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2万8千张图片如何用python组成一张（简洁明了附源码）
= 3: continue image = cv2.resize(image, (blocksize, blocksize)) avgcolor = np.sum(np.sum(image, axis=0), axis=0) / (blocksize * blocksize) sourceimages.append(image) (int(targetimage.shape[0]/args.blocksize)))): block = targetimage[j * args.blocksize: (j + 1) * args.blocksize, i * args.blocksize: (i + 1) * args.blocksize,:] avgcolor = np.sum(np.sum(block * args.blocksize, i * args.blocksize: (i + 1) * args.blocksize, :] = \ sourceimages[idx]
66910发布于 2020-09-15 - 来自专栏Python分享
什么是马赛克图片？如果用Python把21057张图片合成一张，会是什么样的
= 3: continue # 缩放尺寸 image = cv2.resize(image, (blocksize, blocksize)) # 图像颜色平均值 avgcolor = np.sum(np.sum(image, axis=0), axis=0) / (blocksize * blocksize) sourceimages.append (int(targetimage.shape[0]/args.blocksize)))): block = targetimage[j * args.blocksize: (j + 1) * args.blocksize, i * args.blocksize: (i + 1) * args.blocksize,:] avgcolor = np.sum(np.sum(block * args.blocksize, i * args.blocksize: (i + 1) * args.blocksize, :] = \ sourceimages[idx]
98020编辑于 2022-01-04 - 来自专栏全栈程序员必看
golang的AES加密和解密的三种模式实现（CBC/ECB/CFB）「建议收藏」
:= block.BlockSize() // 获取秘钥块的长度 origData = pkcs5Padding(origData, blockSize int) []byte { padding := blockSize - len(ciphertext)%blockSize padtext := bytes.Repeat([]byte{byte ) / aes.BlockSize plain := make([]byte, length*aes.BlockSize) copy(plain, origData) pad := byte(len (); bs <= len(origData); bs, be = bs+cipher.BlockSize(), be+cipher.BlockSize() { cipher.Encrypt(encrypted (); bs < len(encrypted); bs, be = bs+cipher.BlockSize(), be+cipher.BlockSize() { cipher.Decrypt(decrypted
6.7K20编辑于 2022-07-31 - 来自专栏python3
Python读取文件的最后一行（非空行）
= 1024 dat_file = open(inputfile, 'rb') last_line = "" if filesize > blocksize: maxseekpoint = (filesize // blocksize) dat_file.seek((maxseekpoint - 1) * blocksize) elif : maxseekpoint = (filesize // blocksize) dat_file.seek(maxseekpoint * blocksize) = 1024 with open(inputfile, 'rb') as f: last_line = "" if filesize > blocksize: maxseekpoint = (filesize // blocksize) f.seek((maxseekpoint - 1) * blocksize)
5.3K30发布于 2020-01-07 - 来自专栏陶士涵的菜地
[GO]golang实现AES加解密
import ( "bytes" "crypto/aes" "crypto/cipher" ) func PKCS5Padding(ciphertext []byte, blockSize int) []byte { padding := blockSize - len(ciphertext)%blockSize padtext := bytes.Repeat([]byte = nil { return nil, err } blockSize := block.BlockSize() origData = PKCS5Padding (origData, blockSize) blockMode := cipher.NewCBCEncrypter(block, key[:blockSize]) crypted := = nil { return nil, err } blockSize := block.BlockSize() blockMode := cipher.NewCBCDecrypter
73440发布于 2021-07-20 - 来自专栏数据和云
分区表可以使用不同BLOCK_SIZE的表空间吗？
看文档的时候提到了多个BLOCKSIZE对分区的影响，觉得比较有意思，于是测试了一下。 结论一：Oracle是不允许一个表的多个分区所在的表空间所处的表空间的BLOCKSIZE不同： ? ? ? 结论二：允许索引和表的BLOCKSIZE不一致： ? 索引的各个分区所在表空间要求BLOCKSIZE一致，但是不要求和表的分区BLOCKSIZE一致。 表的不同索引可以存储在不同BLOCKSIZE的表空间上。 除了索引之外，表的LOB字段可以和表存放在不同的BLOCKSIZE的表空间中，同样的，分区表的LOB分区所在表空间的BLOCKSIZE可以和表分区所在表空间的BLOCKSIZE不同： ? 允许LOB和OVER段与表的BLOCKSIZE不一致是有一定意义的，比如在一个BLOCKSIZE为2K的数据库中，如果LOB段的大小也是2K，对于LOB的存储容量和效率都会产生不利的影响。
1.5K110发布于 2018-03-08 - 来自专栏Go 技术
Go 语言实现 AES 算法的加解密操作
int) []byte { padding := blockSize - len(data)%blockSize padText := bytes.Repeat([]byte{byte(padding = nil { return nil, err } blockSize := block.BlockSize() plainText = pkcs7Padding(plainText, blockSize = nil { return nil, err } blockSize := block.BlockSize() plainText := make([]byte, len(cipherText = nil { return nil, err } blockSize := block.BlockSize() plainText = pkcs7Padding(plainText, blockSize = nil { return nil, err } blockSize := block.BlockSize() if len(cipherText)%blockSize !
