image-rotation
Rotate Opencv Matrix by 90, 180, 270 degrees [duplicate]
The above answers are too complex and hog your CPU. Your question was not arbitrary rotation, but ‘Rotate Opencv Matrix by 90, 180, 270 degrees’. UPDATE 30 JUN 2017: This functionality is supported by OpenCV, but not documented: https://github.com/opencv/opencv/blob/master/modules/core/include/opencv2/core.hpp#L1041 void rotate(InputArray src, OutputArray dst, int rotateCode); with enum RotateFlags { ROTATE_90_CLOCKWISE = 0, //Rotate 90 … Read more
Kinetic js drag, drop, resize and rotate image
You were very close, just using some incorrect method names, and as was said before, the cdn needs to change. function update(activeAnchor) { var group = activeAnchor.getParent(); var topLeft = group.get(‘.topLeft’)[0]; var topRight = group.get(‘.topRight’)[0]; var bottomRight = group.get(‘.bottomRight’)[0]; var bottomLeft = group.get(‘.bottomLeft’)[0]; var image = group.get(‘.image’)[0]; var stage = group.getStage(); var anchorX = activeAnchor.getX(); … Read more
Detect if an OCR text image is upside down
Python3/OpenCV4 script to align scanned documents. Rotate the document and sum the rows. When the document has 0 and 180 degrees of rotation, there will be a lot of black pixels in the image: Use a score keeping method. Score each image for it’s likeness to a zebra pattern. The image with the best score … Read more
iOS: Image get rotated 90 degree after saved as PNG representation data
Starting with iOS 4.0 when the camera takes a photo it does not rotate it before saving, it simply sets a rotation flag in the EXIF data of the JPEG.If you save a UIImage as a JPEG, it will set the rotation flag.PNGs do not support a rotation flag, so if you save a UIImage … Read more
Android: How to rotate a bitmap on a center point
I hope the following sequence of code will help you: Bitmap targetBitmap = Bitmap.createBitmap(targetWidth, targetHeight, config); Canvas canvas = new Canvas(targetBitmap); Matrix matrix = new Matrix(); matrix.setRotate(mRotation,source.getWidth()/2,source.getHeight()/2); canvas.drawBitmap(source, matrix, new Paint()); If you check the following method from ~frameworks\base\graphics\java\android\graphics\Bitmap.java public static Bitmap createBitmap(Bitmap source, int x, int y, int width, int height, Matrix m, boolean … Read more
How to rotate the background image in the container?
Very well done and answered here – http://www.sitepoint.com/css3-transform-background-image/ #myelement:before { content: “”; position: absolute; width: 200%; height: 200%; top: -50%; left: -50%; z-index: -1; background: url(background.png) 0 0 repeat; transform: rotate(30deg); }