Ruben Brunk | 370e243 | 2014-10-14 18:33:23 -0700 | [diff] [blame] | 1 | # Copyright 2013 The Android Open Source Project |
| 2 | # |
| 3 | # Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | # you may not use this file except in compliance with the License. |
| 5 | # You may obtain a copy of the License at |
| 6 | # |
| 7 | # http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | # |
| 9 | # Unless required by applicable law or agreed to in writing, software |
| 10 | # distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | # See the License for the specific language governing permissions and |
| 13 | # limitations under the License. |
| 14 | |
| 15 | import its.image |
| 16 | import its.caps |
| 17 | import its.device |
| 18 | import its.objects |
| 19 | import its.target |
| 20 | import pylab |
| 21 | import os.path |
| 22 | import matplotlib |
| 23 | import matplotlib.pyplot |
| 24 | |
| 25 | def main(): |
| 26 | """Test that the android.noiseReduction.mode param is applied when set. |
| 27 | |
| 28 | Capture images with the camera dimly lit. Uses a high analog gain to |
| 29 | ensure the captured image is noisy. |
| 30 | |
| 31 | Captures three images, for NR off, "fast", and "high quality". |
| 32 | Also captures an image with low gain and NR off, and uses the variance |
| 33 | of this as the baseline. |
| 34 | """ |
| 35 | NAME = os.path.basename(__file__).split(".")[0] |
| 36 | |
| 37 | # List of variances for Y,U,V. |
| 38 | variances = [[],[],[]] |
| 39 | |
| 40 | # Reference (baseline) variance for each of Y,U,V. |
| 41 | ref_variance = [] |
| 42 | |
| 43 | nr_modes_reported = [] |
| 44 | |
| 45 | with its.device.ItsSession() as cam: |
| 46 | props = cam.get_camera_properties() |
Chien-Yu Chen | bad96ca | 2014-10-20 17:30:56 -0700 | [diff] [blame] | 47 | its.caps.skip_unless(its.caps.compute_target_exposure(props)) |
Ruben Brunk | 370e243 | 2014-10-14 18:33:23 -0700 | [diff] [blame] | 48 | |
| 49 | # NR mode 0 with low gain |
| 50 | e, s = its.target.get_target_exposure_combos(cam)["minSensitivity"] |
| 51 | req = its.objects.manual_capture_request(s, e) |
| 52 | req["android.noiseReduction.mode"] = 0 |
| 53 | cap = cam.do_capture(req) |
| 54 | its.image.write_image( |
| 55 | its.image.convert_capture_to_rgb_image(cap), |
| 56 | "%s_low_gain.jpg" % (NAME)) |
| 57 | planes = its.image.convert_capture_to_planes(cap) |
| 58 | for j in range(3): |
| 59 | img = planes[j] |
| 60 | tile = its.image.get_image_patch(img, 0.45, 0.45, 0.1, 0.1) |
| 61 | ref_variance.append(its.image.compute_image_variances(tile)[0]) |
| 62 | print "Ref variances:", ref_variance |
| 63 | |
| 64 | for i in range(3): |
| 65 | # NR modes 0, 1, 2 with high gain |
| 66 | e, s = its.target.get_target_exposure_combos(cam)["maxSensitivity"] |
| 67 | req = its.objects.manual_capture_request(s, e) |
| 68 | req["android.noiseReduction.mode"] = i |
| 69 | cap = cam.do_capture(req) |
| 70 | nr_modes_reported.append( |
| 71 | cap["metadata"]["android.noiseReduction.mode"]) |
| 72 | its.image.write_image( |
| 73 | its.image.convert_capture_to_rgb_image(cap), |
| 74 | "%s_high_gain_nr=%d.jpg" % (NAME, i)) |
| 75 | planes = its.image.convert_capture_to_planes(cap) |
| 76 | for j in range(3): |
| 77 | img = planes[j] |
| 78 | tile = its.image.get_image_patch(img, 0.45, 0.45, 0.1, 0.1) |
| 79 | variance = its.image.compute_image_variances(tile)[0] |
| 80 | variances[j].append(variance / ref_variance[j]) |
| 81 | print "Variances with NR mode [0,1,2]:", variances |
| 82 | |
| 83 | # Draw a plot. |
| 84 | for j in range(3): |
| 85 | pylab.plot(range(3), variances[j], "rgb"[j]) |
| 86 | matplotlib.pyplot.savefig("%s_plot_variances.png" % (NAME)) |
| 87 | |
| 88 | assert(nr_modes_reported == [0,1,2]) |
| 89 | |
| 90 | # Check that the variance of the NR=0 image is higher than for the |
| 91 | # NR=1 and NR=2 images. |
| 92 | for j in range(3): |
| 93 | for i in range(1,3): |
| 94 | assert(variances[j][i] < variances[j][0]) |
| 95 | |
| 96 | if __name__ == '__main__': |
| 97 | main() |
| 98 | |