Image processing datatypes and algorithms for Arduino and Esp32
License: GNU General Public License v3.0
This library contains source code and examples from the eloquentarduino blog, covering very different topics:
You can install this library either by cloning the repo or directly from the Arduino IDE Library Manager.
If you're interested in TinyML, I suggest you check out the EloquentTinyML library.
When running the Video Streaming Server Example for an AI Thinker camera, rather than getting an image on the web page, I get continually scrolling random looking text. It appears that the browser is not being instructed to interpret the output as an image or the image file is improper.
Thoughts?
I'm aware that the ESP Camera can only serve a single connection at any time.
But closing the stream and then trying to reconnect always fails until i reset the ESP.
I'm using the simple HTTPstream example with an AI-Thinker ESP32CAM devkit.
Attempting to reconnect to the server gives no output on the serial debugger.
In io/JpegWriter a variable wasn't freed, this bug is already fixed, but the latest version was released before the fix. This causes my program to crash after ca. 50 calls, because every time va. 64 kb get allocated, but never freed. This makes the latest version in Arduino IDE library marketplace unusable. PLEASE UPDATE to new version, where this bug is fixed, so nobody has to waste houurs trying to find out, where memory is lost.
In file included from .pio/libdeps/esp32cam/EloquentVision/src/EloquentVision.h:8:0,
from src\main.cpp:3:
.pio/libdeps/esp32cam/EloquentVision/src/ImageProcessing/MotionDetection.h: In instantiation of 'Eloquent::Vision::MotionDetection<sourceWidth, sourceHeight, blockSize>::MotionDetection(Eloquent::Vision::ImageProcessing::Downscale::ImageDownscaler) [with short unsigned int sourceWidth = 320u; short
unsigned int sourceHeight = 240u; unsigned char blockSize = 10u; Eloquent::Vision::ImageProcessing::Downscale::ImageDownscaler = unsigned char (*)(unsigned char*, short unsigned int, short unsigned int, short unsigned int, short unsigned int, unsigned char); uint8_t = unsigned char; uint16_t = short unsigned int]':
src\main.cpp:17:72: required from here
.pio/libdeps/esp32cam/EloquentVision/src/ImageProcessing/MotionDetection.h:81:29: error: 'Eloquent::Vision::MotionDetection<320u, 240u, 10u>::_downscaler' will be initialized after [-Werror=reorder]
ImageDownscaler _downscaler;
^
.pio/libdeps/esp32cam/EloquentVision/src/ImageProcessing/MotionDetection.h:80:19: error: 'float Eloquent::Vision::MotionDetection<320u, 240u, 10u>::_threshold' [-Werror=reorder]
float _threshold;
^
.pio/libdeps/esp32cam/EloquentVision/src/ImageProcessing/MotionDetection.h:13:13: error: when initialized here [-Werror=reorder]
MotionDetection(ImageDownscaler downscaler) :
^
cc1plus.exe: some warnings being treated as errors
*** [.pio\build\esp32cam\src\main.cpp.o] Error 1
==================================== [FAILED] Took 5.99 seconds ====================================
The workaround for this error is to include the following line at platformio.ini file:
build_unflags = -Werror=reorder
Hello, im getting this error when running any of the code examples on my ESP32 cam.
[E][camera.c:1113] camera_probe(): Detected camera not supported.
[E][camera.c:1379] esp_camera_init(): Camera probe failed with error 0x20004
Guru Meditation Error: Core 1 panic'ed (LoadProhibited). Exception was unhandled.
Core 1 register dump:
PC : 0x400d0d47 PS : 0x00060c30 A0 : 0x800d0e12 A1 : 0x3ffb1ef0
A2 : 0x00000001 A3 : 0x00000005 A4 : 0x00020004 A5 : 0x0000001e
A6 : 0x01312d00 A7 : 0x00000000 A8 : 0x800d0d45 A9 : 0x3ffb1ed0
A10 : 0x00000000 A11 : 0x00000005 A12 : 0x000000ff A13 : 0x00000000
A14 : 0x00ff0000 A15 : 0x40404040 SAR : 0x00000004 EXCCAUSE: 0x0000001c
EXCVADDR: 0x00000040 LBEG : 0x4008d391 LEND : 0x4008d3a1 LCOUNT : 0xfffffffb
ELF file SHA256: 0000000000000000
Backtrace: 0x400d0d47:0x3ffb1ef0 0x400d0e0f:0x3ffb1f70 0x400d257a:0x3ffb1fb0 0x4008fab6:0x3ffb1fd0
Rebooting...
I'm really new so at first I was just testing the examples out of the box. Does this error really mean that the camera that comes with my ESP32 microprocessor is not supported or could be something else? how do I know which versions/models/stuff are supported?
Thanks
I think you have to free the allocated memory by fmt2jpg.
after file.write(jpeg, len);
free(jpeg);
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