Image-processing Questions

I'm working on a image filter. on the blur filter i need to get data of the neighbor pixels of one pixel to update it's rgb values. to do so i'm

I have written a mpi program for an image processing filter. the main goal of this program is that a given filter is applied to an image file

I am writing the mean blur filter for the filter task in cs50 (more comfortable version). when i tested it with some my pictures, it seemed to

I know it is possible, and a lot faster than using gdi+. however i haven't found any good example of using directx to resize an image and save it

I wrote the following code to convert several images. until img_back, the image was converted correctly, but when this image is saved, only the

I'm trying to write a convolution function in c for my computer vision study. in this function, every pixel in the convolved

I want to hide(invisible watermark) a string into image (283*283) using lsb (least significant bit) algorithm. user gives hidden message(string) ,

I need to iterate through each pixel of the bitmap image, this is my code, but it's too slow bitmap img=......; int

Suppose i have a list of coordinates for lines extracted with cv2.houghlinesp from edge mask obtained from

I am using tess-two for creating an ocr for android. i used the same image for conversion, but the result is very different from the tesseract for

This is inspired by this question. i'm trying to find correlation between two

I have a dataset of images.jpg and a file csv has values bounding box position is top, left, right, bottom. i use ubuntu os and the python

In connection with a business project, i need to find the real distance between two points in the images received from the mobile phone. due to

I want to convert a .cr3 file (camera is a canon powershot sx70 hs) to a .jpg file using python. i found a project on github which actually should

Image color changed after resizing image using jimp const jimp = require('jimp') async function main() { const

I'm developing an application which is about image processing. i used opencv on python and tried to implement a gui with pyqt but using html, css,

I want to create preview thumb for my photos like

I am trying to make a basic image classification project which can differentiate between any two or multiple categories. i have written following

I am trying to remove the white background of few images programmatically and make it transparent. the format of the image is simple, it has a

I have been working on a script which calculates the rotational shift between two images using cv2's phasecorrelate method. i

I have fundus images which are pictures of the retina which have already been processed, and i am looking at and am trying to remove the smaller

I'm working on a personal project using opencv in python. want to detect a sudoku grid. the original image is:

I have two images and a mask. the first image (im1) is my source image, the second (im2) is the image whose region need

Suppose i have a boolean array with shape (nrows,ncols). true represents that i have a defined value (real number) and false represents an

I have about 200gb+ image (about 6000*6000) data on a server. for the portable reason i wish i could resize (cv2) it to (1000*1000), then transfer

I don't want to convert it pixel wise, because of the complexity. is there a library function to convert all white pixels to black at once,

I have made a workflow code to detect the edges of a flame in an image. i could get the edge line. it consists of many pixel points stored in an

I would like to calculate the area of a shape in an image produced from infra red cameras. i have a large set of matrices which i produce

I am trying to identify paragraphs of text in a .pdf document by first converting it into an image then using opencv. but i am

We are working on point clouds and we take a photo each 5 seconds. then, we need to blur some part of the photo (car, person etc ...) with imageai

I am creating a gallery of pictures and i would like to be able to open the full-size image on click. the issue is i am not using

I’ve been looking into opencv and pillow (and imagemagick outside of python, especially

I'm trying to crop an image and plot into matplotlib.pyplotusing python but it shows an error import

I saw a very nice representation of overlaying results on image in a paper and trying to do a similar approach on my data. here ground truth is

I have an rgb image -ndarray- and i want to count the occurrence of some colors like [255,0,0] or [0,0,255] in this image. example of

How i can store imagedata to list in dart ?? so i want to store image to my list but i dont know what type data to put on like there

I am making a script that removes spots from scanned images like noise and contrast, but right now i want to remove stains from images but what is

I need save only one original image in my folder but retrieve different different quality vise. for e.g. this image has 5% quality:

I want to fit a smooth line in a binary image. this image is the result of

A chem student asked me for help with plotting image segmenetation: a stationary camera takes a picture of the experimental setup every second

I have written a python function, which is supposed to draw a circle on an image, where the center point of the circle has been defined using a

I am trying to read information from documents in which the data fields are of the type where you can enter only one letter/digit in a box. i

I am working on training a vgg16-like model in keras, trying to predict a continue / time-to-event value (regression) having as input images, and

I'm really sorry for this basic question, but i'm new to opencv and image processing in general, and couldn't figure this out after fiddling

I want to programmatically overlay an image, e.g. the blissfully familiar windows xp wallpaper:

I draw a rectangle on my image using cv2.rectangle(frame,(x,y),(x1,y1),(0,255,0),2) i would like to draw

I'm getting trouble extracting the lands from this game map.

