diff options
Diffstat (limited to 'webrtc/modules/video_processing/main/source/brightness_detection.cc')
-rw-r--r-- | webrtc/modules/video_processing/main/source/brightness_detection.cc | 133 |
1 files changed, 0 insertions, 133 deletions
diff --git a/webrtc/modules/video_processing/main/source/brightness_detection.cc b/webrtc/modules/video_processing/main/source/brightness_detection.cc deleted file mode 100644 index bae225b3b0..0000000000 --- a/webrtc/modules/video_processing/main/source/brightness_detection.cc +++ /dev/null @@ -1,133 +0,0 @@ -/* - * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. - * - * Use of this source code is governed by a BSD-style license - * that can be found in the LICENSE file in the root of the source - * tree. An additional intellectual property rights grant can be found - * in the file PATENTS. All contributing project authors may - * be found in the AUTHORS file in the root of the source tree. - */ - -#include "webrtc/modules/video_processing/main/interface/video_processing.h" -#include "webrtc/modules/video_processing/main/source/brightness_detection.h" - -#include <math.h> - -namespace webrtc { - -VPMBrightnessDetection::VPMBrightnessDetection() { - Reset(); -} - -VPMBrightnessDetection::~VPMBrightnessDetection() {} - -void VPMBrightnessDetection::Reset() { - frame_cnt_bright_ = 0; - frame_cnt_dark_ = 0; -} - -int32_t VPMBrightnessDetection::ProcessFrame( - const VideoFrame& frame, - const VideoProcessingModule::FrameStats& stats) { - if (frame.IsZeroSize()) { - return VPM_PARAMETER_ERROR; - } - int width = frame.width(); - int height = frame.height(); - - if (!VideoProcessingModule::ValidFrameStats(stats)) { - return VPM_PARAMETER_ERROR; - } - - const uint8_t frame_cnt_alarm = 2; - - // Get proportion in lowest bins. - uint8_t low_th = 20; - float prop_low = 0; - for (uint32_t i = 0; i < low_th; i++) { - prop_low += stats.hist[i]; - } - prop_low /= stats.num_pixels; - - // Get proportion in highest bins. - unsigned char high_th = 230; - float prop_high = 0; - for (uint32_t i = high_th; i < 256; i++) { - prop_high += stats.hist[i]; - } - prop_high /= stats.num_pixels; - - if (prop_high < 0.4) { - if (stats.mean < 90 || stats.mean > 170) { - // Standard deviation of Y - const uint8_t* buffer = frame.buffer(kYPlane); - float std_y = 0; - for (int h = 0; h < height; h += (1 << stats.subSamplHeight)) { - int row = h*width; - for (int w = 0; w < width; w += (1 << stats.subSamplWidth)) { - std_y += (buffer[w + row] - stats.mean) * (buffer[w + row] - - stats.mean); - } - } - std_y = sqrt(std_y / stats.num_pixels); - - // Get percentiles. - uint32_t sum = 0; - uint32_t median_y = 140; - uint32_t perc05 = 0; - uint32_t perc95 = 255; - float pos_perc05 = stats.num_pixels * 0.05f; - float pos_median = stats.num_pixels * 0.5f; - float posPerc95 = stats.num_pixels * 0.95f; - for (uint32_t i = 0; i < 256; i++) { - sum += stats.hist[i]; - if (sum < pos_perc05) perc05 = i; // 5th perc. - if (sum < pos_median) median_y = i; // 50th perc. - if (sum < posPerc95) - perc95 = i; // 95th perc. - else - break; - } - - // Check if image is too dark - if ((std_y < 55) && (perc05 < 50)) { - if (median_y < 60 || stats.mean < 80 || perc95 < 130 || - prop_low > 0.20) { - frame_cnt_dark_++; - } else { - frame_cnt_dark_ = 0; - } - } else { - frame_cnt_dark_ = 0; - } - - // Check if image is too bright - if ((std_y < 52) && (perc95 > 200) && (median_y > 160)) { - if (median_y > 185 || stats.mean > 185 || perc05 > 140 || - prop_high > 0.25) { - frame_cnt_bright_++; - } else { - frame_cnt_bright_ = 0; - } - } else { - frame_cnt_bright_ = 0; - } - } else { - frame_cnt_dark_ = 0; - frame_cnt_bright_ = 0; - } - } else { - frame_cnt_bright_++; - frame_cnt_dark_ = 0; - } - - if (frame_cnt_dark_ > frame_cnt_alarm) { - return VideoProcessingModule::kDarkWarning; - } else if (frame_cnt_bright_ > frame_cnt_alarm) { - return VideoProcessingModule::kBrightWarning; - } else { - return VideoProcessingModule::kNoWarning; - } -} - -} // namespace webrtc |