How do I crop an image in Java?

I want to crop an image manually using the mouse. Suppose the image has some text, and I want to select some text from an image, then for that purpose I want to crop that area by using the mouse.

Cross-browser JS inconsistencies

I have a PHP script that allows image upload. I modified it slightly to load newly uploaded image into a modal window in order to allow manual crop, if needed. It seems I got it working in FireFox...

OpenCV detect if points lie along line/plane

I am working on a form of autocalibration for an optics device which is currently performed manually. The first part of the calibration is to determine whether a light beam has illuminated the set...

PIL paste image with alpha appears faded

I am working with multiple images that I would like to stack on top of each other to create a single image. However, in working with them, I'm noticing that if the image already has transparency...

R Crop no-data of a raster

I would like to crop the no-data part of some rasters (example of the image in 1 where no-data is in black) without defining the extent manually. Any idea?

Cropping a captured image exactly to how it looks in AVCaptureVideoPreviewLayer

I have a photo app that is using AV Foundation. I have setup a preview layer using AVCaptureVideoPreviewLayer that takes up the top half of the screen. So when the user is trying to take their...

Having both portrait and landscape images auto-crop to fit a thumbnail

I've been making a responsive image thumbnail gallery for a portfolio using this "Tutorial". This tutorial is quite complete and pedagogic (I'm a big noob), but doesn't cover one part: The...

laravel and image intervention, how to convert all images to jpeg and save from Input::file?

I have read the documentations on image intervention implementation on laravel and i did it successfully i have also read the documentations on how to use the intervention but i can't seems to...

How to transition smoothly from translucent to opaque UINavigationBar iOS?

I'm running into problems reconfiguring the UINavigationBar on iOS 7 and 8 when transitioning between views. My application currently contains the following UIViewController flow: VC1 --> VC2 -->...

ImageMagick: No decode delegate for this image format `' @ error/constitute.c/ReadImage/504

Problem: ImageMagick convert is unable to crop image. It looks like it doesn't recognize the image type? What I've Tried: I've searched around online and I've seen several similar issues but not...

how to read multipart/form-data in flask

I'm having trouble reading data in flask that is posted via XMLHttpRequest. I'm using this jquery plugin to crop the image and upload to...

Can I execute “Pathfinder > Crop” from the Pathfinder panel and NOT the “Effects > Pathfinder” menu?

TLDR: I need to run Pathfinder > Crop on all art in a file that has a clipping mask applied but can’t seem to get Crop to fire correctly. UPDATE: After HOURS of chipping away at this I came to...

Highly inconsistent OCR result for tesseract

This is the original screenshot and I cropped the image into 4 parts and cleared the background of the image to the extent that I can possibly do but tesseract only detects the last column here...

How to crop bottom part of an image(part with subtitle) in python

I am doing subtitle extraction from videos in python.I have used opencv in python to do this.I have divided it into frames and for each frame as image which will be stored in my disk, i am doing...

How to crop or remove white background from an image

I am trying to compare images using OpenCV and Python. Consider these images: Both feature an identical pair of shoes, set to a white background. The only difference being that the first has...

Data augmentation for training dataset in gaussian process regression with python

I am working on a Gaussian Process Regression problem with scikit-learn. In order to perform prediction I have a dataset that contains 10 different positions of a sensor in 3D coordinates:...

Arduino code "... was not declared in this scope" with STM32

I want to use arduino code with STM32 in Arduino IDE, but I get an error: sketch_apr28a:509: error: 'REG_PMC_PCER1' was not declared in this scope sketch_apr28a:510: error: 'REG_PIOC_PDR' was not...

Reading low resolution image with pytesseract

I'm trying to read off some stats off the cropped (manually) sections of tables in pdf files. Here is the image I'm trying to process The current result I get has most of the numbers but not all...

Crop a pdf page to content

Using Python, is it possible to crop a pdf page to the content as shown in the image below where the task is achieved in Inkscape? The bounding area for the content should be found...

Possible reasons for OpenCV HaarCascade insuffiecient samples

Info Im am currently trying to train a HaarCascade classifier. I got to a point where the training process is working and I was able to train a at least "working" classifier. Which will detect a...

Disable `sticky` and `fixed` CSS (for full webpage screenshot)

Background: I'm using a tool to take an automated, "full page" screenshot of a webpage. It does this, by scrolling through a web page, taking screenshots, and stitching them together. (no prizes...

SVG CSS classes overriding each other in d3

I have a d3 project where SVG "icons" (exported from Adobe Illustrator, if that matters) are embedded in a d3 container. (Project structure is visible in the devtools screen grab below) A problem...

pytorch sliding window with unfold & fold

I'm trying to use a simple ssd that was trained on 300x300 data with annotated bounding boxes. If I crop the images manually, it works correctly but with full size images it fails (obviously) due...

detect a table part from entire image in python

I have an image of size 3500x5000, now I want to detect only the table part from the entire image and crop and rotate it if it is not straight for OCR processing. After all search, I get an idea...

“TypeError: null is not an object (Evaluating ‘RCTVideoInstance.Constants’)”

I’m having a problem where I get this error: “TypeError: null is not an object (Evaluating ‘RCTVideoInstance.Constants’)” for the react-native-video library. I am trying it on an...

Fine tuning a model in transfer learning

I am working on a deep learning model for "Age Invariant Face detection". I started with preprocessing the data which included face cropping via MTCNN, image contrast correction and sharpening. I...

Improving MLKit Object Detection

Question: Using MLKit, I am familiar with how to customize the classifier model, but is there any way to customize or retrain the object detection model? Background I'm working on a robotics...

Is there a precise way to measure text size in a specific font in Python (3.7)?

I've been through several questions and unsatisfying answers about this. Pillow can use ttf fonts but draw.textsize(text,font) and font.getsize(text) return the same wrong...

Flutter: center overflowed image in Stack

I have an image and I want to place it in the Stack widget which has smaller size than initial image. Also I need to center this image inside smaller widget. For now I found one approach which...

Python text extraction from a video game screenshot

I am building a discord bot with discord.py for the video game Diablo 2. One of the functionalities requires the bot to extract the name and properties of items from Diablo 2 screenshots. I am...