diff options
Diffstat (limited to 'arm_compute/core/Helpers.h')
-rw-r--r-- | arm_compute/core/Helpers.h | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/arm_compute/core/Helpers.h b/arm_compute/core/Helpers.h index 34e4e6f885..09c672ecfa 100644 --- a/arm_compute/core/Helpers.h +++ b/arm_compute/core/Helpers.h @@ -146,7 +146,7 @@ inline T delta_bilinear_c1(const T *pixel_ptr, size_t stride, float dx, float dy } /** Computes bilinear interpolation for quantized input and output, using the pointer to the top-left pixel and the pixel's distance between - * the real coordinates and the smallest following integer coordinates. Input must be quantized and in single channel format. + * the real coordinates and the smallest following integer coordinates. Input must be QASYMM8 and in single channel format. * * @param[in] pixel_ptr Pointer to the top-left pixel value of a single channel input. * @param[in] stride Stride to access the bottom-left and bottom-right pixel values @@ -179,6 +179,40 @@ inline uint8_t delta_bilinear_c1_quantized(const uint8_t *pixel_ptr, size_t stri return static_cast<uint8_t>(quantize_qasymm8(res, oq_info)); } +/** Computes bilinear interpolation for quantized input and output, using the pointer to the top-left pixel and the pixel's distance between + * the real coordinates and the smallest following integer coordinates. Input must be QASYMM8_SIGNED and in single channel format. + * + * @param[in] pixel_ptr Pointer to the top-left pixel value of a single channel input. + * @param[in] stride Stride to access the bottom-left and bottom-right pixel values + * @param[in] dx Pixel's distance between the X real coordinate and the smallest X following integer + * @param[in] dy Pixel's distance between the Y real coordinate and the smallest Y following integer + * @param[in] iq_info Input QuantizationInfo + * @param[in] oq_info Output QuantizationInfo + * + * @note dx and dy must be in the range [0, 1.0] + * + * @return The bilinear interpolated pixel value + */ +inline int8_t delta_bilinear_c1_quantized(const int8_t *pixel_ptr, size_t stride, float dx, float dy, UniformQuantizationInfo iq_info, UniformQuantizationInfo oq_info) +{ + ARM_COMPUTE_ERROR_ON(pixel_ptr == nullptr); + + const float dx1 = 1.0f - dx; + const float dy1 = 1.0f - dy; + + const float a00 = dequantize_qasymm8_signed(*pixel_ptr, iq_info); + const float a01 = dequantize_qasymm8_signed(*(pixel_ptr + 1), iq_info); + const float a10 = dequantize_qasymm8_signed(*(pixel_ptr + stride), iq_info); + const float a11 = dequantize_qasymm8_signed(*(pixel_ptr + stride + 1), iq_info); + + const float w1 = dx1 * dy1; + const float w2 = dx * dy1; + const float w3 = dx1 * dy; + const float w4 = dx * dy; + float res = a00 * w1 + a01 * w2 + a10 * w3 + a11 * w4; + return static_cast<int8_t>(quantize_qasymm8_signed(res, oq_info)); +} + /** Computes linear interpolation using the pointer to the top pixel and the pixel's distance between * the real coordinates and the smallest following integer coordinates. Input must be in single channel format. * |