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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Wed Jul 29 11:35:49 2020
Example: image enhancement
(spatial tone-mapping, local contrast enhancement, color enhancement)
@author: Vasileios Vonikakis (bbonik@gmail.com)
"""
import imageio
import matplotlib.pyplot as plt
from image_enhancement import enhance_image
if __name__=="__main__":
# select an image
filename = "../images/lisbon.jpg"
image = imageio.imread(filename) # load image
# setting up parameters
parameters = {}
parameters['local_contrast'] = 1.0 # no increase in details
parameters['mid_tones'] = 0.5 # middle of range
parameters['tonal_width'] = 0.5 # middle of range
parameters['areas_dark'] = 0.0 # no change in dark areas
parameters['areas_bright'] = 0.0 # no change in bright areas
parameters['saturation_degree'] = 1.0 # no change in color saturation
parameters['brightness'] = 0.5 # increase overall brightness by 50%
parameters['preserve_tones'] = True
parameters['color_correction'] = True
image_enhanced = enhance_image(image, parameters, verbose=False)
# display results
plt.figure(figsize=(7,3))
plt.subplot(1,2,1)
plt.imshow(image, vmin=0, vmax=255)
plt.title('Input image')
plt.axis('off')
plt.tight_layout()
plt.subplot(1,2,2)
plt.imshow(image_enhanced, vmin=0, vmax=255)
plt.title('Enhanced image')
plt.axis('off')
plt.tight_layout()
plt.show()
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