gd t for beginners

In machine learning, the gradient descent (Gradient descent, GD) algorithm only needs to calculate the first derivative of the loss function, the calculation cost is small, it is very suitable for the training data very large application.The physical meaning of the gradient descent method is well understood, that is, the line is searched along the gradient direction of the current point, and the next iteration point is found. But, why does it derive t

Use the GD library to generate images with shadow text and gd shadow. The GD library is used to generate images with shadow text. the gd shadow Library is recently used to generate images for public accounts, after studying the generation of text shadow effects in the GD lib

GD: Gd support library for installing PHP in Linux. Gd support library for installing PHP in Linux 1. Download Gd-2.0.33.tar.gz http://www.boutell.com/gd/Jpegsrc.v6b.tar.gz http://www.ijg.org/Libpng-1.2.7.tar.tar http://sourceforge.net/projects/libpng/Zlib-1.2.2.tar.gz http

/usr/local/jpeg/bin Mkdir-p/usr/local/jpeg/man/man1 OK, and then the compilation is successful.3, check whether the installation of libpngRpm-qa libpngNo words compiled libpng here download./configure--prefix=/usr/local/pngMake make install4, install the GD library here to downloadTAR-ZXVF gd-2.0.35.tar.gzCD gd-2.0.35./configure--PREFIX=/USR/LOCAL/GD25, compil

Use the GD library to create a picture with shaded text, GD shadow Recently, the use of GD library for the public account of the image generation, the study of the GD library text shadow effect generated at the same time also found the strong GD library.

Example of using the GD library to create a round pie chart in PHP, GD round In PHP, there are some simple image functions can be used directly, but most of the images to be processed, you need to compile PHP with the GD library. In addition to installing the GD library, additional libraries may be required in PHP, de

GD database usage summary --- 2, gd summary --- 2. GD database usage summary --- 2, gd summary --- 2 and the previous article. The GD library can be used in a lot of ways. of course, it must be related to drawing. in addition to the verification code and watermark, the

Linux under compilation GD (Freetype+libjpeg+libpng+gd-devel)1. Check whether the FreeType is installedRpm-qa | grep FreeTypeNo words compiled freetype here downloadHttps://www.freetype.org/download.htmlhttp://download.savannah.gnu.org/releases/freetype/./configure--prefix=/usr/local/freetypeMake make install, no flower head 2. Check if Libjpeg is installed Rpm-qa | grep libjpeg No compile libjpeg downlo

Understanding the GD Library in php , using the GD Library to manipulate the image,the GD Library is an open, dynamically created image of the source code of the public Library, available from the official website HTTP://WWW.BOUTELL.COM/GD Download it here. Currently, theGD Library supports Multiple image formats such

Compile GD in linux (freetype + libjpeg + libpng + gd-devel)1. Check whether freetype is installedRpm-qa | grep freetypeIf not, compile freetype and download it here../Configure -- prefix =/usr/local/freetype Make make install.2. Check whether libjpeg is installed. Rpm-qa | grep libjpeg If not, compile libjpeg and download it here. I haven't installed libjpeg either. Download it and start compiling. Jpegsr

Use GD to draw a pie chart and gd to draw a pie chart. Use GD to draw a pie chart in PHP and gd to draw a pie chart in PHP. for the class to be drawn, see the code: 1 ClassChart {2 private $ image; define image 3 private $ title; define Title 4 priv PHP use GD to draw a pie

Example of using the GD library in PHP to create a circular pie chart: gd circle Some simple image functions can be directly used in PHP, but most of the images to be processed need to be added to the GD library during PHP compilation. In addition to installing the GD library, other libraries may be required in PHP, de

. Mkdir-P/usr/local/JPEG/include Mkdir-P/usr/local/JPEG/lib Mkdir-P/usr/local/JPEG/bin Mkdir-P/usr/local/JPEG/man/Man1 OK, then the compilation is successful. 3. Check whether libpng is installed. Rpm-Qa libpng If not, compile libpng and download it here. ./Configure -- prefix =/usr/local/PNG Make make install 4. Install the GD library. Download it here. Tar-zxvf gd-2.0.35.tar.gz CD

GD Library Use Summary---2,GD summary---2 Then the previous article. GD Library can toss a lot of usage out, of course, with drawing related, in addition to the previous verification code, watermark, can also be scaled image, cutting, rotation and other operations, which can be seen in many applications. 1. Add watermark As already known, we can use Imagechar or

GD database usage summary --- 2, gd summary --- 2 Next, go to the previous article. The GD library can be used in a lot of ways. Of course, it must be related to drawing. In addition to the Verification Code and watermark above, it can also perform operations such as scaling, cropping, and rotating the image, this can be seen in many applications. 1. Add a waterm

Use of the php-gd library -- Use php (1) and php-gd together with zhaocuan I originally made c #, and switched to php for unit reasons. I have been exploring for myself, having problems with Baidu, and working with various groups to solve my own problems. Recently, the job entered the burnout period, and it happened to be idle. Prepare to update the System and review your knowledge and skills. This is the f

Install the MYSQL5.0 server first (after installation, the default user name is root and the default password is mysql) Which of the following statements is compiled during download? Decompress MySQL and copy all files to/usr/local/mysql. [Root @ Bleach usr] # groupadd mysql [Root @ Bleach usr] # useradd-g mysql [Root @ Bleach mysql] # cd mysql [Root @ Bleach mysql] # scripts/mysql_install_db -- user = mysql [Root @ Bleach mysql] # chown-R root. [Root @ Bleach mysql] # chown-R mysql data [Root @

PHP to achieve large image automatically reduced to small map (and GD library installation) UB 2001.10.11 I think the biggest difference between network programming and ordinary programming is that network programming, in addition to the characteristics of ordinary programming, but also to spend a lot of energy to consider the problem of speed. The site needs a lot of pictures, now there are a lot of users to store photos, pictures of the "album" Pro

) remains unchanged (you can check the attributes). The speed is naturally slow. The real scale-down is to reduce the size (capacity) of a large image, that is, to regenerate a small image file. One of my programs has this function and is testing: www1.yn.cninfo.net/love In addition, the GD library has many functions, such as program drawing and some special counters. FREETYPE fonts can also be supported. There are many functions and powerful function

For ease of installation, I wrote about the GD installation process. I hope my friends will give me more comments. thank you! Originally, GD did not support WBMP, and now expanded GD to support WBMP. Use php to support gif, jpeg, ttf, and wbmp For ease of installation, I wrote about the GD installation process. I hope