tlopex commented on issue #15148:
URL: https://github.com/apache/tvm/issues/15148#issuecomment-1739727222
@p3achyjr
``` # calculate the mean and quantization scale for every input
tensor,
# with respect to its fp32 input range, defined in fake_quant.
# s = 255/(fmax-fmin); m = -fmin*s (the zero point)
for i in input_arrays:
try:
quant_scale = 255 / (input_range[i][1] -
input_range[i][0])
except ZeroDivisionError:
print("Min and max of the input range for tensor " + i +
" can't be equal")
mean = -input_range[i][0] * quant_scale
input_stats[i] = (mean, quant_scale)```
Here, if the range is symmetrical, the zero point will always be 128.
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