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Author: TheKitty

Pybadge_Thermal_Image_Recording/Processing/ConvertBMPinspector01.pde

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+// ConvertBMPinspector01 - Read and enlarge a modified 32x24 24-bit gray BMP file,
+//                         display an upscaled 256x192 BMP image in 256 colors.
+// Ver. 1 - Fetch filenames and display BMPs in sequence.
+//          Add nav buttons and mouseover pixel temperatures
+//          This sketch does no checking for file compatibility.
+//          Only frm_____.bmp images from the thermal camera sketch will work.
+//          Any other files in the data folder will fail.
+
+import java.util.Date;
+
+byte b[], colorPal[];     // Buffers for input file bytes and for colors
+
+int i, fileCount = 0, BGcolor = 48, colorMap = 1,
+    butnsX = 30, butnsY = 290,
+    offsetX = 153, offsetY = 6,    // These value pairs control where the onscreen features appear
+    numbersX = 40, numbersY = 48,
+    probeX = 190, probeY = 210;
+boolean celsiusFlag = false;
+float fixedPoint[];
+String[] filenames;
+
+void setup() {
+
+  size(480, 360);      // Size must be the first statement
+  background(BGcolor); // Clear the screen with a gray background
+
+  colorPal = new byte[1024];   // Prepare a 1K color table
+  loadColorTable(colorMap, 0); // Load color table, 1 == ironbow palette
+  fixedPoint = new float[5];   // A buffer for appended fixed point values
+
+  String path = sketchPath() + "/data";  // Read from the "/data" subdirectory
+
+  filenames = listFileNames(path);
+  fileCount = filenames.length;
+
+  i = 0;
+  if(fileCount < 1) {
+    println("No files found.  Stopping.");
+    noLoop();
+  } else {
+    loadBMPscreen(i);  // Read in the first frame for inspection
+  }
+}
+
+void draw() {
+  int sampleX, sampleY, pixelVal;
+  float sampleTemp;
+
+  sampleX = (mouseX - offsetX) >> 3;       // Map mouse position to BMP pixel space
+  sampleY = 23 - ((mouseY - offsetY) >> 3);
+
+  noStroke();
+  smooth();
+  fill(BGcolor + 16);
+  rect(probeX, probeY, 180, 40);   // Clear the interactive window space
+
+  if((sampleX >= 0) && (sampleX < 32) && (sampleY >= 0) && (sampleY < 24)) { // Mouse within BMP image bounds?
+    pixelVal = b[54 + (32 * sampleY + sampleX) * 3] & 0xff;                  // Read the 8-bit pixel value
+
+    fill(colorPal[4 * pixelVal + 2] & 0xFF, colorPal[4 * pixelVal + 1] & 0xFF, colorPal[4 * pixelVal + 0] & 0xFF);
+    rect(probeX, probeY, 180, 40);
+    fill(BGcolor);
+    rect(probeX + 10, probeY + 10, 160, 20);   // Draw a colorized frame for the interactive temp readout
+
+    sampleTemp = (float(pixelVal) + 1.0) / 257.0 * (fixedPoint[3] - fixedPoint[1]) + fixedPoint[1];
+    if(!celsiusFlag)
+      sampleTemp = sampleTemp * 1.8 + 32.0;
+
+    fill(255);       // Ready to display white interactive text
+    textSize(11);
+    text(sampleX, probeX + 154, probeY + 19);   // Display X Y position
+    text(sampleY, probeX + 154, probeY + 29);
+    textSize(15);
+    text(sampleTemp, probeX + 60, probeY + 25); // Display temperature
+
+    if(pixelVal ==   0 && fixedPoint[0] < fixedPoint[1]) // Pixel values clipped at bottom limit?
+      text("<", probeX + 40, probeY + 25);               // Show out-of-range indicator
+    if(pixelVal == 255 && fixedPoint[4] > fixedPoint[3]) // Clipped at top?
