image-processing

问题 The Keras ImageDataGenerator class provides the two flow methods flow(X, y) and flow_from_directory(directory) (https://keras.io/preprocessing/image/). Why is the parameter target_size: tuple of integers, default: (256, 256). The dimensions to which all images found will be resized Only provided by flow_from_directory(directory) ? And what is the most concise way to add reshaping of images to the preprocessing pipeline using flow(X, y) ? 回答1: flow_from_directory(directory) generates augmented

问题 I have this image . I am trying to OCR the letters in this image. I am not getting desired result for letters '9' and 'R'. First I cropped these letters, & and executing following command. tesseract 9.png stdout -psm 8 . It is just returning "." OCR for all other letters are working fine but not for these two letters(though, I think their image quality is not that bad). Any suggestion/help is appreciated. 回答1: I've no experience with tesseract myself, but replicating the character and adding

问题 Having an issue getting an image resized on upload. Function // Image Resizer function MakeThumbnail($inputFile, $filepath, $ext, $maxWidth, $maxHeight) { if($ext=="jpg" || $ext=="jpeg" ){ $src = imagecreatefromjpeg($inputFile); }else if($ext=="png"){ $src = imagecreatefrompng($inputFile); }else { $src = imagecreatefromgif($inputFile); } list($width, $height) = getimagesize($inputFile); $newwidth = $maxWidth; $newheight = (strlen($maxHeight)>0) ? $maxHeight : ($height / $width) * $newwidth;

问题 I want to rotate an image at several angles sequentially. I do that using cv2.getRotationMatrix2D and cv2.warpAffine . Having a pair of pixels coordinates [x,y], where x=cols, y=rows (in this case) I want to find their new coordinates in the rotated images. I used the following slightly changed code courtesy of http://www.pyimagesearch.com/2017/01/02/rotate-images-correctly-with-opencv-and-python/ and the explanation from Affine Transformation to try to map the points in the rotated image :

问题 I want to rotate an image at several angles sequentially. I do that using cv2.getRotationMatrix2D and cv2.warpAffine . Having a pair of pixels coordinates [x,y], where x=cols, y=rows (in this case) I want to find their new coordinates in the rotated images. I used the following slightly changed code courtesy of http://www.pyimagesearch.com/2017/01/02/rotate-images-correctly-with-opencv-and-python/ and the explanation from Affine Transformation to try to map the points in the rotated image :

问题 I have been searching for a technique to remove the background of a any given image. The idea is to detect a face and remove the background of the detected face. I have finished the face part. Now removing the background part still exists. I used this code. import cv2 import numpy as np #== Parameters BLUR = 21 CANNY_THRESH_1 = 10 CANNY_THRESH_2 = 200 MASK_DILATE_ITER = 10 MASK_ERODE_ITER = 10 MASK_COLOR = (0.0,0.0,1.0) # In BGR format #-- Read image img = cv2.imread('SYxmp.jpg') gray = cv2

问题 I have been searching for a technique to remove the background of a any given image. The idea is to detect a face and remove the background of the detected face. I have finished the face part. Now removing the background part still exists. I used this code. import cv2 import numpy as np #== Parameters BLUR = 21 CANNY_THRESH_1 = 10 CANNY_THRESH_2 = 200 MASK_DILATE_ITER = 10 MASK_ERODE_ITER = 10 MASK_COLOR = (0.0,0.0,1.0) # In BGR format #-- Read image img = cv2.imread('SYxmp.jpg') gray = cv2

问题 Given this image: I'd like to make it such that it will rotate and stretch to fully fit in the bounding box with no whitespace on the outside of the largest rectangular box. It should also account for worse perspective case, like in the links I list later on. Basically, while it is not noticeable, the rectangle is rotated a little bit, and I'd like to fix that distortion. However, I got an error when attempting to retrieve the four points of the contour. I have made sure and utilized contour

问题 Given this image: I'd like to make it such that it will rotate and stretch to fully fit in the bounding box with no whitespace on the outside of the largest rectangular box. It should also account for worse perspective case, like in the links I list later on. Basically, while it is not noticeable, the rectangle is rotated a little bit, and I'd like to fix that distortion. However, I got an error when attempting to retrieve the four points of the contour. I have made sure and utilized contour

问题 Given this image: I'd like to make it such that it will rotate and stretch to fully fit in the bounding box with no whitespace on the outside of the largest rectangular box. It should also account for worse perspective case, like in the links I list later on. Basically, while it is not noticeable, the rectangle is rotated a little bit, and I'd like to fix that distortion. However, I got an error when attempting to retrieve the four points of the contour. I have made sure and utilized contour