Concept of projection in image processing

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Rageeni sah
Rageeni sah 2014-4-17
评论： Image Analyst 2017-9-21
Hello, I am working on Image processing.Being new to this field , I don't know the concept of horizontal and vertical projection on an image. Can anyone please give a clear picture of projection in image processing as it would be very helpful for me to proceed forward.
Thanks in advance

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Image Analyst
Image Analyst 2014-4-22
Do you mean just summing the image vertically and horizontally?
verticalProfile = sum(grayImage, 2);
horizontalProfile = sum(grayImage, 1);
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lotus whit
lotus whit 2017-9-20
编辑：lotus whit 2017-9-20
Thank you for your response ,RP(ring projection)and CP(central projection) are
methods for transforming 2-D pattern in to 1-D pattern , RP reduces the
dimensionality by performing projection along circles with different radius
, while CP reduces the dimensionality by performing projection
along lines with different polar angles.

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