output_diagonal_length)) * 2.0
output_ratio = output_horizontal_length / input_vertical_length
print("Output FOV = %f" % output_diagonal_fov)
print("Output Ratio = %f" % output_ratio)
print("= Resolutions =====================")
def width_rounded_8(height):
width = int(round(height * output_ratio))
return ((width + 4) // 8) * 8
print("HD = %i x 720" % width_rounded_8(720))
print("Full HD = %i x 1080" % width_rounded_8(1080))
print("4K = %i x 2160" % width_rounded_8(2160))