Returns true | Computer Science homework help

Returns True after converting the image to monochrome.

All plug-in functions must return True or False. This function returns True

because it modifies the image. It converts the image to either greyscale or

sepia tone, depending on the parameter sepia.

If sepia is False, then this function uses greyscale. For each pixel, it computes

the overall brightness, defined as

0.3 * red + 0.6 * green + 0.1 * blue.

It then sets all three color components of the pixel to that value. The alpha value

should remain untouched.

If sepia is True, it makes the same computations as before but sets green to

0.6 * brightness and blue to 0.4 * brightness.

Parameter image: The image buffer

Precondition: image is a 2d table of RGB objects

Parameter sepia: Whether to use sepia tone instead of greyscale

Precondition: sepia is a bool

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