I do some image processing with OpenCV. I want to invert this bitmap (black to white, white to black) and i have some problems with it. I got this Bitmap after doing this: // to grey Imgproc.cvtColor(mat, mat, Imgproc.COLOR_RGB2GRAY, 4);…
I have two microscope images. One in gray scale, one in red. I can merge these in photoshop, imagej, etc. I want to merge these two in opencv so I can perform this operation on many samples. So far I've…
I want to adjust the brightness of an image to a certain value in OpenCV. For example, consider this image: I calculate the brightness with: import cv2 img = cv2.imread(filepath) cols, rows = img.shape brightness = numpy.sum(img) / (255 *…
I'm running a project that will do more or less the same as CameraRaw/Photoshop does. The thing is, how do I handle multiple mods on the image matrix? let me explain, I read the image Using OpenCV function, and I…
I'm trying to crop an object from an image, and paste it on another image. Examining the method in this answer, I've successfully managed to do that. For example: The code (show_mask_applied.py): import sys from pathlib import Path from helpers_cv2…
I have a collection of cv::Mat objects of different sizes. I want to them all to have the same number of columns as the widest matrix in the collection. Matrices that have less columns should be padded to the right…
I am trying to add some blur brush stroke with OpenCV If I use cv.add or cv.addweighted, I only got half of the red color (look pink), but I want the red to cover the underlying picture, not blend. If…
I wrote a program that uses the openCV and boost::filesystem libraries, and the program crops images to fit the object in the image. (Photoshop has already been used to replace most of the backgrounds with white). However, I have thousands…
I am trying to make a transparent image and draw on it, and after I will addWeighted over the base image. How can I initialize fully transparent image with width and hight in openCV python? EDIT: I want to make…
I have an image like below. It has black border/regions in the top and right side of the image. I want to be able to find these regions like shown in the 2nd images. Note these regions should be always…