image-manipulation

来源： https://stackoverflow.com/questions/2477045/storing-and-retrieving-images-from-database-using-python

来源： https://stackoverflow.com/questions/2477045/storing-and-retrieving-images-from-database-using-python

来源： https://stackoverflow.com/questions/2477045/storing-and-retrieving-images-from-database-using-python

来源： https://stackoverflow.com/questions/2477045/storing-and-retrieving-images-from-database-using-python

来源： https://stackoverflow.com/questions/2477045/storing-and-retrieving-images-from-database-using-python

来源： https://stackoverflow.com/questions/2477045/storing-and-retrieving-images-from-database-using-python

问题 Is it possible to add a watermark when someone downloads an image from your website? If yes, what's the best way to do it? Thanks in advance. 回答1: If you mean when Right Click -> Save ing it, thats not possible I'm afraid. If you generally mean that you have a dedicated download button or link, You could make It would redirect the request through a PHP file that will add the needed watermark and generate a new image file for download. 回答2: I would suggest using a function imagecopymerge() to

问题 I would like to know how I could remove entire rows from an image, preferably based on the color of the row? Example: I have an image that is 5 pixels in height, the top two rows and the bottom two rows are white and the middle row is black. I would like to know how I could get PIL to identify this row of black pixels, then, remove the entire row and save the new image. I have some knowledge of python and have so far been editing my images by listing the result of "getdata" so any answers

问题 I've to make a parallel image processing script in java, the idea is to divide the images into tiles of any size, process them, and reassemble the final image. For now i've created a function: public static BufferedImage readImg (String path, int startx, int starty, int w, int h) that returns the region of an image as BufferedImage, then i'll process it and i want to place that region in the correct position of the final image. So i've tried to make a function writeImg that uses replacePixels

问题 I've to make a parallel image processing script in java, the idea is to divide the images into tiles of any size, process them, and reassemble the final image. For now i've created a function: public static BufferedImage readImg (String path, int startx, int starty, int w, int h) that returns the region of an image as BufferedImage, then i'll process it and i want to place that region in the correct position of the final image. So i've tried to make a function writeImg that uses replacePixels