kopia lustrzana https://github.com/alanesq/esp32cam-demo
Update ESP32cam-demo.ino
Alan
GitHub
rodzic
7b4242e43e
commit
7462501a9f
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@ -1,3 +1,5 @@
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// new esp32 manager - esp32cam - regular
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/*******************************************************************************************************************
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*
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* ESP32Cam development board demo sketch using Arduino IDE or PlatformIO
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@ -101,8 +103,8 @@
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// -SETTINGS
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// ---------------------------------------------------------------
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char* stitle = "ESP32Cam"; // title of this sketch
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char* sversion = "08Mar25"; // Sketch version
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char* stitle = "BackCam"; // title of this sketch
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char* sversion = "11Mar25"; // Sketch version
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framesize_t FRAME_SIZE_IMAGE = FRAMESIZE_SVGA; // default camera resolution
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// Resolutions available:
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@ -554,12 +556,13 @@ bool cameraImageSettings() {
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s->set_exposure_ctrl(s, 1); // auto exposure on
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s->set_saturation(s, -1); // Slightly decrease saturation
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s->set_contrast(s, -1); // Slightly decrease contrast
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s->set_whitebal(s, 1); // Enable auto white balanc
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s->set_whitebal(s, 1); // Enable white balance
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s->set_awb_gain(s, 1); // Auto White Balance enable (0 or 1)
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s->set_brightness(s, cameraImageBrightness); // (-2 to 2) - set brightness
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} else {
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// Apply manual settings
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s->set_gain_ctrl(s, 0); // auto gain off
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s->set_whitebal(s, 1); // Enable white balance
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s->set_awb_gain(s, 1); // Auto White Balance enable (0 or 1)
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s->set_saturation(s, -1); // Slightly decrease saturation
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s->set_contrast(s, -1); // Slightly decrease contrast
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@ -573,6 +576,12 @@ bool cameraImageSettings() {
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//s->set_vflip(s, 1); // flip image vertically
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//s->set_hmirror(s, 1); // flip image horizontally
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// Discard initial frames to ensure new settings apply
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for (int i = 0; i < 5; i++) {
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camera_fb_t *fb = esp_camera_fb_get();
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esp_camera_fb_return(fb);
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}
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return 1;
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} // cameraImageSettings
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@ -753,10 +762,7 @@ byte storeImage() {
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}
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camera_fb_t * fb = NULL;
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fb = esp_camera_fb_get();
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// there is a bug where this buffer can be from previous capture so as workaround it is discarded and captured again
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esp_camera_fb_return(fb); // dispose the buffered image
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fb = NULL; // reset to capture errors
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fb = esp_camera_fb_get(); // get fresh image
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if (flashRequired){
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delay(100);
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analogWrite(brightLED, currentBrightness); // change LED brightness back to previous state
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@ -851,7 +857,6 @@ void rootUserInput(WiFiClient &client) {
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}
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}
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// if button1 was pressed (toggle io pin B)
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if (server.hasArg("button1")) {
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if (serialDebug) Serial.println("Button 1 pressed");
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@ -1319,10 +1324,7 @@ void readRGBImage() {
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tTimer = millis(); // store time that image capture started
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camera_fb_t * fb = NULL;
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fb = esp_camera_fb_get();
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// there is a bug where this buffer can be from previous capture so as workaround it is discarded and captured again
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esp_camera_fb_return(fb); // dispose the buffered image
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fb = NULL; // reset to capture errors
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fb = esp_camera_fb_get(); // get fresh image
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if (!fb) {
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sendText(client,"error: failed to capture image from camera");
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client.write("<br><a href='/'>Return</a>\n"); // link back
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@ -1470,11 +1472,12 @@ bool handleJPG() {
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camera_fb_t * fb = NULL;
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for (int attempts = 0; attempts < 3; attempts++) {
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delay(30); // help stabilize the frame?
