add scaling factor & equation settings

.gitignore

@@ -2,8 +2,6 @@
 
 .vscode/
 *.swp
-static/*
-!static/.gitkeep
 
 # Byte-compiled / optimized / DLL files
 __pycache__/

flask_frontend.py

@@ -6,7 +6,7 @@ import cv2 as cv
 
 app = Flask(
     __name__, 
-    static_folder='./static',
+    static_folder='static',
     static_url_path='/s/'
 )
 
@@ -27,7 +27,8 @@ def ratio_pyro():
         MAX_TEMP=float(request.form['max_temp']),
         MIN_TEMP=float(request.form['min_temp']),
         smoothing_radius=int(request.form['smoothing_radius']),
-        key_entries=int(request.form['legend_entries'])
+        key_entries=int(request.form['legend_entries']),
+        eqn_scaling_factor=float(request.form['equation_scaling_factor'])
     )
 
     img_orig_b64 = base64.b64encode(cv.imencode('.png', img_orig)[1]).decode(encoding='utf-8')

ratio_pyrometry.py

@@ -12,7 +12,8 @@ def rg_ratio_normalize(
     exposure_time, 
     ISO, 
     MIN_TEMP, 
-    MAX_TEMP
+    MAX_TEMP,
+    eqn_scaling_factor
 ):
     # copy image into new array & chop off alpha values (if applicable)
     imgnew = imgarr.copy()[:,:,:3]
@@ -26,18 +27,14 @@ def rg_ratio_normalize(
             r_norm = (px[2] - I_Darkcurrent) * (f_stop ** 2) / (ISO * exposure_time)
 
             # apply camera calibration func
-            temp_C = pyrometry_calibration_formula(g_norm, r_norm, default=MIN_TEMP) 
+            temp_C = pyrometry_calibration_formula(g_norm, r_norm, default=MIN_TEMP) * eqn_scaling_factor
 
             # remove pixels outside calibration range
             if (MIN_TEMP != None and temp_C < MIN_TEMP) or (MAX_TEMP != None and temp_C > MAX_TEMP):
                 temp_C = MIN_TEMP
 
-            # min intensity = 0
-            # pix_i = temp_C - MIN_TEMP 
-
-            temp_new = temp_C - MIN_TEMP 
-            pix_i = temp_new / (MAX_TEMP - MIN_TEMP) * 255
-
+            # scale light intensity to calculated temperature
+            pix_i = scale_temp(temp_C, MIN_TEMP, MAX_TEMP)
             imgnew[i][j] = [pix_i, pix_i, pix_i]
 
     return imgnew
@@ -59,6 +56,15 @@ def pyrometry_calibration_formula(i_ng, i_nr, default=24.0):
     except:
         return default
 
+
+@jit(nopython=True)
+def scale_temp(t, min, max):
+    """
+    Scale pixel temperature (t) to light intensity given min & max temp.
+    """
+    return (t - min) / (max - min) * 255
+
+
 def ratio_pyrometry_pipeline(
     file_bytes,
     # camera settings
@@ -70,12 +76,12 @@ def ratio_pyrometry_pipeline(
     MAX_TEMP: float,
     MIN_TEMP: float,
     smoothing_radius: int,
-    key_entries: int
+    key_entries: int,
+    eqn_scaling_factor: float,
 ):
 
     # read image & crop
     img_orig = cv.imdecode(file_bytes, cv.IMREAD_UNCHANGED)
-    # img = img[y1:y2, x1:x2]
 
     img = rg_ratio_normalize(
         img_orig,
@@ -84,7 +90,8 @@ def ratio_pyrometry_pipeline(
         exposure_time,
         ISO,
         MIN_TEMP,
-        MAX_TEMP
+        MAX_TEMP,
+        eqn_scaling_factor
     )
 
     # build & apply smoothing conv kernel
@@ -107,7 +114,7 @@ def ratio_pyrometry_pipeline(
     key_img_arr = [[]]
     for i in range(key_entries):
         res_temp = MIN_TEMP + (i * step)
-        res_color = (res_temp - MIN_TEMP) / (MAX_TEMP - MIN_TEMP) * 255
+        res_color = scale_temp(res_temp, MIN_TEMP, MAX_TEMP)
         temps.append(math.floor(res_temp))
         key_img_arr[0].append([res_color, res_color, res_color])
 

templates/index.jinja2

@@ -29,13 +29,21 @@
     <h4>Temperature Settings</h4>
 
     <label for="min_temp">Min Temp (°C)</label>
-    <input type="number" name="min_temp" value="60"/>
+    <input type="number" name="min_temp" value="600"/>
     <br>
 
     <label for="max_temp">Max Temp (°C)</label>
     <input type="number" name="max_temp" value="1200"/>
     <br>
 
+    <h4>Pyrometry Equation Settings</h4>
+
+    <img src="/s/pyrometry_eqn.png" id="pyro-eqn" alt="pyrometry calibration formula">
+    <br>
+    <label for="equation_scaling_factor">Equation scaling factor (1 default, 0.55 recommended)</label>
+    <input type="number" name="equation_scaling_factor" value="0.55" step="0.001"/>
+    <br>
+
     <h4>Output Settings</h4>
 
     <label for="smoothing_radius">Smoothing Radius (px)</label>
@@ -66,6 +74,9 @@ imgUpload.onchange = event => {
 #img-preview {
     width: 18rem;
 }
+#pyro-eqn {
+    width: 800px;
+}
 </style>
 
 {% endblock %}