+      text(">", probeX + 40, probeY + 25);               // Same
+  }
+
+  noSmooth();     // Clear any highlighted buttons
+  stroke(0);
+  noFill();
+  for(sampleX = 0; sampleX < 8; ++sampleX)
+    rect(butnsX + sampleX * 52, butnsY, 51, 24);
+
+  sampleX = mouseX - butnsX;
+  sampleY = mouseY - butnsY;
+  if(sampleX >=0 && sampleX < 416 && sampleY >= 0 && sampleY < 24) { // Mouse over buttons?
+    sampleX = sampleX / 52;                       // Map mouse X to button X space
+    stroke(BGcolor + 64);
+    rect(butnsX + sampleX * 52, butnsY, 51, 24);  // Highlight border around a button
+  }
+}
+
+void keyPressed() {  // Load a different thermal BMP image based on keystroke
+  switch(key) {
+    case '.':   // Next image
+      i = (i + 1) % fileCount;
+      break;
+    case ',':   // Prev Image
+      i = (i + fileCount - 1) % fileCount;
+      break;
+    case '>':   // 16 images forward
+      i = i + 16 < fileCount ? i + 16 : fileCount - 1;
+      break;
+    case '<':   // 16 images back
+      i = i - 16 < 0 ? 0 : i - 16;
+      break;
+    case '/':   // Last image
+      i = fileCount - 1;
+      break;
+    case 'm':   // First image
+      i = 0;
+      break;
+  }
+  loadBMPscreen(i);
+}
+
+void mousePressed() {
+  int sampleX, sampleY;
+
+  sampleX = mouseX - butnsX;
+  sampleY = mouseY - butnsY;
+  if(sampleX >=0 && sampleX < 416 && sampleY >= 0 && sampleY < 24) { // Is mouse over button row?
+    sampleX = sampleX / 52;                       // Map mouse X to button X space
+
+    switch(sampleX) {
+      case 1:   // First image
+        i = 0;
+        break;
+      case 2:   // 16 images back
+        i = i - 16 < 0 ? 0 : i - 16;
+        break;
+      case 3:   // Prev Image
+        i = (i + fileCount - 1) % fileCount;
+        break;
+      case 4:   // Next image
+        i = (i + 1) % fileCount;
+        break;
+      case 5:   // 16 images forward
+        i = i + 16 < fileCount ? i + 16 : fileCount - 1;
+        break;
+      case 6:   // Last image
+        i = fileCount - 1;
+        break;
+      case 7:   // Change color map
+        loadColorTable(colorMap = (colorMap + 1) % 5, 0); // Load color table
+        break;
+      default:  // Toggle C/F
+        celsiusFlag = !celsiusFlag;
+        break;
+    }
+    loadBMPscreen(i);
+  }
+}
+
+void loadBMPscreen(int fileIndex) {
+  int x, y;
+
+  b = loadBytes(filenames[fileIndex]);   // Open a file and read its 8-bit data
+  background(BGcolor);                   // Clear screen
+  enlarge8bitColor();                    // Place colored enlarged image on screen
+
+  for(x = 0; x < 5; ++x) {  // Rebuild 5 float values from next 4*n bytes in the file
+    fixedPoint[x] = expandFloat(b[2360 + (x * 4) + 0], b[2360 + (x * 4) + 1],
+                                b[2360 + (x * 4) + 2], b[2360 + (x * 4) + 3]);
+  }
+  y = ((b[2387] & 0xff) << 24) + ((b[2386] & 0xff) << 16)
+    + ((b[2385] & 0xff) <<  8) +  (b[2384] & 0xff);       // Reassemble a milliseconds time stamp
+
+  textSize(10);        // Print text labels for the frame stats
