How can you create a grayscale effect using getImageData and putImageData?

What is the range of values for each color channel in pixel data?

A). 0 to 255

B). 0 to 100

C). 0 to 1

D). -255 to 255

Which parameter specifies the rectangular area from which pixel data will be extracted?

A). x-coordinate

B). y-coordinate

C). width

D). height

What is the purpose of the alpha channel in pixel data?

A). To represent brightness

B). To represent transparency

C). To represent color intensity

D). To represent contrast

Which method is used to draw pixel data onto the canvas?

A). drawPixelData()

B). putPixelData()

C). displayImageData()

D). putImageData()

Which channel represents the red color in pixel data?

A). Red channel

B). Green channel

C). Blue channel

D). Alpha channel

Which method is used to blend colors when drawing on the canvas?

A). blendColors()

B). applyBlend()

C). globalAlpha()

D). setAlpha()

What happens if the dimensions of the ImageData object passed to putImageData do not match the canvas?

A). An error occurs

B). The image is resized

C). The image is cropped

D). The image is stretched

Which method is used to manipulate individual pixel values in pixel data?

A). modifyPixel()

B). setPixel()

C). updatePixel()

D). none of the above

What is the purpose of modifying pixel data with getImageData and putImageData?

A). To change canvas size

B). To animate images

C). To manipulate image colors

D). To add text to images

What does the putImageData method do?

A). Extracts pixel data

B). Draws pixel data onto the canvas

C). Modifies pixel data

D). Deletes pixel data