| # Copyright 2014 The Android Open Source Project |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| """Verifies EV compensation is applied.""" |
| |
| |
| import logging |
| import math |
| import os.path |
| import matplotlib |
| from matplotlib import pylab |
| from mobly import test_runner |
| import numpy as np |
| |
| import its_base_test |
| import camera_properties_utils |
| import capture_request_utils |
| import image_processing_utils |
| import its_session_utils |
| |
| LOCKED = 3 |
| LUMA_LOCKED_RTOL_EV_SM = 0.05 |
| LUMA_LOCKED_RTOL_EV_LG = 0.10 |
| NAME = os.path.splitext(os.path.basename(__file__))[0] |
| NUM_UNSATURATED_EVS = 3 |
| PATCH_H = 0.1 # center 10% |
| PATCH_W = 0.1 |
| PATCH_X = 0.5 - PATCH_W/2 |
| PATCH_Y = 0.5 - PATCH_H/2 |
| THRESH_CONVERGE_FOR_EV = 8 # AE must converge within this num |
| YUV_FULL_SCALE = 255.0 |
| YUV_SAT_MIN = 250.0 |
| YUV_SAT_TOL = 3.0 |
| |
| |
| def create_request_with_ev(ev): |
| req = capture_request_utils.auto_capture_request() |
| req['android.control.aeExposureCompensation'] = ev |
| req['android.control.aeLock'] = True |
| return req |
| |
| |
| def extract_luma_from_capture(cap): |
| """Extract luma from capture.""" |
| y = image_processing_utils.convert_capture_to_planes(cap)[0] |
| patch = image_processing_utils.get_image_patch( |
| y, PATCH_X, PATCH_Y, PATCH_W, PATCH_H) |
| luma = image_processing_utils.compute_image_means(patch)[0] |
| return luma |
| |
| |
| class EvCompensationBasicTest(its_base_test.ItsBaseTest): |
| """Tests that EV compensation is applied.""" |
| |
| def test_ev_compensation_basic(self): |
| logging.debug('Starting %s', NAME) |
| with its_session_utils.ItsSession( |
| device_id=self.dut.serial, |
| camera_id=self.camera_id, |
| hidden_physical_id=self.hidden_physical_id) as cam: |
| props = cam.get_camera_properties() |
| props = cam.override_with_hidden_physical_camera_props(props) |
| log_path = self.log_path |
| debug = self.debug_mode |
| test_name_w_path = os.path.join(log_path, NAME) |
| |
| # check SKIP conditions |
| camera_properties_utils.skip_unless( |
| camera_properties_utils.ev_compensation(props) and |
| camera_properties_utils.ae_lock(props)) |
| |
| # Load chart for scene |
| its_session_utils.load_scene( |
| cam, props, self.scene, self.tablet, self.chart_distance) |
| |
| # Create ev compensation changes |
| ev_per_step = capture_request_utils.rational_to_float( |
| props['android.control.aeCompensationStep']) |
| steps_per_ev = int(1.0 / ev_per_step) |
| evs = range(-2 * steps_per_ev, 2 * steps_per_ev + 1, steps_per_ev) |
| luma_locked_rtols = [LUMA_LOCKED_RTOL_EV_LG, |
| LUMA_LOCKED_RTOL_EV_SM, |
| LUMA_LOCKED_RTOL_EV_SM, |
| LUMA_LOCKED_RTOL_EV_SM, |
| LUMA_LOCKED_RTOL_EV_LG] |
| |
| # Converge 3A, and lock AE once converged. skip AF trigger as |
| # dark/bright scene could make AF convergence fail and this test |
| # doesn't care the image sharpness. |
| mono_camera = camera_properties_utils.mono_camera(props) |
| cam.do_3a(ev_comp=0, lock_ae=True, do_af=False, mono_camera=mono_camera) |
| |
| # Do captures and extract information |
| largest_yuv = capture_request_utils.get_largest_yuv_format(props) |
| match_ar = (largest_yuv['width'], largest_yuv['height']) |
| fmt = capture_request_utils.get_smallest_yuv_format( |
| props, match_ar=match_ar) |
| lumas = [] |
| for j, ev in enumerate(evs): |
| luma_locked_rtol = luma_locked_rtols[j] |
| # Capture a single shot with the same EV comp and locked AE. |
| req = create_request_with_ev(ev) |
| caps = cam.do_capture([req]*THRESH_CONVERGE_FOR_EV, fmt) |
| luma_locked = [] |
| for i, cap in enumerate(caps): |
| if debug: |
| img = image_processing_utils.convert_capture_to_rgb_image( |
| cap, props) |
| image_processing_utils.write_image( |
| img, f'{test_name_w_path}_ev{ev}_frame{i}.jpg') |
| if cap['metadata']['android.control.aeState'] == LOCKED: |
| ev_meta = cap['metadata']['android.control.aeExposureCompensation'] |
| logging.debug('cap EV compensation: %d', ev_meta) |
| if ev != ev_meta: |
| raise AssertionError( |
| f'EV compensation cap != req! cap: {ev_meta}, req: {ev}') |
| luma = extract_luma_from_capture(cap) |
| luma_locked.append(luma) |
| if i == THRESH_CONVERGE_FOR_EV-1: |
| lumas.append(luma) |
| if not math.isclose(min(luma_locked), max(luma_locked), |
| rel_tol=luma_locked_rtol): |
| raise AssertionError(f'AE locked lumas: {luma_locked}, ' |
| f'RTOL: {luma_locked_rtol}') |
| logging.debug('lumas in AE locked captures: %s', str(lumas)) |
| if caps[THRESH_CONVERGE_FOR_EV-1]['metadata'][ |
| 'android.control.aeState'] != LOCKED: |
| raise AssertionError(f'No AE lock by {THRESH_CONVERGE_FOR_EV} frame.') |
| |
| # Create plot |
| pylab.figure(NAME) |
| pylab.plot(evs, lumas, '-ro') |
| pylab.title(NAME) |
| pylab.xlabel('EV Compensation') |
| pylab.ylabel('Mean Luma (Normalized)') |
| matplotlib.pyplot.savefig(f'{test_name_w_path}_plot_means.png') |
| |
| # Trim extra saturated images |
| while (lumas[-2] >= YUV_SAT_MIN/YUV_FULL_SCALE and |
| lumas[-1] >= YUV_SAT_MIN/YUV_FULL_SCALE and |
| len(lumas) > 2): |
| lumas.pop(-1) |
| logging.debug('Removed saturated image.') |
| |
| # Only allow positive EVs to give saturated image |
| if len(lumas) < NUM_UNSATURATED_EVS: |
| raise AssertionError( |
| f'>{NUM_UNSATURATED_EVS-1} unsaturated images needed.') |
| min_luma_diffs = min(np.diff(lumas)) |
| logging.debug('Min of luma value difference between adjacent ev comp: %.3f', |
| min_luma_diffs) |
| |
| # Assert unsaturated lumas increasing with increasing ev comp. |
| if min_luma_diffs <= 0: |
| raise AssertionError('Lumas not increasing with ev comp! ' |
| f'EVs: {list(evs)}, lumas: {lumas}') |
| |
| |
| if __name__ == '__main__': |
| test_runner.main() |