double ExRandomTrees::lnFunc(double num){
if(num <= 1e-6){
return 0;
}
else{
return num * fast_log2(float(num));
//return num * log(num);
}
}
float GainComputer::operator()(const float x) const {
const auto abs_x = std::abs(x);
const auto db = (abs_x < lin_floor) ? db_floor : log2_db_k * fast_log2(abs_x);
const auto overshoot_db = db - threshold_db;
if( knee_width_db > 0.0f ) {
const auto w2 = knee_width_db / 2.0f;
const auto a = w2 / (knee_width_db * knee_width_db);
const auto in_transition = (overshoot_db > -w2) && (overshoot_db < w2);
const auto rectified_overshoot = in_transition ? (a * std::pow(overshoot_db + w2, 2.0f)) : std::max(overshoot_db, 0.0f);
return rectified_overshoot * slope;
} else {
const auto rectified_overshoot = std::max(overshoot_db, 0.0f);
return rectified_overshoot * slope;
}
}
static int set_auto_gain(sensor_t *sensor, int enable, float gain_db, float gain_db_ceiling)
{
uint8_t reg;
int ret = cambus_readb(sensor->slv_addr, BANK_SEL, ®);
ret |= cambus_writeb(sensor->slv_addr, BANK_SEL, reg | BANK_SEL_SENSOR);
ret |= cambus_readb(sensor->slv_addr, COM8, ®);
ret |= cambus_writeb(sensor->slv_addr, COM8, (reg & (~COM8_AGC_EN)) | ((enable != 0) ? COM8_AGC_EN : 0));
if ((enable == 0) && (!isnanf(gain_db)) && (!isinff(gain_db))) {
float gain = IM_MAX(IM_MIN(fast_expf((gain_db / 20.0) * fast_log(10.0)), 32.0), 1.0);
int gain_temp = fast_roundf(fast_log2(IM_MAX(gain / 2.0, 1.0)));
int gain_hi = 0xF >> (4 - gain_temp);
int gain_lo = IM_MIN(fast_roundf(((gain / (1 << gain_temp)) - 1.0) * 16.0), 15);
ret |= cambus_writeb(sensor->slv_addr, GAIN, (gain_hi << 4) | (gain_lo << 0));
} else if ((enable != 0) && (!isnanf(gain_db_ceiling)) && (!isinff(gain_db_ceiling))) {
static int set_auto_gain(sensor_t *sensor, int enable, float gain_db, float gain_db_ceiling)
{
uint8_t reg;
int ret = cambus_readb(sensor->slv_addr, REG_COM8, ®);
ret |= cambus_writeb(sensor->slv_addr, REG_COM8, (reg & (~REG_COM8_AGC)) | ((enable != 0) ? REG_COM8_AGC : 0));
if ((enable == 0) && (!isnanf(gain_db)) && (!isinf(gain_db))) {
float gain = IM_MAX(IM_MIN(fast_expf((gain_db / 20.0) * fast_log(10.0)), 128.0), 1.0);
int gain_temp = fast_roundf(fast_log2(IM_MAX(gain / 2.0, 1.0)));
int gain_hi = 0x3F >> (6 - gain_temp);
int gain_lo = IM_MIN(fast_roundf(((gain / (1 << gain_temp)) - 1.0) * 16.0), 15);
ret |= cambus_writeb(sensor->slv_addr, REG_GAIN, ((gain_hi & 0x0F) << 4) | (gain_lo << 0));
ret |= cambus_readb(sensor->slv_addr, REG_VREF, ®);
ret |= cambus_writeb(sensor->slv_addr, REG_VREF, ((gain_hi & 0x30) << 2) | (reg & 0x3F));
} else if ((enable != 0) && (!isnanf(gain_db_ceiling)) && (!isinf(gain_db_ceiling))) {
/** Error of ~0.01% */
float fast_log(float val)
{
return (fast_log2 (val) * 0.69314718f);
}
JNIEXPORT void JNICALL Java_com_lightcrafts_jai_opimage_ColorSelectionMaskOpImage_nativeUshortLoop
(JNIEnv *env, jobject cls, jshortArray jsrcData, jbyteArray jdstData,
jint width, jint height, jintArray jsrcBandOffsets,
jint dstOffset, jint srcLineStride, jint dstLineStride,
jfloatArray jcolorSelection, jfloat wr, jfloat wg, jfloat wb)
{
ushort *srcData = (ushort *) env->GetPrimitiveArrayCritical(jsrcData, 0);
byte *dstData = (byte *) env->GetPrimitiveArrayCritical(jdstData, 0);
int *srcBandOffsets = (int *) env->GetPrimitiveArrayCritical(jsrcBandOffsets, 0);
float *colorSelection = (float *) env->GetPrimitiveArrayCritical(jcolorSelection, 0);
int srcROffset = srcBandOffsets[0];
int srcGOffset = srcBandOffsets[1];
