• Vue picture verification code implementation [blob, Base64]


    Realization effect Implementation code 1. GiveimgAdd attribute <div class=”in_code”> <img :src=”verificationImg” @click=”acquireVerification” /> </div> src takesrcIt is bound to the attributes defined in JS in both directions, and the source of image attributes :src=”verificationImg” @click Click the picture to change a verification code @click=”acquireVerification” 2. Query on the page requiring verification code Because I realized […]

  • IOS image upload uses Base64 or binary stream upload avatar function


    When we write code, we often upload avatars to the server. I have tried two ways to upload avatar pictures One way is to upload pictures using Base64 string. I personally think this form is more suitable for uploading pictures with a small number, such as uploading avatars. If there are a large number of […]

  • Example of conversion between Python PIL / CV2 / Base64


    PIL and CV2 are two commonly used image processing libraries in Python. PIL is usually provided by anaconda, and CV2 is the python version of OpenCV. Base64 is often used when transmitting pictures on the network. ##PIL method of reading and saving pictures from PIL import Image img = Image.open(img_path) img.save(img_path2) ##Methods of reading and […]

  • Python to achieve opencv used by the image format and Base64 conversion


    The NP image (imread image) is transcoded to Base64 format def image_to_base64(image_np): image = cv2.imencode(‘.jpg’,image_np)[1] image_code = str(base64.b64encode(image))[2:-1] return image_code Parsing Base64 encoding into opencv available pictures def base64_to_image(base64_code): #Base64 decoding img_data = base64.b64decode(base64_code) #Convert to NP array img_array = np.fromstring(img_data, np.uint8) #Convert to opencv format img = cv2.imdecode(img_array, cv2.COLOR_RGB2BGR) return img The above image […]

  • Python decodes Base64 to get code stream format text instance


    I don’t want to talk much nonsense. Let’s go straight to the code! # coding:utf8 import base64 def BaseToFlow(): while True: str = input(“Please input src: “) flag = input(“Please input Decode – 1 or Encode – 2: “) if str == “”: str = “ApIAGBcEAAAEBO6x3nLykEEhjWMX1wHs” if flag == “”: flag = “1” if flag […]

  • Python turns the picture to Base64 to realize the front-end display


    As follows: # -*- coding: utf-8 -*- import base64 with open(“C:\\Users\\user\\Desktop\\20170508134213.png”,”rb”) as f: #B64encode is encoding and b64decode is decoding base64_data = base64.b64encode(f.read()) # base64.b64decode(base64data) print(base64_data) result: It’s too long to show all How to call Base64 directly in front-end HTML? use <img src=” data:image/jpg; Base64, here is the code of Base64 It’s too long […]

  • HTML5 image into Base64 instance code


    Introduction to Base64 codingBase64 is a commonly used 8-bit byte code encoding method on the network. Base64 can be used to transfer long identification information in the HTTP environment, and can be used in the URL. Because Base64 is not afraid of readability, it has a certain encryption function. Why convert a picture to Base64?Converting […]

  • A method to solve the problem that the transparent area becomes black background when converting canvas to Base64 / jpeg


    When converting PNG image to JPEG with canvas, it is found that the transparent area is filled with black. The code is as follows: XML/HTML CodeCopy content to clipboard <p>Canvas:</p>   <canvas id=“canvas” style=“border: 1px solid #ccc;”></canvas>   <br>   <p>Base64 transcoded image:</p>   <div id=“base64Img”></div>      <script type=“text/javascript”>       var base64Img = document.getElementById(“base64Img”),            canvas = document.getElementById(“canvas”),            context = canvas.getContext(“2d”);       //Create a new picture     var img = new Image();        img.src = “1.png”;           img.addEventListener(“load”, function() { […]

  • Mutual conversion between C # picture and Base64 code (code explanation)


    Base64 is one of the most common encoding methods used to transmit 8bit byte code on the network. Base64 is a method to represent binary data based on 64 printable characters. See rfc2045 ~ rfc2049 for the detailed specification of mime.Base64 encoding is a process from binary to character, which can be used to transfer […]

  • IOS base64 encryption and decryption general class instance code


    In the process of use, the class can be directly introduced into the project without other auxiliary classes. Usage example: after importing the header file of this general class to the target class, call it directly with the class name. NSString *str = [NSString stringWithFormat:@”YWE=”]; NSString *str1 = [NSString stringWithFormat:@”aa”]; NSLog(@”resultStr========%@”,[CommonFunc textFromBase64 String:str ]); // […]

  • VBS version of decryption base64 encryption script


    Copy codeThe code is as follows: Function fDecode(sStringToDecode)  ‘This function will decode a Base64 encoded string and returns the decoded string.  ‘This becomes usefull when attempting to hide passwords from prying eyes.  Const CharList = “ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/”  Dim iDataLength, sOutputString, iGroupInitialCharacter  sStringToDecode = Replace(Replace(Replace(sStringToDecode, vbCrLf, “”), vbTab, “”), ” “, “”)  iDataLength = Len(sStringToDecode)  If iDataLength Mod 4 <> 0 Then  fDecode = “Bad string passed to fDecode() function.”  Exit Function  End If  For iGroupInitialCharacter = 1 To iDataLength Step 4  Dim iDataByteCount, iCharacterCounter, sCharacter, iData, iGroup, sPreliminaryOutString  iDataByteCount = 3  iGroup = 0     For iCharacterCounter = 0 To 3      sCharacter = Mid(sStringToDecode, iGroupInitialCharacter + iCharacterCounter, 1)       If sCharacter = “=” Then        iDataByteCount = iDataByteCount – 1        iData = 0       Else        iData = InStr(1, CharList, sCharacter, 0) – 1         If iData = -1 Then          fDecode = “Bad string passed to fDecode() function.”          Exit Function         End If       End If      iGroup = 64 * iGroup + iData     Next  iGroup = Hex(iGroup)  iGroup = String(6 – Len(iGroup), “0”) & iGroup  sPreliminaryOutString = Chr(CByte(“&H” & Mid(iGroup, 1, 2))) & Chr(CByte(“&H” & Mid(iGroup, 3, 2))) & Chr(CByte(“&H” & Mid(iGroup, 5, 2)))  sOutputString = sOutputString & Left(sPreliminaryOutString, iDataByteCount)  Next  fDecode = sOutputString  End Function VBS code package

  • VBS Base64 decryption script code


    Copy codeThe code is as follows: Function fDecode(sStringToDecode) ‘This function will decode a Base64 encoded string and returns the decoded string. ‘This becomes usefull when attempting to hide passwords from prying eyes. Const CharList = “ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/” Dim iDataLength, sOutputString, iGroupInitialCharacter sStringToDecode = Replace(Replace(Replace(sStringToDecode, vbCrLf, “”), vbTab, “”), ” “, “”) iDataLength = Len(sStringToDecode) If iDataLength […]