blockchain scan qr code

. Because there was no contact with the graphics processing this piece, is basically learning while doing, mainly from the processing of ideas to find the corresponding graphics processing tools.OpenCV support multiple languages, such as C + +, Python, the current network of more reference documents are based on C + +, considering the ease of programming language, the decision to use Python development. Given the need to publish an HTTP service to the app-side call, the final Python program need

(file_get_contents ($ logo); $ QR_width = imagesx ($ QR ); // QR code image width $ QR_height = imagesy ($ QR); // QR code image height $ logo_width = imagesx ($ logo ); // logo image width $ logo_height = imagesy ($ logo); // lo

(file_get_contents ($ QR ));$ Logo = imagecreatefromstring (file_get_contents ($ logo ));$ QR_width = imagesx ($ QR); // the image width of the QR code.$ QR_height = imagesy ($ QR); // The Image height of the QR

= 'qrcode.png '; // generated original QR code If ($ logo! = FALSE ){$ QR = imagecreatefromstring (file_get_contents ($ QR ));$ Logo = imagecreatefromstring (file_get_contents ($ logo ));$ QR_width = imagesx ($ QR); // the image width of the

height $ logo_width = imagesx ($ logo ); // logo image width $ logo_height = imagesy ($ logo); // logo image height $ logo_qr_width = $ QR_width/5; $ scale = $ logo_width/$ logo_qr_width; $ logo_qr_height = $ logo_height/$ scale; $ from_width = ($ QR_width-$ logo_qr_width)/2; // re-combine the image and resize imagecopyresampled ($ QR, $ logo, $ from_width, $ from_width, 0, 0, $ logo_qr_width, $ logo_qr_height, $ logo_width, $ logo_height);} // outpu

width $ logo_height = imagesy ($ logo); // logo image height $ logo_qr_width = $ QR_width/5; $ scale = $ logo_width/$ logo_qr_width; $ logo_qr_height = $ logo_height/$ scale; $ from_width = ($ QR_width-$ logo_qr_width)/2; // re-combine the image and resize imagecopyresampled ($ QR, $ logo, $ from_width, $ from_width, 0, 0, $ logo_qr_width, $ logo_qr_height, $ logo_width, $ logo_height);} // output image imagepng ($

); // logo image width$ Logo_height = imagesy ($ logo); // logo image height$ Logo_qr_width = $ QR_width/5;$ Scale = $ logo_width/$ logo_qr_width;$ Logo_qr_height = $ logo_height/$ scale;$ From_width = ($ QR_width-$ logo_qr_width)/2;// Re-combine and resize the imageImagecopyresampled ($ QR, $ logo, $ from_width, $ from_width, 0, 0, $ logo_qr_width,$ Logo_qr_height, $ logo_width, $ logo_height );}// Output imageImagepng ($

license, membership card, identification certificate, chain store membership card and so on, play the information management effect of "follow-up" and "Instant access".Counting AppsThe automatic inventory of goods and fixed assets of Logistics center, Warehousing Center, Joint Service Center, and give full play to "immediate inventory, immediate decision-making" effect.Redundancy ApplicationsDocument form information if unwilling or unable to disk, CD-ROM and other electronic media storage back

= $ logo_width/$ logo_qr_width; $ logo_qr_height = $ logo_height/$ scale; $ from_width = ($ QR_width-$ logo_qr_width)/2; // re-combine the image and resize imagecopyresampled ($ QR, $ logo, $ from_width, $ from_width, 0, 0, $ logo_qr_width, $ logo_qr_height, $ logo_width, $ logo_height);} // output image imagepng ($ QR, 'helloweba.png '); echo ''; The following is a reference to the above

, $ Logo_qr_height, $ logo_width, $ logo_height ); } // Output image Imagepng ($ QR, 'helloweixin.png '); Echo ''; Because the QR code allows some fault tolerance, even if the hidden part of the QR code is still decoded, the scan

($ QR, $ logo, $ from_width, $ from_width, 0, 0, $ logo_qr_width, $ logo_qr_height, $ logo_width, $ logo_height);} // output image imagepng ($ QR, 'helloweba.png '); echo ''; The following is a reference to the above Code. It is easy to call without producing image files. Save the following code as img. php. Call

Share an example of C # to generate two-dimensional code, directly referencing the ThoughtWorks.QRCode.dll class to generate two-dimensional code, there is a need for friends reference.Method 1, directly refer to the ThoughtWorks.QRCode.dll class, generate two-dimensional code.code example:ThoughtWorks.QRCode.Codec.QRCodeEncoder encoder =NewQrcodeencoder (); encoder. Qrcodeencodemode= Qrcodeencoder.encode_m

contentBytes. length The second java file: TwoDimensionCodeImage. java 1 import java.awt.image.BufferedImage; 2 3 import jp.sourceforge.qrcode.data.QRCodeImage; 4 5 public class TwoDimensionCodeImage implements QRCodeImage { 6 7 BufferedImage bufImg; 8 9 public TwoDimensionCodeImage(BufferedImage bufImg) {10 this.bufImg = bufImg;11 }12 13 public int getHeight() {14 return bufImg.getHeight();15 }16 17 public int getPixel(int x, int y) {18

(The last few days have been made QR code polling login thought for a long time finally came out to share to everyone ^-^)Polling:The so-called polling definitely needs setinterval But how to add AJAX requests needs a little bit of a problem and you need to stop looking at the code after a successful poll var tis = setinterval (function () {$. Ajax (getting)}

Scan the QR code to register and scan the logon register. Scan-code logon is the most popular and convenient logon method. Here I use the public number to demonstrate the QR

four standardized encoding modes (numbers, alphanumeric, byte (binary), and kanji) to store data. QR codes are most commonly found in Japan and are currently the most popular two-dimensional barcode in Japan. QR code compared to ordinary barcode can store more data, and do not need to be like a regular barcode in the scan