Update Assignment-1/mars.png, Assignment-1/color-map.py, README.md files

Assignment-1/color-map.py

+# Rainbow color map
+import numpy as np
+import math
+import numpy as np
+import matplotlib.pyplot as plt
+import matplotlib.image as mpimg
+from matplotlib import cm
+from matplotlib.colors import ListedColormap, LinearSegmentedColormap
+
+
+def cm_rainbow(x):
+    x = min(max(x, 0), 1)
+    offset = 0.8
+    c = (6-2*offset)*x + offset
+    R = max(0, (3-math.fabs(c-4)-math.fabs(c-5))/2.0) # RED
+    G = max(0, (4-math.fabs(c-2)-math.fabs(c-4))/2.0) # GREEN
+    B = max(0, (3-math.fabs(c-1)-math.fabs(c-2))/2.0) # BLUE
+    return R, G, B
+
+mars_gray = mpimg.imread('mars.png')
+
+lum_img = mars_gray[:, :, 0]
+
+viridis = cm.get_cmap('viridis', 8)
+print(viridis(0.56))
+print('viridis.colors', viridis.colors)
+print('viridis(range(8))', viridis(range(8)))
+print('viridis(np.linspace(0, 1, 8))', viridis(np.linspace(0, 1, 8)))
+
+cdict = {'red':   [[0.0,  0.0, 0.0],
+                   [0.2,  0.0, 0.14],
+                   [0.75,  1.0, 1.0],
+                   [1.0,  0.7, 0.7]],
+         'green': [[0.0,  0.0, 0.14],
+                   [0.24, 0.14, 0.24],
+                   [0.3, 0.7, 0.7],
+                   [0.4,  0.3, 0.0],
+                   [1.0,  0.0, 0.0]],
+         'blue':  [[0.0,  1.0, 1.0],
+                   [0.28,  0.0, 0.0],
+                   [1.0,  0.0, 0.0]]}
+
+mars_colormap = LinearSegmentedColormap('testCmap', segmentdata=cdict, N=256)
+mars_red = mars_colormap(lum_img)
+plt.matshow(mars_red)
+
+
+if __name__ == '__main__':
+    r,g,b = cm_rainbow(5)

README.md

@@ -2,6 +2,12 @@
 
 Project and Assignments for scientific visualization
 
-## Quiz 1: 8 Solutions would be pasted here.
+## Quiz 1: mario to luigi
 
-## Quiz 2: TODO:
+## Assignment 1: Color map
+    - https://www.coursera.org/learn/cs-519/lecture/ZYQJs/colormaps
+    - https://www.kennethmoreland.com/color-advice/
+    - https://matplotlib.org/tutorials/introductory/images.html
+    - https://matplotlib.org/3.3.1/tutorials/colors/colormap-manipulation.html
+
+## Quiz 2: No real coding questions