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pub fn f( bytes_ans: &mut [u8], bytes_gray: &[u8], bytes_mean: &[u8], bytes_std: &[u8], bin_k_f32: f32, swatch_begin_level: u8, swatch_end_level: u8, inverse_std_max_f32: f32, ) { let min_i = 0; for i in 0..bytes_ans.len() { unsafe { let pix_ans = bytes_ans.get_unchecked_mut(i); let pix_gray_wbbf = bytes_gray.get_unchecked(i); let pix_mean = bytes_mean.get_unchecked(i); let pix_std = bytes_std.get_unchecked(i); let im_mean_minus_thsurf_32f: f32 = bin_k_f32 * (1.0 - *pix_std as f32 * inverse_std_max_f32) * (*pix_mean as f32 - min_i as f32); let divisor = im_mean_minus_thsurf_32f as u8; *pix_ans = ((pix_mean.saturating_sub(*pix_gray_wbbf)) / (1 + divisor)) .min(swatch_end_level as u8) .saturating_sub(swatch_begin_level as u8); } } }
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