LCDScreenPattern#

class augraphy.augmentations.lcdscreenpattern.LCDScreenPattern(pattern_type='random', pattern_value_range=(0, 16), pattern_skip_distance_range=(3, 5), pattern_overlay_method='darken', pattern_overlay_alpha=0.3, p=1)[source]#

Bases: Augmentation

Creates a LCD Screen Pattern effect by overlaying different line patterns into image.

Parameters:

pattern_type (string, optional) – Types of pattern. Use “random” for random pattern. Select from “Vertical”, “Horizontal”, “Forward_Diagonal”, “Back_Diagonal” and “Cross”.
pattern_value_range (tuple, optional) – Tuple of ints determining the value of the pattern.
pattern_skip_distance_range (tuple, optional) – Tuples of ints determining the distance between lines in each pattern. This is not valid for pattern type of “Cross”.
pattern_overlay_method (string, optional) – The method to overlay pattern into image using OverlayBuilder. The default value is “darken”.
pattern_overlay_alpha (float, optional) – The alpha value for the overlay method uses alpha value.
p (float, optional) – The probability this Augmentation will be applied.

Overview#

The LCDScreenPattern augmentation creates a LCD Screen Pattern effect by overlaying different line patterns into image.

Initially, a clean image with single line of text is created.

Code example:

# import libraries
import cv2
import numpy as np
from augraphy import *


# create a clean image with single line of text
image = np.full((500, 1500,3), 250, dtype="uint8")
cv2.putText(
    image,
    "Lorem ipsum dolor sit amet, consectetur adipiscing elit",
    (80, 250),
    cv2.FONT_HERSHEY_SIMPLEX,
    1.5,
    0,
    3,
)

cv2.imshow("Input image", image)

Clean image:

Example 1#

In this example, a LCDScreenPattern augmentation instance is initialized and the pattern type is set to horizontal lines pattern (pattern_type=”Horizontal”). The value of pattern is set to random value in between 0 and 16 (0,16). The distance between each line pattern is set to random value in between 3 and 5 pixels (3,5). The method to overlay pattern into input image is set to use “darken” method.

Code example:

lcdscreenpattern = LCDScreenPattern(pattern_type="Horizontal",
                                    pattern_value_range = (0,16),
                                    pattern_skip_distance_range = (3,5),
                                    pattern_overlay_method = "darken",
                                    )

img_lcdscreenpattern = lcdscreenpattern(image)
cv2.imshow("lcdscreenpattern", img_lcdscreenpattern)

Augmented image: