Category "image-processing"

How to convert PNG to JPG in Python?

I'm trying to compare two images, one a .png and the other a .jpg. So I need to convert the .png file to a .jpg to get closer values for SSIM. Below is the code

Use pytesseract OCR to recognize text from an image

I need to use Pytesseract to extract text from this picture: and the code: from PIL import Image, ImageEnhance, ImageFilter import pytesseract path = 'pic.gif'

Keep bins between 5% and 95% of a histogram in OpenCV/Python

I am intending to skip some histograms of an image in the extreme points of the distribution of any gray image. The extreme points to the left are represented b

How to get the location of all text present in an image using OpenCV?

I have this image that contains text (numbers and alphabets) in it. I want to get the location of all the text and numbers present in this image. Also I want to

Reading pattern from file and create a bmp image of that in C

I want to read an text file Using C Language.Here's the file:- You see there is some pattern in the text content on the file. 0 means nothing. 9 means blac

How to automatically determine the background color of an RGBA image with highest contrast?

Background I have a bunch of RGBA images. Imagine icons, logos or similar images that I would like to display. These images can be of any color. Please also not

Threshold for pHash Image Similarity

I am trying find similar images using pHash comparison. pHash of an image is 64-bit number. What I am doing is comparing hashes of two images and then count the

problems with computing normal for organized point cloud

Now I want using PCA method to compute normal for the organized point cloud transformed from the depth image.Here is what I do: pcl::NormalEstimation<pcl::P

problems with computing normal for organized point cloud

Now I want using PCA method to compute normal for the organized point cloud transformed from the depth image.Here is what I do: pcl::NormalEstimation<pcl::P

How to get the color of a pixel in python as fast as possible?

I'm on ubuntu and I want to check every 0.1sec the color of a specific pixel on my screen. How can I do that? I know about PIL but this would need a full scree

View .bin file (YCbCr 4:2:2 format)

I am given a .bin file. I know that the elements in this file correspond to Y Cb Cr values (4:2:2). Also, the data type is 8 bits. How can I view this? I foun

Looking to extract a random color value from an image. Code type doesn't matter

So, I need a tool that will pick a random color from an image and give me the hex code for it. In specific, from an image of a 4-point gradient. I'm hoping to b

I'm facing an error while importing tensorflow lately

I'm trying to import the below packages , it was working previously , today all of sudden I'm unable to install these packages import tensorflow from tensorflow

How to create a Python convolution kernel?

I'm trying to create a convolution kernel, and the middle is going to be 1.5. Unfortunately I keep running in to ideas on how to do that. I'm trying to create s

Error: (-215:Assertion failed) npoints > 0 while working with contours using OpenCV

When I run this code: import cv2 image = cv2.imread('screenshoot10.jpg') cv2.imshow('input image', image) gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY) edg

Random cropping data augmentation convolutional neural networks

I am training a convolutional neural network, but have a relatively small dataset. So I am implementing techniques to augment it. Now this is the first time i a

Histogram based on image as vector graphic

I would like to transform histograms based on images to vector graphics. This could be a start: function preload() { img = loadImage("https://upload.wikim

Improve performance of per-pixel image multiplication with mask and thresholding

I am looking for suggestions to make this algorithm run faster. Using C# and EmguCV (a managed wrapper over OpenCV), I am processing images in real-time, adjust

Python OpenCV skew correction for OCR

Currently, I am working on an OCR project where I need to read the text off of a label (see example images below). I am running into issues with the image skew

Detect and crop a box in .pdf or image as individual images

I have a multi-page .pdf (scanned images) containing handwriting I would like to crop and store as new separate images. For example, in the visual below I would