Information in images 0.0 / 5 ? PhysicsInformation in imagesASOCR Created by: apple87Created on: 25-04-15 14:20 How many bits in a byte? 8 1 of 13 What is the formula used to calculate the number of bits? Number of alternatives= log2(number of alternatives) 2 of 13 What is the formula to calculate the Number of alternatives? Number of alternatives= 2Number of bits 3 of 13 How can the brightness of an image be changed? By adding a fixed positive value to the binary numbers which makes the image brighter but doesn't change the contrast. 4 of 13 How can the contrast of an image be changed? Multiply the binary numbers by a fixed value, increases the contrast an brightness. 5 of 13 What does adding false colour do? Highlights features. 6 of 13 How can noise in an image be reduced? Replace pixles with the median of it's eight neighbours. 7 of 13 What does noise look like in in image? A bright or dark spot. 8 of 13 What is the result of reducing noise? Any odd values are removed and the image is smoother. 9 of 13 What is the Laplace rule used for? To find edges. 10 of 13 How do you apply the Laplace rule? Muliply a pixle by four, then subract the value of the pixels immediately above, below, to the left and to the right. 11 of 13 When will the Laplace rule highlight an edge? If there is a steep change in brightness. 12 of 13 If the change in brightness is gradual what will happen when the Laplace rule is applied? It will smooth the change in brightness, making it less noticeable. 13 of 13
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