compress image file size without losing quality

Today in the small feature of uploading images, using a Kissy upload component. Curious how it detects the size and size of a picture before it is uploaded? Let's write a little example. How to read the size of a pictureFirst, the native input file control has a Files property, which is an array. The elements in the ar

#region Picture Scaling//　　ASP. NET upload image file automatically modify image size code

// ================================================ ==================================== // Function: of_getpicturesize () //-------------------------------------------------------------------- // Description: obtains the image size of an image file (supported in GIF, JPG, and BMP formats) //---------------------------

PrefaceWhen we do a lot of systems, we may have the need to:Only one picture is maintained in the CMS, and this image needs to be displayed in many parts of the site, and the size of the display is different.The general practice is to use this image directly, to set the display size of the

Php checks the uploaded file type and image size code. There are two examples in this article to check the Upload file type and the size of the uploaded image. I originally wanted to separate the two files, but I thought it would

There is no size limit for the ckeditor editor to upload images or files. Here we will introduce two solutions to the size limit of the files uploaded by ckeditor. One method can be used to limit the size of the PHP. INI configuration file to be uploaded. The other method can only be used to manually modify the Fckedit

Now the problem is the use of PHP upload pictures and Watermark after the volume of a lot of pictures, how to not lose the picture quality of the situation and watermark (currently using GD processing) 1. Try not to distort 2. picture file size should not exceed the original image Reply content: Now the pr

previous check item "turn off System Restore on All Drives.2. The sleep function stores data in the memory to the hard disk and shuts down. After the computer has recovered from its sleep state, it can immediately return to its original running state. This function reserves several hundred MB space (depending on the disk capacity). You can disable it before making a ghost image. The method is as follows: Go to "start"> "set"> "Control Panel"> "powe

One method can be used to limit the size of the PHP. INI configuration file to be uploaded. The other method can only be used to manually modify the Fckeditor source code. The method is as follows:1. Open config. php in the editor/filemanager/connectors/php directory, and create a Config variable to set the size of the uploaded

The article has two instances is used to detect the upload file type and upload image size, I would like to write separately but feel that two will be better Together, the students need to see. The code is as follows Copy Code //-----------------------------------------------------------------------------------Function name: Checkextendn

Source: http://www.ugia.cn /? P = 73 I have to admire this person's clever thoughts. I just got a few simple words! Before a file is uploaded, the file type is determined by the file name. However, it is difficult to check the file size unless it is local or a control is use

; intNewwidth = (int) (Width *percent); intNewheight = (int) (Height *percent); BufferedImage Image=Newbufferedimage (Newwidth, Newheight, BUFFEREDIMAGE.TYPE_INT_BGR); Graphics Graphics=Image.creategraphics (); Graphics.DrawImage (Previmage,0, 0, newwidth, Newheight,NULL); Imageio.write (image, format, OS); Os.flush (); Is.close (); Os.close (); Bytearrayoutputstream b=(bytearray

Front-end code: Style = "height: 26px"/> Background code: Protected void button1_click1 (Object sender, eventargs E){// Obtain the full path name of the file on the client computer (for example, "d:/myfiles/lo.txt ")String fullfilename = This. fileupload. postedfile. filename; // Obtain the specific file name (for example, "lo.txt ")String filename = fullfilename. substring (fullfilename. lastindexof (@ "/

the previous check item "turn off System Restore on All Drives.2. The sleep function stores data in the memory to the hard disk and shuts down. After the computer has recovered from its sleep state, it can immediately return to its original running state. This function reserves several hundred MB space (depending on the disk capacity). You can disable it before making a GHOST image.The method is as follows: Go to "start"> "set"> "Control Panel"> "power options"> "Sleep", and deselect "enable sl

There are two examples in this article to check the Upload file type and the size of the uploaded image. I originally wanted to separate the two files, but I thought it would be better to put them together. There are two examples in this article to check the Upload file type and the

Private void button#click (Object sender, eventargs e) {response (); textbox1.font = response;} private void button2_click (Object sender, eventargs e) {response (); textbox1.backcolor = colordigalo1.color ;} private void button3_click (Object sender, eventargs e) {savefiledialog1.filename = ""; savefiledialog1.showdialog (); label1.text = savefiledialog1.filena Me; try {This. picturebox1.image. save (savefiledialog1.filename);} catch (exception ee) {

How do you shrink the file size of a GIF image with a GIF Movie gear? 1, GIF Movie gear edit each frame gif screen GIF Movie Gear The main function of this software is to open the animated GIF picture and modify it, as shown in the following figure, when we open an animated GIF image with a GIF Movie gear, each fram

This article is saved as an. html file opened in a browser to test functionality function check () { var aa= document.getElementById ("UserFile"). Value.tolowercase (). Split ('. '); /with "." Separate the upload file string //var aa=document.form1.userfile.value.tolowercase (). Split ('. '); /with "." Separate upload file string if (docume

As follows:Copy codeThe Code is as follows:Function checkAttachment (){Alert ("here ");Var attachmentArray = document. getElementsByTagName ("input ");Var attachmentSizeArray = document. getElementsByName ("fileMaxSize ");Var index = 0;For (var I = 0; I Var attachment = attachmentArray [I];If (attachment. type = "file "){If (! IsPhoto (attachment. value )){Alert ("the uploaded attachment must be a photo .");Attachment. focus ();Return false;}If (getFi

0x00This article belongs to the essay, only for the author's study record.0x01 Bulk Modified image size:[Email protected]:~/$ Find/-name ' *.jpg '-exec convert-resize 220x520! {} {} \;Note: In the above command,The Find path-name files that match the. jpg suffix-exec to the find result, the Convert command is followed by the convert parameter, and if convert is not installed, sudo apt-get install convert is