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Old-fashioned photographs from the nineteenth century are not quite black and white and not quite color, but seem to have shades of gray, brown, and blue. This effect is known as sepia, as shown in the figures below. Original Sepia Original Image & Sepia Image Write and test a function named sepia that converts a color image to sepia. This function should first call grayscale to convert the color image to grayscale .A code segment for transforming the grayscale values to achieve a sepia effect follows. Note that the value for green does not change. (red, green, blue) image.getPixel(x, y) %3D if red < 63: red = int(red * 1.1) blue = int(blue * 0.9) elif red < 192: int(red * 1.15) int(blue * 0.85) red = blue = else: red = min(int(red * 1.08), 255) blue = int(blue * 0.93)

Old-fashioned photographs from the nineteenth century are not quite black and white and not quite color, but seem to have shades of gray, brown, and blue. This effect is known as sepia, as shown in the figures below. Original Sepia Original Image & Sepia Image Write and test a function named sepia that converts a color image to sepia. This function should first call grayscale to convert the color image to grayscale .A code segment for transforming the grayscale values to achieve a sepia effect follows. Note that the value for green does not change. (red, green, blue) image.getPixel(x, y) %3D if red < 63: red = int(red * 1.1) blue = int(blue * 0.9) elif red < 192: int(red * 1.15) int(blue * 0.85) red = blue = else: red = min(int(red * 1.08), 255) blue = int(blue * 0.93)

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Edit the sepia function: 

from images import Image

def sepia(image):
"""Converts an image to sepia."""
pass

def grayscale(image):
"""Converts an image to grayscale."""
for y inrange(image.getHeight()):
for x inrange(image.getWidth()):
(r, g, b) = image.getPixel(x, y)
r = int(r * 0.299)
g = int(g * 0.587)
b = int(b * 0.114)
lum = r + g + b
image.setPixel(x, y, (lum, lum, lum))

def main():
filename = input("Enter the image file name: ")
image = Image(filename)
sepia(image)
image.draw()

if __name__ == "__main__":
main()



Old-fashioned photographs from the nineteenth century are not quite black and white and not quite color, but seem to have shades of gray, brown, and blue. This effect is known as sepia, as shown in the figures below. Original Sepia Original Image & Sepia Image Write and test a function named sepia that converts a color image to sepia. This function should first call grayscale to convert the color image to grayscale . A code segment for transforming the grayscale values to achieve a sepia effect follows. Note that the value for green does not change. (red, green, blue) image.getPixel(x, y) %3D if red < 63: int(red * 1.1) int(blue * 0.9) red = blue = elif red < 192: red = int(red * 1.15) blue = int(blue * 0.85) else: min(int(red * 1.08), 255) int(blue * 0.93) red = blue =
Transcribed Image Text:Old-fashioned photographs from the nineteenth century are not quite black and white and not quite color, but seem to have shades of gray, brown, and blue. This effect is known as sepia, as shown in the figures below. Original Sepia Original Image & Sepia Image Write and test a function named sepia that converts a color image to sepia. This function should first call grayscale to convert the color image to grayscale . A code segment for transforming the grayscale values to achieve a sepia effect follows. Note that the value for green does not change. (red, green, blue) image.getPixel(x, y) %3D if red < 63: int(red * 1.1) int(blue * 0.9) red = blue = elif red < 192: red = int(red * 1.15) blue = int(blue * 0.85) else: min(int(red * 1.08), 255) int(blue * 0.93) red = blue =
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