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fb = esp_camera_fb_get();
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if (fb && fb->buf && fb->len > 0) break;
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esp_camera_fb_return(fb);
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if (fb && fb->buf && fb->len > 0) break; // frame has been captured
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if (fb) esp_camera_fb_return(fb);
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fb = NULL;
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delay(100); // Delay before retry
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delay(100); // delay before retry
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}
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if (!fb) {
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@ -1499,7 +1502,7 @@ bool handleJPG() {
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}
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delay(3);
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client.flush();
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client.clear();
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client.stop();
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esp_camera_fb_return(fb);
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@ -1698,35 +1701,44 @@ void readGrayscaleImage() {
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}
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camera_fb_t * fb = NULL;
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fb = esp_camera_fb_get();
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// there is a bug where this buffer can be from previous capture so as workaround it is discarded and captured again
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esp_camera_fb_return(fb); // dispose the buffered image
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fb = NULL; // reset to capture errors
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fb = esp_camera_fb_get(); // get fresh image
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if (flashRequired){
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delay(100);
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analogWrite(brightLED, currentBrightness); // change LED brightness back to previous state
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}
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if (!fb) client.println("Error: Camera image capture failed");
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// read image data and calculate average pixel value (as demonstration of reading the image data)
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// note: image x = i % WIDTH, image y = floor(i / WIDTH)
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unsigned long dataSize = fb->width * fb->height;
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byte minV=255; byte maxV=0;
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for (int y=0; y < fb->height; y++) {
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for (int x=0; x < fb->width; x++) {
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byte pixelVal = fb->buf[(y * fb->width) + x];
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if (pixelVal > maxV) maxV = pixelVal;
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if (pixelVal < minV) minV = pixelVal;
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}
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}
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client.println("grayscale Image: The lowest value pixel is " + String(minV) + ", the highest is " + String(maxV));
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client.write("<br><br><a href='/'>Return</a>\n"); // link back
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// // read image data and calculate average pixel value (as demonstration of reading the image data)
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// // note: image x = i % WIDTH, image y = floor(i / WIDTH)
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// unsigned long dataSize = fb->width * fb->height;
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// byte minV=255; byte maxV=0;
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// for (int y=0; y < fb->height; y++) {
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// for (int x=0; x < fb->width; x++) {
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// byte pixelVal = fb->buf[(y * fb->width) + x];
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// if (pixelVal > maxV) maxV = pixelVal;
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// if (pixelVal < minV) minV = pixelVal;
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// }
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// }
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// client.print("Grayscale image: The lowest value pixel is " + String(minV) + ", the highest is " + String(maxV));
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// client.print("<br>");
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// resize the image
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int newWidth = 115; int newHeight = 42; // much bigger than this seems to cause problems, possible web page is too large?
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byte newBuf[newWidth * newHeight];
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resize_esp32cam_image_buffer(fb->buf, fb->width, fb->height, newBuf, newWidth, newHeight);
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// Get the min and max values in the new resized image
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byte newminV=255; byte newmaxV=0;
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for (int y=0; y < newHeight; y++) {
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for (int x=0; x < newWidth; x++) {
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byte pixelVal = newBuf[(y * newWidth) + x];
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if (pixelVal > newmaxV) newmaxV = pixelVal;
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if (pixelVal < newminV) newminV = pixelVal;
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}
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}
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client.println("Resized image: The lowest value pixel is " + String(newminV) + ", the highest is " + String(newmaxV));
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client.write("<br><br><a href='/'>Return</a>\n"); // link back
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// display image as asciiArt
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char asciiArt[] = {'@','#','S','%','?','*','+',';',':',',','.',' ',' '}; // characters to use
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int noAsciiChars = sizeof(asciiArt) / sizeof(asciiArt[0]); // number of characters available
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@ -1734,8 +1746,8 @@ void readGrayscaleImage() {
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for (int y=0; y < newHeight; y++) {
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client.write("\n"); // new line
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for (int x=0; x < newWidth; x++) {
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int tpos = map(newBuf[y*newWidth+x], minV, maxV, 0, noAsciiChars - 1); // convert pixel brightness to ascii character
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client.write(asciiArt[tpos]);
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int tpos = map(newBuf[y*newWidth+x], newminV, newmaxV, 0, noAsciiChars - 1); // convert pixel brightness to ascii character
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client.write(asciiArt[tpos]);
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}
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}
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client.write("</pre><br>");
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