alpha

问题 This question already has answers here : How can I make an Image with a transparent Backround in Pygame? (2 answers) How do I blit a PNG with some transparency onto a surface in Pygame? [duplicate] (4 answers) pygame image background does not match main background (1 answer) How to make a surface with a transparent background in pygame (3 answers) Closed 3 months ago . I have read the top 20 posts relating to this issue here, read many examples on Google, tried using .convert() , .convert

问题 This question already has answers here : How can I make an Image with a transparent Backround in Pygame? (2 answers) How do I blit a PNG with some transparency onto a surface in Pygame? [duplicate] (4 answers) pygame image background does not match main background (1 answer) How to make a surface with a transparent background in pygame (3 answers) Closed 3 months ago . I have read the top 20 posts relating to this issue here, read many examples on Google, tried using .convert() , .convert

问题 everybody. I'm trying to place ".png" image over the video capture using java and opencv. I performed the tutorial from the official opencv java website http://opencv-java-tutorials.readthedocs.io/en/latest/04-opencv-basics.html In this tutorial everything works fine with png image from the tutorial. But when i try to load my own png image with alpha channel, i get the wrong result. Png image displays with white spaces. Here is the print screens of video capture with both images: correct

问题 everybody. I'm trying to place ".png" image over the video capture using java and opencv. I performed the tutorial from the official opencv java website http://opencv-java-tutorials.readthedocs.io/en/latest/04-opencv-basics.html In this tutorial everything works fine with png image from the tutorial. But when i try to load my own png image with alpha channel, i get the wrong result. Png image displays with white spaces. Here is the print screens of video capture with both images: correct

问题 We are working on a Three.js based WebGL project, and have trouble understanding how transparency is handled in WebGL. The image shows a doublesided surface drawn with alpha = 0.7, which behaves correctly on its right side. However closer to the middle strange artifacts appear, and on the left side the transparency does not seem to work at all. http://emilaxelsson.se/sandbox/vis1/alpha.png The problem can also be seen here: http://emilaxelsson.se/sandbox/vis1/ Has anyone seen anything similar

问题 This question already has answers here : What is a good way to draw images using pygame? (4 answers) Closed 23 days ago . I'm trying to blit a PNG image onto a surface, but the transparent part of the image turns black for some reason, here's the simple code: screen = pygame.display.set_mode((800, 600), pygame.DOUBLEBUF, 32) world = pygame.Surface((800, 600), pygame.SRCALPHA, 32) treeImage = pygame.image.load("tree.png") world.blit(treeImage, (0,0), (0,0,64,64)) screen.blit(world, pygame.rect

问题 This question already has answers here : What is a good way to draw images using pygame? (4 answers) Closed 23 days ago . I'm trying to blit a PNG image onto a surface, but the transparent part of the image turns black for some reason, here's the simple code: screen = pygame.display.set_mode((800, 600), pygame.DOUBLEBUF, 32) world = pygame.Surface((800, 600), pygame.SRCALPHA, 32) treeImage = pygame.image.load("tree.png") world.blit(treeImage, (0,0), (0,0,64,64)) screen.blit(world, pygame.rect

问题 This question already has answers here : What is a good way to draw images using pygame? (4 answers) Closed 23 days ago . I'm trying to blit a PNG image onto a surface, but the transparent part of the image turns black for some reason, here's the simple code: screen = pygame.display.set_mode((800, 600), pygame.DOUBLEBUF, 32) world = pygame.Surface((800, 600), pygame.SRCALPHA, 32) treeImage = pygame.image.load("tree.png") world.blit(treeImage, (0,0), (0,0,64,64)) screen.blit(world, pygame.rect

问题 This question already has answers here : What is a good way to draw images using pygame? (4 answers) Closed 23 days ago . I'm trying to blit a PNG image onto a surface, but the transparent part of the image turns black for some reason, here's the simple code: screen = pygame.display.set_mode((800, 600), pygame.DOUBLEBUF, 32) world = pygame.Surface((800, 600), pygame.SRCALPHA, 32) treeImage = pygame.image.load("tree.png") world.blit(treeImage, (0,0), (0,0,64,64)) screen.blit(world, pygame.rect

来源： https://stackoverflow.com/questions/15008270/get-alpha-channel-from-uiimage-rectangle