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

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

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

A). x-coordinate

B). y-coordinate

C). width

D). height

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

A). modifyPixel()

B). setPixel()

C). updatePixel()

D). none of the above

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

A). blendColors()

B). applyBlend()

C). globalAlpha()

D). setAlpha()

What type of object does getImageData return?

A). PixelData

B). ImageData

C). CanvasData

D). ImageDataObject

Which channel represents the red color in pixel data?

A). Red channel

B). Green channel

C). Blue channel

D). Alpha channel

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

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 is passed as an argument to putImageData?

A). ImageDataObject

B). CanvasData

C). PixelData

D). ImageData