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edit approved Jan 21, 2016 at 16:49
user3704293
edit approved Jan 21, 2016 at 16:49
user3704293
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#include <SPI.h>
#include <SD.h>
#include <TFT.h>

File bmpImage;
File textFile;

void setup()
{
Serial.begin(9600);
while (!Serial) {
;
}

Serial.print("Initializing SD card...");
if (!SD.begin(53)) {
  Serial.println("initialization failed!");
  return;
}
Serial.println("initialization done.");
int height = 0;
int width = 0;

// Open
bmpImage = SD.open("Circle.bmp", FILE_READ);
textFile = SD.open("test.txt", FILE_WRITE);


bmpImage.seek(0x12);// width in pixel = 16
width = bmpImage.read();
bmpImage.seek(0x16);// height in pixel = 208
height = bmpImage.read();
Serial.println(width);
Serial.println(height);

int imageSize = height*width;

bmpImage.seek(0x36);//skip bitmap header

for(int i = 0; i < height; i ++) {
  for (int j = 0; j < width; j ++) {
    textFile.write(bmpImage.read());
    textFile.write(" ");
  }
  textFile.write("\n");
}

bmpImage.close();
textFile.close();



Serial.println("done write");
}

void loop()
{
  // nothing happens after setup
}

#include <SPI.h>
#include <SD.h>
#include <TFT.h>

File bmpImage;
File textFile;

void setup()
{
Serial.begin(9600);
while (!Serial) {
;
}

Serial.print("Initializing SD card...");
if (!SD.begin(53)) {
  Serial.println("initialization failed!");
  return;
}
Serial.println("initialization done.");
int height = 0;
int width = 0;

// Open
bmpImage = SD.open("Circle.bmp", FILE_READ);
textFile = SD.open("test.txt", FILE_WRITE);


bmpImage.seek(0x12);// width in pixel = 16
width = bmpImage.read();
bmpImage.seek(0x16);// height in pixel = 208
height = bmpImage.read();
Serial.println(width);
Serial.println(height);

int imageSize = height*width;

bmpImage.seek(0x36);//skip bitmap header

for(int i = 0; i < height; i ++) {
  for (int j = 0; j < width; j ++) {
    textFile.write(bmpImage.read());
    textFile.write(" ");
  }
  textFile.write("\n");
}

bmpImage.close();
textFile.close();



Serial.println("done write");
}

void loop()
{
  // nothing happens after setup
}

#include <SPI.h>
#include <SD.h>
#include <TFT.h>

File bmpImage;
File textFile;

void setup()
{
Serial.begin(9600);
while (!Serial) {
;
}

Serial.print("Initializing SD card...");
if (!SD.begin(53)) {
  Serial.println("initialization failed!");
  return;
}
Serial.println("initialization done.");
int height = 0;
int width = 0;

// Open
bmpImage = SD.open("Circle.bmp", FILE_READ);
textFile = SD.open("test.txt", FILE_WRITE);


bmpImage.seek(0x12);// width in pixel = 16
width = bmpImage.read();
bmpImage.seek(0x16);// height in pixel = 208
height = bmpImage.read();
Serial.println(width);
Serial.println(height);

int imageSize = height*width;

bmpImage.seek(0x36);//skip bitmap header

for(int i = 0; i < height; i ++) {
  for (int j = 0; j < width; j ++) {
    textFile.write(bmpImage.read());
    textFile.write(" ");
  }
  textFile.write("\n");
}

bmpImage.close();
textFile.close();



Serial.println("done write");
}

void loop()
{
  // nothing happens after setup
}

#include <SPI.h>
#include <SD.h>
#include <TFT.h>

File bmpImage;
File textFile;

void setup()
{
Serial.begin(9600);
while (!Serial) {
;
}

Serial.print("Initializing SD card...");
if (!SD.begin(53)) {
  Serial.println("initialization failed!");
  return;
}
Serial.println("initialization done.");
int height = 0;
int width = 0;

// Open
bmpImage = SD.open("Circle.bmp", FILE_READ);
textFile = SD.open("test.txt", FILE_WRITE);


bmpImage.seek(0x12);// width in pixel = 16
width = bmpImage.read();
bmpImage.seek(0x16);// height in pixel = 208
height = bmpImage.read();
Serial.println(width);
Serial.println(height);

int imageSize = height*width;

bmpImage.seek(0x36);//skip bitmap header

for(int i = 0; i < height; i ++) {
  for (int j = 0; j < width; j ++) {
    textFile.write(bmpImage.read());
    textFile.write(" ");
  }
  textFile.write("\n");
}

bmpImage.close();
textFile.close();



Serial.println("done write");
}

void loop()
{
  // nothing happens after setup
}
Source Link
Seawish
Seawish
  • 51
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How to read bitmap image on Arduino

I want to convert a bitmap into binary array. My bitmap image is 272*208 pixel monochromatic 1bpp image. I'm confused when the width I get from my image is 16 instead of 272, the height is corrected. And when I skip the bitmap header to get bitmap infomation, I got string of meaningless number in my text file.

#include <SPI.h>
#include <SD.h>
#include <TFT.h>

File bmpImage;
File textFile;

void setup()
{
Serial.begin(9600);
while (!Serial) {
;
}

Serial.print("Initializing SD card...");
if (!SD.begin(53)) {
  Serial.println("initialization failed!");
  return;
}
Serial.println("initialization done.");
int height = 0;
int width = 0;

// Open
bmpImage = SD.open("Circle.bmp", FILE_READ);
textFile = SD.open("test.txt", FILE_WRITE);


bmpImage.seek(0x12);// width in pixel = 16
width = bmpImage.read();
bmpImage.seek(0x16);// height in pixel = 208
height = bmpImage.read();
Serial.println(width);
Serial.println(height);

int imageSize = height*width;

bmpImage.seek(0x36);//skip bitmap header

for(int i = 0; i < height; i ++) {
  for (int j = 0; j < width; j ++) {
    textFile.write(bmpImage.read());
    textFile.write(" ");
  }
  textFile.write("\n");
}

bmpImage.close();
textFile.close();



Serial.println("done write");
}

void loop()
{
  // nothing happens after setup
}