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Commit 57c4cb2

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add stream_downscaled to MotionDetectionRGB example
1 parent 38b951c commit 57c4cb2

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3 files changed

+47
-11
lines changed

3 files changed

+47
-11
lines changed

‎examples/Vision/MotionDetection/MotionDetectionRGBExample/MotionDetectionRGBExample.ino

Lines changed: 13 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -24,6 +24,7 @@ using namespace Eloquent::Vision;
2424

2525
camera_fb_t *frame;
2626
Camera::ESP32Camera camera(PIXFORMAT);
27+
uint8_t downscaled[w * h];
2728
//IO::Decoders::GrayscaleRandomAccessDecoder decoder;
2829
IO::Decoders::Red565RandomAccessDecoder decoder;
2930
Processing::Downscaling::Center<W / w, H / h> strategy;
@@ -34,6 +35,7 @@ IO::Writers::JpegWriter<W, H> jpegWriter;
3435

3536
void capture();
3637
void save();
38+
void stream_downscaled();
3739
void stream();
3840

3941

@@ -64,7 +66,10 @@ void loop() {
6466
// save();
6567

6668
// uncomment to stream to the Python script for visualization
67-
//stream();
69+
// stream();
70+
71+
// uncomment to stream downscaled imaged tp Python script
72+
// stream_downscaled();
6873

6974
delay(1000);
7075
}
@@ -74,18 +79,13 @@ void loop() {
7479

7580

7681
void capture() {
77-
uint32_t start = millis();
78-
uint8_t downscaled[w * h];
79-
8082
timeit("capture frame", frame = camera.capture());
8183

8284
// scale image from size H * W to size h * w
8385
timeit("downscale", downscaler.downscale(frame->buf, downscaled));
8486

8587
// detect motion on the downscaled image
8688
timeit("motion detection", motion.detect(downscaled));
87-
88-
//eloquent::io::print_all(1000 / (millis() - start), " FPS");
8989
}
9090

9191

@@ -106,4 +106,11 @@ void stream() {
106106
jpegWriter.write(Serial, frame->buf, PIXFORMAT, 30);
107107

108108
eloquent::io::print_all("END OF FRAME");
109+
}
110+
111+
112+
void stream_downscaled() {
113+
eloquent::io::print_all("START OF DOWNSCALED");
114+
eloquent::io::print_array(downscaled, w * h);
115+
eloquent::io::print_all("END OF DOWNSCALED");
109116
}

‎examples/Vision/MotionDetection/MotionDetectionRGBExample/stream_captures.py

Lines changed: 29 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,21 @@
1+
import numpy as np
12
from serial import Serial
3+
from PIL import Image
4+
5+
6+
def infer_size(arr, ratio):
7+
"""
8+
Try to infer image sizes given the ratio width / height
9+
:param arr:
10+
:param ratio:
11+
:return:
12+
"""
13+
for height in range(2, 129, 2):
14+
width = int(height * ratio)
15+
size = width * height
16+
if size == len(arr):
17+
return width, height
18+
raise AssertionError('Cannot find image size (len=%d, ratio=%.2f)' % (len(arr), ratio))
219

320

421
if __name__ == '__main__':
@@ -20,13 +37,24 @@
2037
try:
2138
text += byte.decode('utf-8')
2239
if text.endswith('END OF FRAME'):
23-
with open('frame%d.jpg' % idx, 'wb') as file:
40+
with open('captures/frame%d.jpg' % idx, 'wb') as file:
2441
for byte in jpeg[:-len('END OF FRAME')]:
2542
file.write(byte)
2643
print('done', idx)
2744
idx += 1
2845
break
2946
except UnicodeDecodeError:
3047
pass
48+
elif line == 'START OF DOWNSCALED':
49+
print('new downscaled')
50+
raw = camera.readline().decode('utf-8').strip()
51+
arr = np.asarray([int(pixel) for pixel in raw.split(',')], dtype=np.uint8)
52+
w, h = infer_size(arr, 4/3)
53+
img = arr.reshape((h, w))
54+
img = Image.fromarray(img, 'L')
55+
img.save('downscaled/%d.jpg' % idx)
56+
print('done', idx)
57+
idx += 1
58+
3159
except UnicodeDecodeError:
3260
pass

‎library.properties

Lines changed: 5 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -1,9 +1,10 @@
11
name=EloquentArduino
22
version=1.1.0
3-
author=Simone Salerno <github.com/eloquentarduino>
4-
maintainer=Simone Salerno <github.com/eloquentarduino>
5-
sentence=An eloquent interface to common Arduino patterns
6-
paragraph=
3+
author=Simone Salerno <eloquentarduino@gmail.com>
4+
maintainer=Simone Salerno <eloquentarduino@gmail.com>
5+
sentence=An eloquent interface to common Arduino patterns, data structures and algorithms
6+
paragraph=Follow the blog at eloquentarduino.github.io for details
77
category=Other
88
url=https://github.com/eloquentarduino/EloquentArduino
99
architectures=*
10+
includes=eloquentarduino.h

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