import bpy
D = bpy.data

# Specify your image here, open it inside Blender Image Editor panel
image_file = 'raspberrypi_logo_mini_blanc.png'

img = D.images[image_file]
pixels = list(img.pixels)
grouped_list = [pixels[ipx:ipx+4] for ipx in range(0, len(pixels), 4)]

# Get width and height of image (in pixel)
w = width = img.size[0]  
h = height = img.size[1]

print("------LENGTH------")
print( len(img.pixels)//4) 
print("------PIXEL------")
print(pixels)
print("---GROUPED-PIXEL---")
print(len(grouped_list))

# Create LIST of GRID XY value
rowColList=[]

for i in range(height):
    for j in range(width):
        rowColList.append(i)
        rowColList.append(j)

# SPLIT the LIST of XY
origList = rowColList
splitList = [origList[i:i+2] for i in range(0,len(origList),2)]

for number in range(len(grouped_list)):
    
    # separate RGBA into each own variables
    r = grouped_list[number][0]
    g = grouped_list[number][1]
    b = grouped_list[number][2]
    a = grouped_list[number][3]

    # separate XY coordinate    
    x=splitList[number][0]
    y=splitList[number][1]
    
    # create cube at location XY
    bpy.ops.mesh.primitive_cube_add(location=(x-width/2, y-width/2, 0))
    selectedObject = bpy.context.selected_objects
    selectedObject[0].name = 'pixelcube.%s' % number
    selectedObject[0].scale = 0.45, 0.45, 0.45
  
    # add material with RGB color as sampled for every pixel
    mat = bpy.data.materials.new('pixelColor')
    mat.diffuse_color = (r,g,b)
    mat.diffuse_shader = 'LAMBERT'
    mat.diffuse_intensity = 1.0
    #mat.emit=0.5
 
    bpy.context.object.data.materials.append(mat)
    
    print ('PixelCube {number} created at:'.format(number=number), x, y, ', with RGB color', r, g, b)