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感觉很需要ncnn::Mat 的resize函数 #62

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ElegantGod opened this issue Jul 28, 2017 · 3 comments
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感觉很需要ncnn::Mat 的resize函数 #62

ElegantGod opened this issue Jul 28, 2017 · 3 comments

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@ElegantGod
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缺少ncnn::Mat resize()函数，发现很不方便，每次使用copy_cut_border()取roi后，还要转pixel形式后再做resize和substract_mean_normalize
不知道是不是我用的不对
@nihui
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nihui commented Aug 1, 2017

在原图上取 roi，然后 Mat::from_pixels_resize

@ElegantGod
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我觉得这样会导致重复的做substract_mean_normalize(mean_vals, norm_vals)，比如做图像金字塔；还有个问题，float和uint8分别作resize，时间大概是几倍的关系呢

@nihui
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nihui commented Aug 23, 2017

613028a
后续会优化下，然后做个 resize layer

@jiefly jiefly mentioned this issue May 13, 2020
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@liuguicen liuguicen mentioned this issue Oct 29, 2021
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@zhu-zhaofei zhu-zhaofei mentioned this issue Dec 19, 2021
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@nihui @ElegantGod