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Commit 594cfa9

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RGBHistogram
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/**
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* Example on how to use the RGBHistogram class.
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* It computes the (binned) frequency histogram of R, G, B values in an image.
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*/
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#define CAMERA_MODEL_M5STACK_WIDE
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#define FRAME_SIZE FRAMESIZE_QVGA
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#define NUM_BINS 16
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#include <EloquentArduino.h>
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#include <eloquentarduino/vision/camera/ESP32Camera.h>
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#include <eloquentarduino/vision/processing/RGBHistogram.h>
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Eloquent::Vision::Camera::ESP32Camera camera(PIXFORMAT_RGB565);
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Eloquent::Vision::Processing::RGBHistogram<NUM_BINS> hist;
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/**
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* Function prototype
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*/
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void printHistogram(uint16_t *hist, char bar = '|', uint8_t divisor = 10);
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/**
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*
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*/
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void setup() {
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Serial.begin(115200);
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camera.begin(FRAME_SIZE);
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delay(4000);
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}
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/**
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*
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*/
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void loop() {
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camera_fb_t *frame = camera.capture();
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// actually compute histogram
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hist.update(frame->buf, frame->len);
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// the hist object has the attributes rHistogram, gHistrogram, bHistogram
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// that contain the calculated histograms
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//printHistogram(hist.gHistogram);
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delay(4000);
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}
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/**
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* Print histogram on the serial monitor
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*/
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void printHistogram(uint16_t *hist, char bar, uint8_t divisor) {
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// for each bin
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for (uint8_t i = 0; i < NUM_BINS; i++) {
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Serial.printf("%-2d ", i);
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// print row proportional to its height
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for (uint16_t j = hist[i] / divisor; j > 0; j--) {
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Serial.print(bar);
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}
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Serial.println();
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}
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}
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//
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// Created by Simone on 07/09/2021.
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//
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#ifndef ELOQUENTARDUINO_RGBHISTOGRAM_H
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#define ELOQUENTARDUINO_RGBHISTOGRAM_H
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class RGBHistogram {
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};
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#endif //ELOQUENTARDUINO_RGBHISTOGRAM_H

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