64 lines
2.2 KiB
C++
64 lines
2.2 KiB
C++
// Copyright (2019-2024) Paul Scherrer Institute
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#include "CPUSpotFinder.h"
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template <int N>
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void FindSpots(StrongPixelSet& set,
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int big_column, int big_row,
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const SpotFindingSettings& settings,
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const int16_t* image) {
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uint64_t sum = 0;
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uint64_t sum2 = 0;
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uint64_t valid_count = 0;
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for (int y = 0; y < N; y++) {
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for (int x = 0; x < N; x++) {
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size_t coord = (big_row * N + y) * RAW_MODULE_COLS + big_column * N + x;
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if ((image[coord] != INT16_MIN) || (image[coord] != INT16_MAX)) {
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sum += image[coord];
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sum2 += image[coord] * image[coord];
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valid_count++;
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}
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}
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}
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int64_t variance = valid_count * sum2 - sum * sum;
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float threshold = variance * settings.signal_to_noise_threshold * settings.signal_to_noise_threshold;
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for (int y = 0; y < N; y++) {
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for (int x = 0; x < N; x++) {
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size_t coord = (big_row * N + y) * RAW_MODULE_COLS + big_column * N + x;
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bool strong_pixel = true;
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if ((settings.photon_count_threshold < 0)
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&& (settings.signal_to_noise_threshold <= 0))
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strong_pixel = false;
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if ((settings.photon_count_threshold >= 0)
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&& (image[coord] < settings.photon_count_threshold)) {
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strong_pixel = false;
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}
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if (settings.signal_to_noise_threshold > 0) {
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int64_t in_minus_mean = image[coord] * valid_count - sum;
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if ((in_minus_mean * in_minus_mean <= threshold)
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|| (in_minus_mean <= 0)
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|| (valid_count < N * N / 2))
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strong_pixel = false;
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}
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if (strong_pixel)
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set.AddStrongPixel(big_column * N + x, big_row * N + y, image[coord]);
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}
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}
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}
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void FindSpots(StrongPixelSet& set,
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const SpotFindingSettings& settings,
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const int16_t* image) {
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for (int i = 0; i < RAW_MODULE_LINES / 32; i++) {
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for (int j = 0; j < RAW_MODULE_COLS / 32; j++)
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FindSpots<32>(set, j, i, settings, image);
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}
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} |