How to create a image matrix of pixels showing there value

asked 2019-06-28 18:55:15 -0500

davidpzed gravatar image

Hi I have a project where I would like to zoom in on an EOI (pointed to by mouse) on a displayed image and have a pop up image of say 21 x 21 pixels around the EOI showing their value and and color (color or grayscale) with the text of the value in the reverse color scheme. Basically like shown here https://docs.opencv.org/2.4/_images/H... The project is in C++ using MSVC. It has a feature that allows you to zoom into an image called Image Watch, I would like to have this as an output.

Any help would be great

Cheers Dave

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Comments

Set an roi (21x21) around the mouse position in the source image. Decide on a wd & ht value for each pixel in the matrix of pixels. Make this matrix image size (21 * wd, 21 * ht) For each pixel in the roi, draw a filled rectangle in the matrix image using the pixel's value and draw the text of the pixels value within this filled rect using a color that is 255 - value

Chris gravatar imageChris ( 2019-06-29 10:41:06 -0500 )edit

Hi Chrs Thanks for help, much appreciated. Will try implementing your suggested solution over the course of the week (new to opencv)

Cheers Zed

davidpzed gravatar imagedavidpzed ( 2019-06-29 18:14:06 -0500 )edit