int srcBOffset = srcBandOffsets[2];
float hueLower = colorSelection[0];
float hueLowerFeather = colorSelection[1];
float hueUpper = colorSelection[2];
float hueUpperFeather = colorSelection[3];
float luminosityLower = colorSelection[4];
float luminosityLowerFeather = colorSelection[5];
float luminosityUpper = colorSelection[6];
float luminosityUpperFeather = colorSelection[7];
int hueOffset = 0;
if (hueLower < 0 || hueLower - hueLowerFeather < 0 || hueUpper < 0) {
hueLower += 1;
hueUpper += 1;
hueOffset = 1;
} else if (hueLower > 1 || hueUpper + hueUpperFeather > 1 || hueUpper > 1) {
hueOffset = -1;
}
for (int row = 0; row < height; row++) {
for (int col = 0; col < width; col++) {
float r = srcData[3 * col + row * srcLineStride + srcROffset];
float g = srcData[3 * col + row * srcLineStride + srcGOffset];
float b = srcData[3 * col + row * srcLineStride + srcBOffset];
// float hue = hue(r / (float) 0xffff, g / (float) 0xffff, b / (float) 0xffff) / (float) (2 * Math.PI);
float cmax = (r > g) ? r : g;
if (b > cmax) cmax = b;
float cmin = (r < g) ? r : g;
if (b < cmin) cmin = b;
float saturation;
if (cmax != 0)
saturation = (cmax - cmin) / cmax;
else
saturation = 0;
#if defined(__ppc__)
float luminosity = (float) (log1pf((wr * r + wg * g + wb * b)/0x100) / (8 * logf(2)));
#else
float luminosity = (float) (fast_log2((wr * r + wg * g + wb * b)/0x100) / 8);
#endif
float luminosityMask, colorMask;
const float stmin = 0.01f;
const float stmax = 0.02f;
const float ltmin = .01;
const float ltmax = .02;
if (saturation > stmin && luminosity > ltmin) {
float h = hue(r, g, b) / (float) (2 * M_PI);
if (hueOffset == 1 && h < hueLower - hueLowerFeather)
h += 1;
else if (hueOffset == -1 && h < 0.5)
h += 1;
if (h >= hueLower && h <= hueUpper)
colorMask = 1;
else if (h >= (hueLower - hueLowerFeather) && h < hueLower)
colorMask = (h - (hueLower - hueLowerFeather))/hueLowerFeather;
else if (h > hueUpper && h <= (hueUpper + hueUpperFeather))
colorMask = (hueUpper + hueUpperFeather - h)/hueUpperFeather;
else
colorMask = 0;
if (saturation < stmax)
colorMask *= (saturation - stmin) / (stmax - stmin);
if (luminosity < ltmax)
colorMask *= (luminosity - ltmin) / (ltmax - ltmin);
} else
colorMask = 0;
if (luminosity >= luminosityLower && luminosity <= luminosityUpper)
luminosityMask = 1;
else if (luminosity >= (luminosityLower - luminosityLowerFeather) && luminosity < luminosityLower)
luminosityMask = (luminosity - (luminosityLower - luminosityLowerFeather))/luminosityLowerFeather;
else if (luminosity > luminosityUpper && luminosity <= (luminosityUpper + luminosityUpperFeather))
luminosityMask = (luminosityUpper + luminosityUpperFeather - luminosity)/luminosityUpperFeather;
else
luminosityMask = 0;
colorMask *= luminosityMask;
dstData[col + row * dstLineStride + dstOffset] = (byte) (0xff * colorMask);
}
}
env->ReleasePrimitiveArrayCritical(jsrcData, srcData, 0);
env->ReleasePrimitiveArrayCritical(jdstData, dstData, 0);
env->ReleasePrimitiveArrayCritical(jsrcBandOffsets, srcBandOffsets, 0);
env->ReleasePrimitiveArrayCritical(jcolorSelection, colorSelection, 0);
}
FFTX_FN_PREFIX
inline float fast_log10 (const float val) {
return fast_log2(val) / 3.312500f;
}
FFTX_FN_PREFIX
inline float fast_log (const float val) {
return (fast_log2 (val) * 0.69314718f);
}
inline float fast_log(float x)
{
return 0.69314718f * fast_log2 (x);
}
inline float fast_log (const float &val)
{
return (fast_log2 (val) * 0.69314718f);
}