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esp32cam-demo
kopia lustrzana https://github.com/alanesq/esp32cam-demo
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Alan 2023-10-15 21:08:24 +01:00 zatwierdzone przez GitHub
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ESP32cam-demo.ino
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@ -59,7 +59,7 @@
#include <Arduino.h>
// forward declarations
bool initialiseCamera(int);
bool initialiseCamera(bool);
bool cameraImageSettings();
void changeResolution(framesize_t);
String localTime();
@ -80,6 +80,7 @@
void setupFlashPWM();
void handleData();
void readGreyscaleImage();
void resize_esp32cam_image_buffer(uint8_t*, int, int, uint8_t*, int, int);
// ---------------------------------------------------------------
@ -407,8 +408,9 @@ void loop() {
// reset - if set to 1 all settings are reconfigured
// if set to zero you can change the settings and call this procedure to apply them
bool initialiseCamera(int reset) {
bool initialiseCamera(bool reset) {
// set the camera parameters in 'config'
if (reset) {
config.ledc_channel = LEDC_CHANNEL_0;
config.ledc_timer = LEDC_TIMER_0;
@ -435,6 +437,7 @@ if (reset) {
// 1600x1200 (UXGA)
config.jpeg_quality = 12; // 0-63 lower number means higher quality (can cause failed image capture if set too low at higher resolutions)
config.fb_count = 1; // if more than one, i2s runs in continuous mode. Use only with JPEG
}
// check the esp32cam board has a psram chip installed (extra memory used for storing captured images)
// Note: if not using "AI thinker esp32 cam" in the Arduino IDE, SPIFFS must be enabled
@ -442,7 +445,6 @@ if (reset) {
if (serialDebug) Serial.println("Warning: No PSRam found so defaulting to image size 'CIF'");
config.frame_size = FRAMESIZE_CIF;
}
}
//#if defined(CAMERA_MODEL_ESP_EYE)
// pinMode(13, INPUT_PULLUP);
@ -454,7 +456,7 @@ if (reset) {
if (serialDebug) Serial.printf("ERROR: Camera init failed with error 0x%x", camerr);
}
cameraImageSettings(); // apply custom camera image settings
cameraImageSettings(); // apply the camera image settings
return (camerr == ESP_OK); // return boolean result of camera initialisation
}
@ -506,15 +508,15 @@ bool cameraImageSettings() {
// // more info on settings here: https://randomnerdtutorials.com/esp32-cam-ov2640-camera-settings/
// s->set_gain_ctrl(s, 0); // auto gain off (1 or 0)
// s->set_exposure_ctrl(s, 0); // auto exposure off (1 or 0)
// s->set_agc_gain(s, cameraImageGain); // set gain manually (0 - 30)
// s->set_aec_value(s, cameraImageExposure); // set exposure manually (0-1200)
// s->set_vflip(s, cameraImageInvert); // Invert image (0 or 1)
// s->set_agc_gain(s, 1); // set gain manually (0 - 30)
// s->set_aec_value(s, 1); // set exposure manually (0-1200)
// s->set_vflip(s, 1); // Invert image (0 or 1)
// s->set_quality(s, 10); // (0 - 63)
// s->set_gainceiling(s, GAINCEILING_32X); // Image gain (GAINCEILING_x2, x4, x8, x16, x32, x64 or x128)
// s->set_brightness(s, cameraImageBrightness); // (-2 to 2) - set brightness
// s->set_brightness(s, 0); // (-2 to 2) - set brightness
// s->set_lenc(s, 1); // lens correction? (1 or 0)
// s->set_saturation(s, 0); // (-2 to 2)
// s->set_contrast(s, cameraImageContrast); // (-2 to 2)
// s->set_contrast(s, 0); // (-2 to 2)
// s->set_sharpness(s, 0); // (-2 to 2)
// s->set_hmirror(s, 0); // (0 or 1) flip horizontally
// s->set_colorbar(s, 0); // (0 or 1) - show a testcard
@ -942,8 +944,8 @@ void handleRoot() {
client.write("<br><br>LINKS: \n");
client.write("<a href='/photo'>Capture an image</a> - \n");
client.write("<a href='/img'>View stored image</a> - \n");
client.write("<a href='/rgb'>Capture frame as RGB data</a> - \n");
client.write("<a href='/greydata'>Capture frame as data</a> - \n");
client.write("<a href='/rgb'>Capture frame and display as RGB data</a> - \n");
client.write("<a href='/greydata'>Capture Greyscale frame as data</a> - \n");
client.write("<a href='/stream'>Live stream</a> - \n");
client.write("<a href='/test'>Test procedure</a>\n");
@ -953,7 +955,7 @@ void handleRoot() {
}
// capture and show a jpg image
client.write("<br><a href='/jpg'>"); // make it a link
client.write("<br><br><a href='/jpg'>"); // make it a link
client.write("<img id='image1' src='/jpg' width='320' height='240' /> </a>"); // show image from http://x.x.x.x/jpg
// javascript to refresh the image periodically
@ -1533,6 +1535,38 @@ void handleJpeg() {
} // handleJpeg
// ----------------------------------------------------------------
// resize greyscale image
// ----------------------------------------------------------------
// src_buf: The source image buffer.
