. Reducing an image to half its size means the new image is half as wide as the

Question

. Reducing an image to half its size means the new image is half as wide as the original and half as high. It would have only one-fourth as many pixels as the original. Each pixel in the new smaller image corresponds to a 2 x 2 block of pixels in the original image. In the illustration below, the 8 x 8 block of pixels has been reduced to half its size (a 4 x 4 block of pixels). The intensity of each pixel in the new image is the average of the intensities of the four corresponding pixels in the original image.

Explanation / Answer

It seems you require explanation for above statements concerning image resize. I will use an example to illustrate the same.

Consider an original image (A) of size 8 x 8. As shown in table below this image has 64 pixels.

Reduce / Resize the original image to an image (B) of half the original width / height (i.e. 4 x 4). As shown in table below this image has 16 pixels.

P01 P02 P03 P04 P05 P06 P07 P08 P09 P10 P11 P12 P13 P14 P15 P16 P17 P18 P19 P20 P21 P22 P23 P24 P25 P26 P27 P28 P29 P30 P31 P32 P33 P34 P35 P36 P37 P38 P39 P40 P41 P42 P43 P44 P45 P46 P47 P48 P49 P50 P51 P52 P53 P54 P55 P56 P57 P58 P59 P60 P61 P62 P63 P64

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