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
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
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
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 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 type of object does getImageData return?
A). PixelData
B). ImageData
C). CanvasData
D). ImageDataObject
Which method is used to blend colors when drawing on the canvas?
A). blendColors()
B). applyBlend()
C). globalAlpha()
D). setAlpha()
What type of object is passed as an argument to putImageData?
A). ImageDataObject
B). CanvasData
C). PixelData
D). ImageData
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 is the purpose of using getImageData and putImageData for image editing applications?
A). To create animations
B). To apply filters and effects
C). To add text to images
D). To resize images