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ffmpeg所有的解码器（decoders）

由 老子叫甜甜 提交于 2019-12-25 07:36:53
FFMPEG解码器 Decoders : V . . . . . = Video ( 视频流） A . . . . . = Audio（音频流） S . . . . . = Subtitle（字幕流） . F . . . . = Frame - level multithreading . . S . . . = Slice - level multithreading . . . X . . = Codec is experimental . . . . B . = Supports draw_horiz_band . . . . . D = Supports direct rendering method 1 -- -- -- V . . . . D 012 v Uncompressed 4 : 2 : 2 10 - bit V . . . . D 4 xm 4 X Movie V . . . . D 8 bps QuickTime 8 BPS video V . . . . D aasc Autodesk RLE VF . . . D aic Apple Intermediate Codec V . . . . D alias_pix Alias / Wavefront PIX image V . . . . D amv AMV Video V . . . . D anm

【Tensorflow 2.0 正式版教程】ImageNet（一）数据增强

由 对着背影说爱祢 提交于 2019-12-16 23:21:34
前面的教程都只在小模型、小数据库上进行了演示，这次来真正实战一个大型数据库ImageNet。教程会分为三部分：数据增强、模型加载与训练、模型测试，最终在ResNet50上可以达到77.72%的top-1准确率，复现出了ResNet原文的结果。 完整的代码可以在我的github上找到。 https://github.com/Apm5/ImageNet_Tensorflow2.0 提供ResNet-18和ResNet-50的预训练模型，以供大家做迁移使用。 链接： https://pan.baidu.com/s/1nwvkt3Ei5Hp5Pis35cBSmA 提取码：y4wo 还提供百度云链接的ImageNet原始数据，但是这份资源只能创建临时链接以供下载，有需要的还请私信联系。下面开始正文。 数据增强 本文着重于数据增强的代码实现，内容的学习可以参考CVPR2019上的一篇文章 Bag of Tricks for Image Classification with Convolutional Neural Networks 。文章中提到在训练时图像依次进行： 随机选取一张图片并转为32位浮点数 随机选取一个长宽比在3：4到4：3之间的区域，区域面积占完整图像的8%到100%，然后将选取的区域插值为224*224大小 50%的概率进行左右翻转 图像在hsv空间随机抖动，抖动幅度采样于

[iOS]详解调整UIButton的title和image的位置

由 ↘锁芯ラ 提交于 2019-12-08 03:25:48
很多次,系统默认的UIButton不能满足需求,每次都是查了很多资料,最后还是用最复杂的方式来修改button的标题和图片的位置,今天,花些时间来梳理一下这方面的知识... UIButton的默认布局是:title在右,image在左; 很多时候我们需要的是title在左边,或者title在下面,这时就需要调整UIButton的TitleLabel和ImageView的位置了,查了很多资料,要么零零散散的介绍,要么就是特别复杂的实现;经过一段时间的学习,在这里总结一下实现的方式; 一种是设置UIButton的以下两个属性: @property(nonatomic) UIEdgeInsets titleEdgeInsets; // default is UIEdgeInsetsZero @property(nonatomic) UIEdgeInsets imageEdgeInsets; // default is UIEdgeInsetsZero 还有一种就是,自定义button,继承自UIButton,重写UIButton的以下两个方法: - (CGRect)titleRectForContentRect:(CGRect)contentRect; - (CGRect)imageRectForContentRect:(CGRect)contentRect; 下面来介绍这两种实现方式:

div on top of responsive background image

由 匿名 (未验证) 提交于 2019-12-03 10:24:21
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am trying to create a simple responsive splash page with a background image and a div on top. I have managed to get the responsive background image. This works well. Now I am having issue placing a div on top of this background and making sure it follows the resizing properly. I have set percentage margins for this div but it's not keeping the percentages, also if I make the window too small then the div disappears completely. How can I fix this problem? Thanks a lot for your help. Guillaume The address: http://b-tees.net/testsplash/ My

Javascript: image object -> HTML image element

由 匿名 (未验证) 提交于 2019-12-03 09:14:57
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: The code preloads an image into an image object and then (supposed to) set it to the image element src on HTML: <!DOCTYPE html> <html> <head> <script language="javascript"> window.onload = function () { var oImage = new Image(); oImage.onload = function () { document.getElementById('myImage').src = oImage; alert('done'); }; oImage.src = 'image1.jpg'; } </script> </head> <body> <img id="myImage" src="" /> </body> </html> Why it doesn't work? 回答1: Try <!DOCTYPE html> <html> <head> <script language="javascript"> window.onload = function () {

How do I write/create a GeoTIFF RGB image file in python?

由 匿名 (未验证) 提交于 2019-12-03 08:52:47
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have 5 numpy arrays of shape nx, ny lons.shape = (nx,ny) lats.shape = (nx,ny) reds.shape = (nx,ny) greens.shape = (nx,ny) blues.shape = (nx,ny) My question is how do I write this data to a geotiff? I ultimately want to plot the image using basemap. Here is the code I have so far, however I get a huge GeoTIFF file (~500MB) and it comes up blank (just a black image). Also note that nx, ny = 8120, 5416. from osgeo import gdal from osgeo import osr import numpy as np import h5py import os os.environ['GDAL_DATA'] = "/Users/andyprata/Library

How to convert a 16 bit to an 8 bit image in OpenCV?

由 匿名 (未验证) 提交于 2019-12-03 08:44:33
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I have a 16bit grayscale image and I want to convert it to a 8bit grayscale image in OpenCV for python to use it with various functions (like findContours etc.). Is it possible to do it in python or I have to switch to C++? 回答1: You can use numpy conversion methods as an OpenCV mat is a numpy array. This works: img8 = ( img16 / 256 ). astype ( 'uint8' ) 回答2: You can do this in Python using NumPy by mapping the image trough a lookup table. import numpy as np def map_uint16_to_uint8 ( img , lower_bound = None , upper_bound = None ):

Android Camera - app passed NULL surface

由 匿名 (未验证) 提交于 2019-12-03 08:36:05
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Whenever I run the cam_thread I get the error "app passed NULL surface". This code supposedly works on the HTC Incredible 1. I've reconfigured it slightly to run on a droid x. However I still get this error. public class Android_Activity extends Activity { Main_thread simulator; ToggleButton togglebutton; EditText ip_text; SensorManager sm = null; SurfaceView view; Sensors_thread the_sensors=null; String IP_address; Android_Activity the_app; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);

IIS 8.5 is not serving JS, CSS, and Image files (static content)

由 匿名 (未验证) 提交于 2019-12-03 08:36:05
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: The problem We're running IIS on Windows 8.1 with Update. We're at the Orchard CMS first time setup screen, and IIS is giving 401s for all static content. We have read the following to no avail: IIS 7.5 no images css js showing IIS 7.5 no images css js showing The official Orchard deployment documentation Based on those, this is what I have tried that doesn't work . Turn on the IIS feature to Serve Static Content. Give IIS_IUSRS permission to Read, write & execute. Give the site's application pool permission to Read, write & execute. What
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