Which method is used to extract pixel data from a canvas?

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

A). blendColors()

B). applyBlend()

C). globalAlpha()

D). setAlpha()

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

A). x-coordinate

B). y-coordinate

C). width

D). height

Which channel represents the red color in pixel data?

A). Red channel

B). Green channel

C). Blue channel

D). Alpha channel

Which of the following is NOT a use case for manipulating image data?

A). Image filtering

B). Text rendering

C). Pixel manipulation

D). Image processing

Which statement is true about the performance of manipulating pixel data?

A). It has no impact on performance

B). It can improve performance

C). It always reduces performance

D). Performance depends on the browser

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

A). drawPixelData()

B). putPixelData()

C). displayImageData()

D). putImageData()

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

What type of object does getImageData return?

A). PixelData

B). ImageData

C). CanvasData

D). ImageDataObject

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

A). modifyPixel()

B). setPixel()

C). updatePixel()

D). none of the above

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

A). Set all RGB channels to the same value

B). Invert the colors

C). Convert to black and white

D). Apply a blur effect