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assembling: Fix assembling of last frame in reverse mode

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The last image is always misplaced because the sign of the delta
vector isn't corrected.

This could result in false positives and verification failing.

https://bugs.freedesktop.org/show_bug.cgi?id=105027
This commit is contained in:
Timur Celik 2018-02-10 01:29:04 +01:00 committed by Bastien Nocera
parent 37bb59df13
commit 0215483fb3
1 changed files with 2 additions and 2 deletions
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4
libfprint/assembling.c
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@ -132,8 +132,8 @@ static unsigned int do_movement_estimation(struct fpi_frame_asmbl_ctx *ctx,
if (reverse) {
find_overlap(ctx, prev_stripe, cur_stripe, &min_error);
prev_stripe->delta_y = -prev_stripe->delta_y;
prev_stripe->delta_x = -prev_stripe->delta_x;
cur_stripe->delta_y = -cur_stripe->delta_y;
cur_stripe->delta_x = -cur_stripe->delta_x;
}
else
find_overlap(ctx, cur_stripe, prev_stripe, &min_error);