pixel - Smallest dot in a bitmap image, 1 bit - Can only store 0 or 1, byte - Group of 8 bits, RGB - Colour model using Red, Green and Blue light, bitmap - Image made from pixels arranged in a grid, resolution - Number of pixels across and down an image, colour depth - Number of bits used for each pixel’s colour, bit depth - Another term for number of bits per pixel, width - Number of pixels from left to right, height - Number of pixels from top to bottom, file size - Amount of storage the image file uses (in bytes, KB, MB), megapixel - About one million pixels, compression - Reducing the file size of an image, lossy - Compression that removes some data and reduces quality, lossless - Compression that keeps all the original data, metadata - Extra information stored with the image (e.g. width, height, date), red - RGB value 255,0,0, green - RGB value 0,255,0, blue - RGB value 0,0,255, white - RGB value 255,255,255, black - RGB value 0,0,0, yellow - RGB value 255,255,0, cyan - RGB value 0,255,255, magenta - RGB value 255,0,255, grey - RGB value 128,128,128 (equal amounts of R, G and B),

RGB and image representation

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