+  smooth();
+  fill(255);
+  text(filenames[fileIndex], numbersX + 5, numbersY + 40); // Show current filename
+
+  if(celsiusFlag)
+    text("Frame\n\n\nSeconds\n\nDegrees C", numbersX + 5, numbersY + 8);
+  else
+    text("Frame\n\n\nSeconds\n\nDegrees F", numbersX + 5, numbersY + 8);
+
+  text("Approximate temperatures based on 8-bit pixel values", probeX - 42, probeY + 52); // Show approximation disclaimer
+
+  textSize(15);
+  text(fileIndex, numbersX + 5, numbersY + 25);     // Print frame number
+  text(float(y) * 0.001, numbersX, numbersY + 74);  // Print time stamp in seconds
+
+  if(celsiusFlag) {      // Show 3 temps in Celsius
+    fill(255, 128, 64);
+    text(fixedPoint[4], numbersX, numbersY + 108);
+    fill(255, 200, 64);
+    text(fixedPoint[2], numbersX, numbersY + 128);
+    fill(128, 128, 255);
+    text(fixedPoint[0], numbersX, numbersY + 148);
+
+  } else {               // or show them in Farenheit
+    fill(255, 128, 64);
+    text(fixedPoint[4] * 1.8 + 32.0, numbersX, numbersY + 108);
+    fill(255, 200, 64);
+    text(fixedPoint[2] * 1.8 + 32.0, numbersX, numbersY + 128);
+    fill(128, 128, 255);
+    text(fixedPoint[0] * 1.8 + 32.0, numbersX, numbersY + 148);
+  }
+
+  noSmooth();
+  stroke(0);
+  fill(BGcolor + 24);
+  for(x = 0; x < 8; ++x)     // Draw 8 button rectangles
+    rect(butnsX + x * 52, butnsY, 51, 24);
+  for(x = 0; x < 50; ++x) {  // Paint a mini colormap gradient within last button
+    y = int(map(x, 0, 50, 0, 255));
+    stroke(colorPal[4 * y + 2] & 0xFF, colorPal[4 * y + 1] & 0xFF, colorPal[4 * y + 0] & 0xFF);
+    line(butnsX + 365 + x, butnsY + 1, butnsX + 365 + x, butnsY + 23);
+  }
+  smooth();  // Add text labels to buttons
+  fill(255);
+  textSize(15);
+  text("|<      <<       <         >        >>      >|", butnsX + 70, butnsY + 17);
+  if(celsiusFlag)
+    text("C", butnsX + 20, butnsY + 18);
+  else
+    text("F", butnsX + 20, butnsY + 18);
+}
+
+void enlarge8bitColor() {  // Convert a small gray BMP array and plot an enlarged colormapped version
+  int x, y;
+
+  noStroke();
+
+  for(y = 0; y < 24; ++y) {   // Count all source pixels
+    for(x = 0; x < 32; ++x) {
+      int pixMid = b[54 + ((32 * y + x) +  0) * 3] & 0xFF;
+      fill(colorPal[4 * pixMid + 2] & 0xFF, colorPal[4 * pixMid + 1] & 0xFF, colorPal[4 * pixMid + 0] & 0xFF);  // Get color from table
+      rect(offsetX + 8 * x, offsetY + 8 * (23 - y), 8, 8);  // Draw a square pixel, bottom up
+    }
+  }
+}
+
+void loadColorTable(int choiceNum, int offset) {
+  int i, x;
+
+  switch(choiceNum) {
+    case 1:     // Load 8-bit BMP color table with computed ironbow curves
+      for(x = 0; x < 256; ++x) {
+        float fleX = (float)x / 255.0;
+
+        float fleG = 255.9 * (1.02 - (fleX - 0.72) * (fleX - 0.72) * 1.96);
+        fleG = (fleG > 255.0) || (fleX > 0.75) ? 255.0 : fleG;  // Truncate curve
+        i = (int)fleG;
+        colorPal[offset + x * 4 + 2] = byte(i & 0xFF);    // Red vals
+
+        fleG = fleX * fleX * 255.9;
+        i = (int)fleG;
