Whether the brightness change while taking a image, change the object size in a image?

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I am having the image A(image of one red ball). lets take A1 as the brightness increased view of A. let take A2 as brightness decreased view of A. I need to compare A1 and A2. while I measure its counter, is there possibility in size change of the red ball.

What I have tried:

by changing threshold I checked. but it shows size of contours with little different. i don't know where I am wrong?

Posted 3-Mar-16 23:19pm

Member 12275007

Updated 4-Mar-16 2:20am

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Philippe Mori · Accepted Answer · 2016-03-04T02:20:00

Solution 1

Usually, you expect size to increase somewhat with brighness...

If brightness is zero, you expect a totally black image and if it is one, you expect a white image...

Usually, the side of a ball would be darker depending on the light source so they would first disappears.

Posted 4-Mar-16 2:20am

Philippe Mori

Updated 4-Mar-16 2:24am

v2