This is an automated email from the git hooks/post-receive script. Git pushed a commit to branch master in repository ffmpeg.
commit 27ba457b60374787ad82b0d037796631f136ca61 Author: Kacper Michajłow <[email protected]> AuthorDate: Sat Oct 24 04:06:38 2026 +0200 Commit: Kacper Michajłow <[email protected]> CommitDate: Wed Oct 28 19:22:28 2026 +0000 avfilter/colorspace: derive the RGB to XYZ matrix without dividing by y The matrix columns were the primaries scaled to Y = 1, x/y and (1 - x - y)/y, and were then rescaled to fit the white point, so the division by y cancels out. Use the xyz chromaticity vectors directly, which gives the same matrix and also works for a primary with y = 0, such as the Z axis of the CIE 1931 XYZ. Signed-off-by: Kacper Michajłow <[email protected]> --- libavfilter/colorspace.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/libavfilter/colorspace.c b/libavfilter/colorspace.c index f0bd14be18..2655d96363 100644 --- a/libavfilter/colorspace.c +++ b/libavfilter/colorspace.c @@ -86,13 +86,15 @@ void ff_fill_rgb2xyz_table(const AVPrimaryCoefficients *coeffs, double xb = av_q2d(coeffs->b.x), yb = av_q2d(coeffs->b.y); double xw = av_q2d(wp->x), yw = av_q2d(wp->y); - rgb2xyz[0][0] = xr / yr; - rgb2xyz[0][1] = xg / yg; - rgb2xyz[0][2] = xb / yb; - rgb2xyz[1][0] = rgb2xyz[1][1] = rgb2xyz[1][2] = 1.0; - rgb2xyz[2][0] = (1.0 - xr - yr) / yr; - rgb2xyz[2][1] = (1.0 - xg - yg) / yg; - rgb2xyz[2][2] = (1.0 - xb - yb) / yb; + rgb2xyz[0][0] = xr; + rgb2xyz[0][1] = xg; + rgb2xyz[0][2] = xb; + rgb2xyz[1][0] = yr; + rgb2xyz[1][1] = yg; + rgb2xyz[1][2] = yb; + rgb2xyz[2][0] = 1.0 - xr - yr; + rgb2xyz[2][1] = 1.0 - xg - yg; + rgb2xyz[2][2] = 1.0 - xb - yb; ff_matrix_invert_3x3(rgb2xyz, i); zw = 1.0 - xw - yw; sr = i[0][0] * xw + i[0][1] * yw + i[0][2] * zw; -- To stop receiving notification emails like this one, please contact [email protected]. _______________________________________________ ffmpeg-cvslog mailing list -- [email protected] To unsubscribe send an email to [email protected]
