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

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 does the putImageData method do?

A). Extracts pixel data

B). Draws pixel data onto the canvas

C). Modifies pixel data

D). Deletes pixel data

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 method is used to draw pixel data onto the canvas?

A). drawPixelData()

B). putPixelData()

C). displayImageData()

D). putImageData()

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 extract pixel data from a canvas?

A). getImageData()

B). drawPixelData()

C). setPixelData()

D). modifyImageData()

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 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 channel represents the red color in pixel data?

A). Red channel

B). Green channel

C). Blue channel

D). Alpha channel

What type of object does getImageData return?

A). PixelData

B). ImageData

C). CanvasData

D). ImageDataObject