> In that case min and max values passed into the quantized conv are always 0
> and 255.
Not true. When there is activation, the range is not always 0 ~ 255. For
example RELU,
```cpp
auto quantize = [scale, zero_point](float f) {
return zero_point + static_cast<int32_t>(TfLiteRound(f / scale));
};
*act_min = std::max(qmin, quantize(0.0));
*act_max = qmax;
```
We have proved that compute as this way and could make the result the same as
TFLite.
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