Visual Effects on Images¶

Setup & Test Examples¶

Let us import the relevant libraries and read a few images to play with.

[1]:

import numpy as np
import cv2
from cr import vision
%matplotlib inline

watch = cv2.imread('../../data/images/pocket_watch.jpg')
mountain = cv2.imread('../../data/images/mountain.png')
roses = cv2.imread('../../data/images/roses.jpg')
fighter_jet = cv2.imread('../../data/images/fighter_jet.jpg')
barbara = cv2.imread('../../data/images/barbara.png', 0)
puppy = cv2.imread('../../data/images/puppy.jpg')

[2]:

vision.imshow_multiple_in_row(watch, mountain, roses, fighter_jet, barbara, puppy)

../_images/image_processing_nb_effects_3_0.png

Mirroring Left to Right¶

[3]:

image_modified = vision.effects.mirror_lr(watch)
vision.imshow_multiple_in_row(watch, image_modified)

../_images/image_processing_nb_effects_5_0.png

Mirroring Up to Down¶

[4]:

image_modified = vision.effects.mirror_ud(watch)
vision.imshow_multiple_in_row(watch, image_modified)

../_images/image_processing_nb_effects_7_0.png

Mirroring Diagonally¶

[5]:

image_modified = vision.effects.mirror_x(watch)
vision.imshow_multiple_in_row(watch, image_modified)

../_images/image_processing_nb_effects_9_0.png

Selecting Red Channel¶

[6]:

image_modified = vision.effects.select_red(watch)
vision.imshow_multiple_in_row(watch, image_modified)

../_images/image_processing_nb_effects_11_0.png

[7]:

image_modified = vision.effects.select_red(watch, 50)
vision.imshow_multiple_in_row(watch, image_modified)

../_images/image_processing_nb_effects_12_0.png

Selecting Green Channel¶

[8]:

image_modified = vision.effects.select_green(watch)
vision.imshow_multiple_in_row(watch, image_modified)

../_images/image_processing_nb_effects_14_0.png

[9]:

image_modified = vision.effects.select_green(watch, 50)
vision.imshow_multiple_in_row(watch, image_modified)

../_images/image_processing_nb_effects_15_0.png

Selecting Blue Channel¶

[10]:

image_modified = vision.effects.select_blue(watch)
vision.imshow_multiple_in_row(watch, image_modified)

../_images/image_processing_nb_effects_17_0.png

[11]:

image_modified = vision.effects.select_blue(watch, 50)
vision.imshow_multiple_in_row(watch, image_modified)

../_images/image_processing_nb_effects_18_0.png

Monochrome Image¶

[12]:

image_modified = vision.effects.monochrome(watch)
vision.imshow_multiple_in_row(watch, image_modified)

../_images/image_processing_nb_effects_20_0.png

Embossing¶

[13]:

image_modified = vision.effects.emboss(fighter_jet)
vision.imshow_multiple_in_row(fighter_jet, image_modified)

../_images/image_processing_nb_effects_22_0.png

[14]:

image_modified = vision.effects.emboss(mountain, method='SW')
vision.imshow_multiple_in_row(mountain, image_modified)

../_images/image_processing_nb_effects_23_0.png

[15]:

image_modified = vision.effects.emboss(watch, method='NE')
vision.imshow_multiple_in_row(watch, image_modified)

../_images/image_processing_nb_effects_24_0.png

[16]:

image_modified = vision.effects.emboss(mountain, method='NW')
vision.imshow_multiple_in_row(mountain, image_modified)

../_images/image_processing_nb_effects_25_0.png

Motion Blur¶

[17]:

image_modified = vision.effects.motion_blur(mountain, kernel_size=15)
vision.imshow_multiple_in_row(mountain, image_modified)

../_images/image_processing_nb_effects_27_0.png

[18]:

image_modified = vision.effects.motion_blur(watch, kernel_size=15, horz=False)
vision.imshow_multiple_in_row(watch, image_modified)

../_images/image_processing_nb_effects_28_0.png

Sharpening¶

[19]:

image_modified = vision.effects.sharpen(roses)
differerence = vision.abs_uint8(vision.signed_subtract(roses, image_modified))
vision.imshow_multiple_in_row(roses, image_modified, differerence)

../_images/image_processing_nb_effects_30_0.png

Vignette¶

[20]:

image_modified = vision.effects.vignette(watch, 150)
vision.imshow_multiple_in_row(watch, image_modified)

../_images/image_processing_nb_effects_32_0.png

[21]:

image_modified = vision.effects.vignette(barbara, 120)
vision.imshow_multiple_in_row(barbara, image_modified)

../_images/image_processing_nb_effects_33_0.png

[22]:

image_modified = vision.effects.vignette(puppy, 100)
vision.imshow_multiple_in_row(puppy, image_modified)

../_images/image_processing_nb_effects_34_0.png

[23]:

image_modified = vision.effects.enhance_contrast(watch)
vision.imshow_multiple_in_row(watch, image_modified)

../_images/image_processing_nb_effects_35_0.png

Cartoon¶

[24]:

image_modified = vision.effects.cartoonize(puppy)
vision.imshow_multiple_in_row(puppy, image_modified)

../_images/image_processing_nb_effects_37_0.png

Pixelization¶

[25]:

image_modified = vision.effects.pixelize(puppy, 16)
vision.imshow_multiple_in_row(puppy, image_modified)

../_images/image_processing_nb_effects_39_0.png

Sepia¶

[26]:

image_modified = vision.effects.sepia(puppy)
vision.imshow_multiple_in_row(puppy, image_modified)

../_images/image_processing_nb_effects_41_0.png

Contour¶

[27]:

image_modified = vision.effects.contour(puppy)
vision.imshow_multiple_in_row(puppy, image_modified)

../_images/image_processing_nb_effects_43_0.png

3d embossing¶

[28]:

image_modified = vision.effects.emboss3d(roses, depth=20)
vision.imshow_multiple_in_row(roses, image_modified)

../_images/image_processing_nb_effects_45_0.png