+        colorPal[offset + x * 4 + 1] = byte(i & 0xFF);    // Grn vals
+
+        fleG = 255.9 * (14.0 * (fleX * fleX * fleX) - 20.0 * (fleX * fleX) + 7.0 * fleX);
+        fleG = fleG < 0.0 ? 0.0 : fleG;  // Truncate curve
+        i = (int)fleG;
+        colorPal[offset + x * 4 + 0] = byte(i & 0xFF);    // Blu vals
+      }
+      break;
+    case 2:  // Compute quadratic "firebow" palette
+      for(x = 0; x < 256; ++x) {
+        float fleX = (float)x / 255.0;
+
+        float fleG = 255.9 * (1.00 - (fleX - 1.0) * (fleX - 1.0));
+        i = (int)fleG;
+        colorPal[offset + x * 4 + 2] = byte(i & 0xFF);    // Red vals
+
+        fleG = fleX < 0.25 ? 0.0 : (fleX - 0.25) * 1.3333 * 255.9;
+        i = (int)fleG;
+        colorPal[offset + x * 4 + 1] = byte(i & 0xFF);    // Grn vals
+
+        fleG = fleX < 0.5 ? 0.0 : (fleX - 0.5) * (fleX - 0.5) * 1023.9;
+        i = (int)fleG;
+        colorPal[offset + x * 4 + 0] = byte(i & 0xFF);    // Blu vals
+      }
+      break;
+    case 3:  // Compute "alarm" palette
+      for(x = 0; x < 256; ++x) {
+        float fleX = (float)x / 255.0;
+
+        float fleG = 255.9 * (fleX < 0.875 ? 1.00 - (fleX * 1.1428) : 1.0);
+        i = (int)fleG;
+        colorPal[offset + x * 4 + 2] = byte(i & 0xFF);    // Red vals
+
+        fleG = 255.9 * (fleX < 0.875 ? 1.00 - (fleX * 1.1428) : (fleX - 0.875) * 8.0);
+        i = (int)fleG;
+        colorPal[offset + x * 4 + 1] = byte(i & 0xFF);    // Grn vals
+
+        fleG = 255.9 * (fleX < 0.875 ? 1.00 - (fleX * 1.1428) : 0.0);
+        i = (int)fleG;
+        colorPal[offset + x * 4 + 0] = byte(i & 0xFF);    // Blu vals
+      }
+      break;
+    case 4:    // Grayscale, black hot 
+      for(x = 0; x < 256; ++x) {
+        colorPal[offset + x * 4 + 2] = byte(255 - x & 0xFF);    // Red vals
+        colorPal[offset + x * 4 + 1] = byte(255 - x & 0xFF);    // Grn vals
+        colorPal[offset + x * 4 + 0] = byte(255 - x & 0xFF);    // Blu vals
+      }
+      break;
+    default:    // Grayscale, white hot 
+      for(x = 0; x < 256; ++x) {
+        colorPal[offset + x * 4 + 2] = byte(x & 0xFF);    // Red vals
+        colorPal[offset + x * 4 + 1] = byte(x & 0xFF);    // Grn vals
+        colorPal[offset + x * 4 + 0] = byte(x & 0xFF);    // Blu vals
+      }
+  }
+}
+
+// Rebuild a float from a fixed point decimal value encoded in 4 bytes
+float expandFloat(byte m1, byte m2, byte e1, byte e2) {
+  int fracPart;
+  float floatPart;
+
+  fracPart = ((e2 & 0xff) << 8) + (e1 & 0xff);   // Reassemble 16-bit value
+  floatPart = (float)fracPart / 49152.0;         // Convert into fractional portion of float
+  fracPart = ((m2 & 0xff) << 8) + (m1 & 0xff);   // Reassemble 16-bit value
+  return ((float)fracPart + floatPart) - 1000.0; // Complete reconstructing original float
+}
+
+String[] listFileNames(String dir) {   // Return the filenames from a directory as an array of Strings
+  File file = new File(dir);
+
+  if (file.isDirectory()) {
+    String names[] = file.list();
+    return names;
+  } else    // It's not a directory
+    return null;
+}