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include image files in Django templates shows broken link?

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问题 All, I've tried the tips found on the forum. Unfortunately i'm still stuck. The image doesn't appear in the template. As far as i've traced the errors now they are twofold: 1) one where the picture should appear there is still a broke link and an error message: Failed to load resource: the server responded with a status of 404 (NOT FOUND), **http://127.0.0.1:8000/Point3D/grafiek/laptop.jpg** So it does go in the right path, but can't find the image.. Which is in my MEDIA_ROOT or I receive:

AS3 PNG Encoder?

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问题 Is there a way to encode bitmap data into PNG for use with a FileReference.Save() method in AS3? I assume I need an encoder library. Where can I get a library that encode BitpmapData into PNG? 回答1: You're looking for: https://github.com/mikechambers/as3corelib There are probably other solutions, but this is widely used and well tested. I've used it myself on several occasions without issue. 回答2: Shameless plug! I just wrote a new PNG encoder called PNGEncoder2. It's extremely fast, offers

python将pdf文档转为png图片

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python -V 3 需求五个pdf文档需要都转成png格式图片代码可以使用PyMuPDF库逻辑： 1、首先读取一个文件夹下面的所有pdf文档 2、然后对这些pdf文档一个一个的进行pdf转png，一页pdf转为一个png图片，一个pdf文档转成的所有png图片存在一个文件夹下面 import fitz import os def f ( position ) : name = os . listdir ( './%s' % position ) for n in name : # 打开PDF文件，生成一个对象 path = r './pdfs/%s' % n doc = fitz . open ( path ) for pg in range ( doc . pageCount ) : page = doc [ pg ] rotate = int ( 0 ) # 每个尺寸的缩放系数为2，这将为我们生成分辨率提高四倍的图像。 zoom_x = 2 zoom_y = 2 trans = fitz . Matrix ( zoom_x , zoom_y ) . preRotate ( rotate ) pm = page . getPixmap ( matrix = trans , alpha = False ) dir_1 = './pngs/%s/' % n [ : - 3

瀑布流图片加载

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<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> <style> .imglist{width: 100%;height: auto;position: relative;} .imglist ul{padding:0px;margin:0px auto;position: relative;} .imglist ul li{width: 220px;border:1px solid #ccc;padding: 5px;float: left;list-style: none;position: absolute;} .imglist ul li img{width: 100%;vertical-align: middle;} .more{position: absolute;display: block;width: 100px;height:30px;padding: 5px 10px;background-color: #efefef;color:#333;left: 0px;right:0px;margin: 0px auto;border:none;border-radius: 4px;} </style> </head> <body> <div class="imglist">

Does anyone have an example of Apache POI converting PPTX to PNG

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问题 Does anyone know of a good example of converting a PPTX powerpoint presentation to some form of image? PNG/GIF/etc? I can do it for a PPT but looking for a PPTX conversion example Thanks 回答1: In the meantime it works (... copied it from there): import java.awt.Color; import java.awt.Dimension; import java.awt.Graphics2D; import java.awt.geom.AffineTransform; import java.awt.geom.Rectangle2D; import java.awt.image.BufferedImage; import java.io.FileInputStream; import java.io.FileOutputStream;

Does anyone have an example of Apache POI converting PPTX to PNG

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How to get text in png file using Java

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问题 I want to check if particular string is present in the image. Is that possible? Is pngj can do that? My file will contain a graph and some legends. I want to check the if the legends are correct. 回答1: No, you can't do that with pngj. The text that is visible in the PNG image is not internally stored as text. You will need OCR software if you wish to identify the text. However it would be much better if you could get the data in another format that is easier to parse by a computer. 回答2: Yes,

数据库SQL优化

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本文链接： https://blog.csdn.net/jianzhang11/article/details/102867120 判断问题SQL 判断SQL是否有问题时可以通过两个表象进行判断：系统级别表象 CPU消耗严重 IO等待严重页面响应时间过长应用的日志出现超时等错误可以使用sar命令，top命令查看当前系统状态。也可以通过Prometheus、Grafana等监控工具观察系统状态。（感兴趣的可以翻看我之前的文章）640?wx_fmt=png SQL语句表象冗长执行时间过长从全表扫描获取数据执行计划中的rows、cost很大冗长的SQL都好理解，一段SQL太长阅读性肯定会差，而且出现问题的频率肯定会更高。更进一步判断SQL问题就得从执行计划入手，如下所示：640?wx_fmt=png 执行计划告诉我们本次查询走了全表扫描Type=ALL，rows很大(9950400)基本可以判断这是一段"有味道"的SQL。获取问题SQL 不同数据库有不同的获取方法，以下为目前主流数据库的慢查询SQL获取工具 MySQL 慢查询日志测试工具loadrunner Percona公司的ptquery等工具 Oracle AWR报告测试工具loadrunner等相关内部视图如v$、$session_wait等 GRID CONTROL监控工具达梦数据库 AWR报告

Attach multiple image formats, not just JPG to email

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问题 This is what i have so far... MemoryStream imgStream = new MemoryStream(); System.Drawing.Image img = System.Drawing.Image.FromStream(fuImage.PostedFile.InputStream); string filename = fuImage.PostedFile.FileName; img.Save(imgStream, System.Drawing.Imaging.ImageFormat.Jpeg); imgStream.Seek(0L, SeekOrigin.Begin); EmailMsg.Attachments.Add(new Attachment(imgStream, filename, System.Net.Mime.MediaTypeNames.Image.Jpeg)); So it attaches a JPEG image fine. But i want to change it so that it allows

Reduce bit-depth of PNG files from the command line

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问题 What command or series of commands could I execute from the CLI to recursively traverse a directory tree and reduce the bit-depth of all PNG files within that tree from 24bpp to 16bpp? Commands should preserve the alpha layer and should not increase the file size of the PNGs - in fact a decrease would be preferable. I have an OSX based system at my disposal and am familiar with the find command so am really more keen to to locate a suitable PNG utility command. 回答1: AFAIK the only PNG format