如何在不支持neon的平台上运行口罩检测demo？

[cgoxopx]

main.cpp: 在函数‘void neon_mean_scale(const float*, float*, int, std::vector, std::vector)’中: main.cpp:45:5: 错误：‘float32x4_t’ was not declared in this scope; did you mean ‘float_t’? 45 | float32x4_t vmean0 = vdupq_n_f32(mean[0]); | ^~~~~~~~~~~ | float_t main.cpp:46:16: 错误：expected ‘;’ before ‘vmean1’ 46 | float32x4_t vmean1 = vdupq_n_f32(mean[1]); | ^~~~~~~ | ; main.cpp:47:16: 错误：expected ‘;’ before ‘vmean2’ 47 | float32x4_t vmean2 = vdupq_n_f32(mean[2]); | ^~~~~~~ | ; main.cpp:48:16: 错误：expected ‘;’ before ‘vscale0’ 48 | float32x4_t vscale0 = vdupq_n_f32(scale[0]); | ^~~~~~~~ | ; main.cpp:49:16: 错误：expected ‘;’ before ‘vscale1’ 49 | float32x4_t vscale1 = vdupq_n_f32(scale[1]); | ^~~~~~~~ | ; main.cpp:50:16: 错误：expected ‘;’ before ‘vscale2’ 50 | float32x4_t vscale2 = vdupq_n_f32(scale[2]); | ^~~~~~~~ | ; main.cpp:58:9: 错误：‘float32x4x3_t’在此作用域中尚未声明 58 | float32x4x3_t vin3 = vld3q_f32(din); | ^~~~~~~~~~~~~ main.cpp:59:20: 错误：expected ‘;’ before ‘vsub0’ 59 | float32x4_t vsub0 = vsubq_f32(vin3.val[0], vmean0); | ^~~~~~ | ; main.cpp:60:20: 错误：expected ‘;’ before ‘vsub1’ 60 | float32x4_t vsub1 = vsubq_f32(vin3.val[1], vmean1); | ^~~~~~ | ; main.cpp:61:20: 错误：expected ‘;’ before ‘vsub2’ 61 | float32x4_t vsub2 = vsubq_f32(vin3.val[2], vmean2); | ^~~~~~ | ; main.cpp:62:20: 错误：expected ‘;’ before ‘vs0’ 62 | float32x4_t vs0 = vmulq_f32(vsub0, vscale0); | ^~~~ | ; main.cpp:63:20: 错误：expected ‘;’ before ‘vs1’ 63 | float32x4_t vs1 = vmulq_f32(vsub1, vscale1); | ^~~~ | ; main.cpp:64:20: 错误：expected ‘;’ before ‘vs2’ 64 | float32x4_t vs2 = vmulq_f32(vsub2, vscale2); | ^~~~ | ; main.cpp:65:28: 错误：‘vs0’在此作用域中尚未声明 65 | vst1q_f32(dout_c0, vs0); | ^~~ main.cpp:65:9: 错误：‘vst1q_f32’在此作用域中尚未声明 65 | vst1q_f32(dout_c0, vs0); | ^~~~~~~~~ main.cpp:66:28: 错误：‘vs1’在此作用域中尚未声明 66 | vst1q_f32(dout_c1, vs1); | ^~~ main.cpp:67:28: 错误：‘vs2’在此作用域中尚未声明 67 | vst1q_f32(dout_c2, vs2); | ^~~ make: *** [Makefile:2：main] 错误 1

[paddle-bot-old[bot]]

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[shentanyue]

注释掉使用neon进行图像预处理的代码，改用原生C++实现的图片预处理代码。

[tomfent]

注释掉使用neon进行图像预处理的代码，改用原生C++实现的图片预处理代码。

原生C++实现的图片预处理如何实现？