image-rotation

I have a BufferedImage and I want to rotate the image (Picture) around the Y axis in Java with theta angle not affine transform. The rotation will be like the image below (the rectangle will be an image). I can do this by rotating each pixel of the image and drawing the image. Because I have to rotate a lot of images, I don't think this is the best idea. How I will do this transformation? Thanks for your help. Generally, you'll want to find the inverse transform from your output pixel space into the input pixel's space. You then iterate over the output pixels, transforming them into the input

I was developing an application to apply effects/rotation/pinch to zoom in-out functionality on image. I have downloaded demo application from https://github.com/Grishu/ImageEffects . It works well, now my problems/questions are as below: Apply multiple effects on images with progress change value (e.g. First apply brightness effect and result of this apply another effect say "contrast".) - problem: in code effect always apply on original image. So change in code to apply effect on final image like, if(isApplyEffectOnOriginalImage){//call first time only mEffect.apply(mTextures[0], mImageWidth

All I want rotate image in particular angle as like below image. I have code for rotation but it rotate 360 degree but I want it only for particular degrees and get the selected number which is upper side of dial. below is my code. My custom View this work fine but lake of perfomance. import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.PointF; import android.graphics.Rect; import android.util.AttributeSet; import android.util.Log; import android.view

I have one UIImageView having an image of an arrow. When user taps on the UIView this arrow should point to the direction of the tap maintaing its position it should just change the transform. I have implemented following code. But it not working as expected. I have added a screenshot. In this screenshot when i touch the point upper left the arrow direction should be as shown.But it is not happening so. -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{ UITouch *touch=[[event allTouches]anyObject]; touchedPoint= [touch locationInView:touch.view]; imageViews.transform =

In order to better understand how image manipulation works, I've decided to create my own image rotation algorithm rather than using cv2.rotate() However, I'm encountering a weird picture cropping and pixel misplacement issue. I think it may have something to do with my padding, but there may be other errors import cv2 import math import numpy as np # Load & Show original image img = cv2.imread('Lena.png', 0) cv2.imshow('Original', img) # Variable declarations h = img.shape[0] # Also known as rows w = img.shape[1] # Also known as columns cX = h / 2 #Image Center X cY = w / 2 #Image Center Y

Please read the whole question carefully before marking duplicate or closing it I want to rotate a image(specifically arrow image ) around its center point of base. e.g. At start my image will be like second hand in a clock on 9. And suppose if I rotate that image by 30 degree, it should look like clock second hand on 10 and if 120 degree the clock second hand on 1. So I want to rotate that image around it's center(along x axis) of base. So what should I pass as pivot(X & Y) if I first code imageView.setPivotX(1f); imageView.setPivotY(1f); imageView.setRotation(-30); or second code Matrix