// src_width: The width of the source image buffer.
// src_height: The height of the source image buffer.
// dst_buf: The destination image buffer.
// dst_width: The width of the destination image buffer.
// dst_height: The height of the destination image buffer.
void resize_esp32cam_image_buffer(uint8_t* src_buf, int src_width, int src_height,
uint8_t* dst_buf, int dst_width, int dst_height) {
// Calculate the horizontal and vertical resize ratios.
float h_ratio = (float)src_width / dst_width;
float v_ratio = (float)src_height / dst_height;
// Iterate over the destination image buffer and write the resized pixels.
for (int y = 0; y < dst_height; y++) {
for (int x = 0; x < dst_width; x++) {
// Calculate the source pixel coordinates.
int src_x = (int)(x * h_ratio);
int src_y = (int)(y * v_ratio);
// Read the source pixel value.
uint8_t src_pixel = src_buf[src_y * src_width + src_x];
// Write the resized pixel value to the destination image buffer.
dst_buf[y * dst_width + x] = src_pixel;
}
}
}
// ----------------------------------------------------------------
// Capture greyscale image data
// ----------------------------------------------------------------
@ -1564,15 +1598,36 @@ void readGreyscaleImage() {
if (!fb) client.println("Error: Camera image capture failed");
// read image data and calculate average pixel value (as demonstration of reading the image data)
// note: image x = i % WIDTH, image y = floor(i / WIDTH)
unsigned long dataSize = fb->width * fb->height;
unsigned long avrg = 0;
for (int i=0; i < dataSize; i++) { // Note: pixels x position = i % fb->width y position = floor(i / fb->width)
avrg += fb->buf[i];
for (int y=0; y < fb->height; y++) {
for (int x=0; x < fb->width; x++) {
avrg += fb->buf[(y * fb->width) + x];
}
}
client.println("<br>Greyscale Image: The average brightness of the " + String(dataSize) + " pixels is " + String(avrg / dataSize));
client.write("<br><br><a href='/'>Return</a>\n"); // link back
// resize image
int newWidth = 64; int newHeight = 32;
byte newBuf[newWidth * newHeight];
resize_esp32cam_image_buffer(fb->buf, fb->width, fb->height, newBuf, newWidth, newHeight);
// display image
char asciiArt[] = {'@','#','+','!',':','.',' '}; // dark to light characters
const int noAsciiChars = 7; // number of characters
client.write("<br><pre>");
for (int y=0; y < newHeight; y++) {
client.write("</pre><pre>");
for (int x=0; x < newWidth; x++) {
int tpos = map(newBuf[y*newWidth+x],0,255,0,noAsciiChars-1);
client.write(asciiArt[tpos]);
}
}
client.write("<br></pre>");
// close web page
sendFooter(client);
@ -1662,6 +1717,11 @@ void handleTest() {
</script>\n)=====");
// // flip image horizontally
// sensor_t *s = esp_camera_sensor_get();
// s->set_hmirror(s, 1);
/*
// demo of how to request a web page
String page = "http://urlhere.com"; // url to request