Consider 4 segmented images or numpy arrays - a,b,c, and d (each pixel is either 0 or a classid at the location of an object in the image). these

I have an image patch of size: (200, 350 , 3) patch:

I have a 16 bit image that i want to convert to a 8 bit image. however i want to do some filtering before that. all values that are below some

I am using the example here to classify

I am trying to apply grayscale and sepia filters on canvas at the time of mousemove. am using canvasrenderingcontext2d.filter for applying the

I'm trying to read an image in unchanged format, do some operations and convert it back to the colored format im =

I'm building a simple device for my lab which actually captures images at specific intervals.

Currently, i am resizing avatars on my server using php's resize_crop_image. the code below takes an image, crops and resizes it so that it's

I want to use only one rectangle to cover the circle in this image:

I want to use some kind of machine learning to measure (the diameter) and count potatoes passing on belt. i've started of with opencv and have

I have multiple images in a folder which i want to process and apply some opencv functions to them. i am trying to find contours of

I have a tensorflow model as a frozen graph, which accepts an image tensor as an input. however, i'd like to add a new input image decoder node to

My objective is a vague one, and as such i don't have any reproducible code for the same. i want to develop a network that i train with

I want to extract the information from a scanned table and store it a csv. right now my table extraction algorithm does the following steps.

I am using opencv to create videos of particular patterns. one of my patterns of size 35x35 looks like this

I am trying to convert a normalised rgb image to hsv or lab colour space. here is the normalisation

I have a huge dataset (2 million) of jpg images in one uncompressed tar file. i also have a txt file each line is the name of the image in tar

I have a js function, it returns the image on canvas that i give in the source and b&w of it side by side, the thing is i am a beginner in js

I tried to use morphological thinning and the output has some noise. i'm using python. the first image is the original image.

As the following piece of code shows, the tensorflow

I am trying to make an image steganography script in python 3.7.2 using the image library in pil. my script to hide one image inside another is

I am trying to find the biggest contour around a car in an image. to find the contour i have learnt the following from the official opencv

I have project where i am going to develop an application using flutter. the app requires face recognition and live image processing. it is

I'm working on bitmap images in android studio, and i would know how to do to detect all red pixels for examples, but not just the pixels that are

I am trying to draw a rectangular contour around a green image i am able to draw the biggest rectangle but unable to draw specifically on

I have about 30 sem (scanning-electron microscope) images like that:

I've followed a guide on blurring image based on colour segmentation:

This piece of code is inside while loop and what i expect is to see the image without lines on it, as lines are applied to img_roi

In my flutter app, i have an image and three sliders, one for hue, one for saturation, and one for

I am working on classification of brain tumors. the dataset is comprised of brain images from various angles, with a border and mask of the tumor

I was wondering if there is a way to extract statistic or values like: brightness, contrast, hue, saturation and sharpness from an image in

I am doing a text segmentation project for school. i need to do horizontal image projection of a binary image. the results that i want are like

Input floor plan image above images are my input floor plan and i need to

I installed the cv2 library via pip install opencv-contrib-python-headless. whenever i try to read an image it it returns none. i tried

My end goal is to achieve somethinng like this:

I want to send an image to backend, but before sending user can select some part of it. and i need to remove unwanted part. below i attached some

I am trying to read an image and then keep only the red channel in the output image. here is what i did: color =

I'm a complete beginner in image processing thing so please do excuse me if my question is foolish .basically i'm trying to develope an image

I recently began studying image processing and took a task where i need to crop an image from mobile instagram screenshot via use of opencv. i

Given an image with semantic map,

I am trying to create a lambda function which accepts an image as multipart/form-data, do some processing on the image and upload it to s3 and

Hi i am working on a small android project using java where one of the so many functions is to detect rectangular (contains data) and crop the

My goal is to identify two leds, one dynamic and the other static and calculate the distance and speed between them. using opencv i thought to

I have an image (front facing man) with 4 different colors (background, hair, skin-tone, and cloth). i used k-mean with k=4, and image is

I am trying to predict on a single image using keras (2.2.4) and tensorflow (1.9.0) as the backend: def enigne(data):

Tensorflow.js cnn example is nice and i decided to train with my custom character images (local images like this

I am using the multi_image_picker plugin to get multiple images. multi_image_picker returns a list<asset> files when selecting

Please read the full question before marking it as duplicate or down-vote it. i am developing an app what can slice through a picture and

I have edited these code, and these are the code: from pyimagesearch.shapedetector import shapedetector import argparse import

I'm trying to read and demosaic raw images in python using the rawpy module. unfortunately the module does not provide simple demosaic method, but

How to copy all the images present in multiple sub-directories to another sub-directories corresponding for them using python? i have the dataset

I'm going to write a python script for loading images from a directory and resizing them, so when i'm loading images from a directory i tried

I have a large image, and i want to process it block by block (512 x 512) at a time. i am currently doing this with loops, but i know that it is