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compare: roz:71cca0589e427417c0e7cbb4043615f70b16861b
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roz:main

3 Commits
64e693fe4a ... 71cca0589e

Author SHA1 Message Date
Roz K
71cca0589e cleanup 2025-09-23 05:46:58 +02:00
Roz K
67b60b0e69 cleanup 2025-09-23 05:46:38 +02:00
Roz K
79b66d47ee black border color 2025-09-23 05:46:21 +02:00
2 changed files with 23 additions and 22 deletions
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10
gopro_8:7/unfish_gopro_8:7.glsl
View File

@ -68,7 +68,7 @@ vec3 sample_texture(const in vec2 coord) {
vec2 y_coord = texture_center + rectilinear * sensor_to_texture; vec2 y_coord = texture_center + rectilinear * sensor_to_texture;
#ifdef debug_borders #ifdef debug_borders
if (y_coord.x < 0.0 || y_coord.y < 0.0 || y_coord.x > myResolution.x || y_coord.y > myResolution.y) { if (y_coord.x < 0.0 || y_coord.y < 0.0 || y_coord.x > myResolution.x || y_coord.y > myResolution.y) {
return vec3(1.0); return vec3(16.0 / 255.0, 0.5, 0.5);
} }
#endif #endif
vec2 uv_coord = y_coord * 0.5; vec2 uv_coord = y_coord * 0.5;
@ -99,15 +99,15 @@ vec3 decode_pixel(const in vec3 pixel) {
return vec3(l, color.yz); return vec3(l, color.yz);
} }
vec3 encode_pixel(const in vec3 color) { vec3 encode_color(const in vec3 color) {
float y = (color.x < 0.018) ? (color.x * 4.5) : (pow(color.x, 0.45) * 1.099 - 0.099); float y = (color.x < 0.018) ? (color.x * 4.5) : (pow(color.x, 0.45) * 1.099 - 0.099);
return (vec3(y, color.yz) + yuv_center) * yuv_range + yuv_min; return (vec3(y, color.yz) + yuv_center) * yuv_range + yuv_min;
} }
#else #else
#define decode_pixel(_color) _color #define decode_pixel(_pixel) _pixel
#define encode_pixel(_color) _color #define encode_color(_color) _color
#endif // non_linear_decoding #endif // non_linear_decoding
@ -121,5 +121,5 @@ void main() {
color += decode_pixel(sample_texture(coord + offset)); color += decode_pixel(sample_texture(coord + offset));
} }
} }
gl_FragColor = vec4(encode_pixel(color * subsampling_scale), 1.0); gl_FragColor = vec4(encode_color(color * subsampling_scale), 1.0);
} }

35
gopro_8:7/unfish_gopro_8:7.py
View File

@ -57,7 +57,7 @@ print("gopro fov : horizontal = %7.3f, vertical = %7.3f, diagonal = %7.3f (deg
gopro_fov_vertical, gopro_fov_vertical,
gopro_fov_diagonal)) gopro_fov_diagonal))
print("\n--- rectilinear re-projection, preserving vertical fov ---\n") print("\n--- rectilinear re-projection ---\n")
rectilinear_focal_length = lambda radius: radius * math.tan(math.radians(90.0 - equidistant_angle(radius))) rectilinear_focal_length = lambda radius: radius * math.tan(math.radians(90.0 - equidistant_angle(radius)))
@ -73,14 +73,14 @@ print("linear focal: horizontal = %7.3f, vertical = %7.3f, diagonal = %7.3f (mm)
rectilinear_radius = lambda angle, focal_length: focal_length * math.tan(math.radians(angle)) rectilinear_radius = lambda angle, focal_length: focal_length * math.tan(math.radians(angle))
rectilinear_angle = lambda radius, focal_length: math.degrees(math.atan(radius / focal_length)) rectilinear_angle = lambda radius, focal_length: math.degrees(math.atan(radius / focal_length))
preserved_fov_horizontal = 2.0 * rectilinear_angle(gopro_radius_horizontal, rectilinear_focal_length_vertical) rectilinear_fov_horizontal = 2.0 * rectilinear_angle(gopro_radius_horizontal, rectilinear_focal_length_vertical)
preserved_fov_vertical = 2.0 * rectilinear_angle(gopro_radius_vertical, rectilinear_focal_length_vertical) rectilinear_fov_vertical = 2.0 * rectilinear_angle(gopro_radius_vertical, rectilinear_focal_length_vertical)
preserved_fov_diagonal = 2.0 * rectilinear_angle(gopro_radius_diagonal, rectilinear_focal_length_vertical) rectilinear_fov_diagonal = 2.0 * rectilinear_angle(gopro_radius_diagonal, rectilinear_focal_length_vertical)
print("linear fov : horizontal = %7.3f, vertical = %7.3f, diagonal = %7.3f (deg)" % ( print("linear fov : horizontal = %7.3f, vertical = %7.3f, diagonal = %7.3f (deg)" % (
preserved_fov_horizontal, rectilinear_fov_horizontal,
preserved_fov_vertical, rectilinear_fov_vertical,
preserved_fov_diagonal)) rectilinear_fov_diagonal))
print("\n--- shader parameters ---\n") print("\n--- shader parameters ---\n")
@ -93,13 +93,14 @@ const float rectilinear_focal_length = %.6f;""" % (
rectilinear_focal_length_vertical) rectilinear_focal_length_vertical)
) )
print("\n--- filter parameters 4K ---\n") # print("\n--- filter parameters 4K ---\n")
#
width_scale = rectilinear_focal_length_vertical / rectilinear_focal_length_horizontal # width_scale = rectilinear_focal_length_vertical / rectilinear_focal_length_horizontal
#
output_height = 2160 # output_height = 2160
output_width = int(round((output_height / 7.0) * 8.0 * width_scale)) # output_width = int(round((output_height / gopro_array_vertical) * gopro_array_horizontal * width_scale))
#
print("resize: width = %d, height = %d" % ( # print("resize: width = %d, height = %d, ratio = %f" % (
output_width, # output_width,
output_height)) # output_height,
# output_width / output_height))