74721编辑于 2024-11-15 - 来自专栏监控
不背锅运维：Go实现aes加密，并带你手撸一个命令行应用程序
int) []byte { padding := blockSize - len(data)%blockSize padText := bytes.Repeat([]byte{byte(padding = nil { return nil, err } blockSize := block.BlockSize() encryptBytes := pkcs7Padding(data, blockSize = nil { return nil, err } blockSize := block.BlockSize() blockMode := cipher.NewCBCDecrypter(block, int) []byte { padding := blockSize - len(data)%blockSize padText := bytes.Repeat([]byte{byte(padding = nil { return nil, err } blockSize := block.BlockSize() encryptBytes := pkcs7Padding(data, blockSize
55720编辑于 2023-02-16 - 来自专栏技术圈
Golang里的AES加密、解密，支持AES-ECB-PKCS7Padding等多种加密组合，兼容JAVA、PHP等语言
下面是一个填充的方法：func PKCS7Padding(src []byte, blockSize int) []byte {padding := blockSize - len(src)%blockSizepadtext := block.BlockSize()encryptData := make([]byte, len(src))tmpData := make([]byte, blockSize)for index := 0; index < len(src); index += blockSize {block.Encrypt(tmpData, src[index:index+blockSize])copy(encryptData := block.BlockSize()tmpData := make([]byte, blockSize)for index := 0; index < len(src); index += blockSize = nil {panic(err)} src = PKCS7Padding(src, block.BlockSize())dst, err := ECBEncrypt(block, src, key
1.6K10编辑于 2024-06-11 - 来自专栏码客
Go语言 字符串加密
:= block.BlockSize() // 补全码 strData = PKCS7Padding(strData, blockSize) // 加密模式 blockMode := cipher.NewCBCEncrypter(block, k[:blockSize]) // 创建数组 cryted := make([]byte, len(strData)) := block.BlockSize() // 加密模式 blockMode := cipher.NewCBCDecrypter(block, k[:blockSize]) / func PKCS7Padding(ciphertext []byte, blocksize int) []byte { padding := blocksize - len(ciphertext )%blocksize padtext := bytes.Repeat([]byte{byte(padding)}, padding) return append(ciphertext,
1.2K30编辑于 2022-10-07 - 来自专栏一心无二用，本人只专注于基础图像算法的实现与优化。
【算法随记七】巧用SIMD指令实现急速的字节流按位反转算法。
= 4, Block = Length / BlockSize; for (int Y = 0; Y < Block * BlockSize; Y += BlockSize) { = 4, Block = Length / BlockSize; for (int Y = 0; Y < Block * BlockSize; Y += BlockSize) { = 4, Block = Length / BlockSize; for (int Y = 0; Y < Block * BlockSize; Y += BlockSize) { = 4, Block = Length / BlockSize; for (int Y = 0; Y < Block * BlockSize; Y += BlockSize) { = 4, Block = Length / BlockSize; for (int Y = 0; Y < Block * BlockSize; Y += BlockSize) {
1.6K20发布于 2020-01-02 - 来自专栏全栈程序员必看
HttpURLConnection_浅析情绪管理的方法技巧论文
= 1024*2; //如果能除尽指定线程数 否则线程数+1 int size = contentLength%blockSize== contentLength/blockSize : (contentLength/blockSize)+1; for(int i = 0 , fileName,(i+1)*blockSize).start(); System.out.println("启动了第："+i+" 线程---------- -----------"+blockSize); } } } catch (MalformedURLException e) { ,String fileName,int TotalLength){ this.fileCount = fileCount; this.blockSize = blockSize
37520编辑于 2022-10-01 - 来自专栏C/C++基础
Go AES加解密
"crypto/aes" "bytes" "encoding/base64" ) //@brief:填充明文 func PKCS5Padding(plaintext []byte, blockSize int) []byte{ padding := blockSize-len(plaintext)%blockSize padtext := bytes.Repeat([]byte{byte = nil { return nil, err } //AES分组长度为128位，所以blockSize=16，单位字节 blockSize := block.BlockSize () origData = PKCS5Padding(origData,blockSize) blockMode := cipher.NewCBCEncrypter(block = nil { return nil, err } //AES分组长度为128位，所以blockSize=16，单位字节 blockSize := block.BlockSize
12.9K30发布于 2019-05-05 - 来自专栏一个会写诗的程序员的博客
Go 分组 & 排序
:= 20 a, b := 0, blockSize for b <= n { insertionSort_func(data, a, b) a = b b += blockSize } insertionSort_func(data, a, n) for blockSize < n { a, b = 0, 2*blockSize for b <= n { symMerge_func(data, a, a+blockSize, b) a = b b += 2 * blockSize } if m := a + blockSize; m < n { symMerge_func (data, a, m, n) } blockSize *= 2 } } package sort // Auto-generated variant of
93330编辑于 2022-06-22 - 来自专栏james大数据架构
Android：StatFs类 获取系统/sdcard存储空间信息
File path = Environment.getDataDirectory(); StatFs stat = new StatFs(path.getPath()); long blockSize stat.getBlockSize(); long availableBlocks = stat.getAvailableBlocks(); return availableBlocks * blockSize path = Environment.getDataDirectory(); StatFs stat = new StatFs(path.getPath()); long blockSize ; //每个block 占字节数 long totalBlocks = stat.getBlockCount(); //block总数 return totalBlocks * blockSize = stat.getBlockSize(); long totalBlocks = stat.getBlockCount(); return totalBlocks * blockSize
3.5K50发布于 2018-01-22 C++ CryptoPP使用AES加解密
];// 加密后密文数据块unsigned char outBlock[AES::BLOCKSIZE];// 必须设定全为0unsigned char xorBlock[AES::BLOCKSIZE]; );RtlZeroMemory(xorBlock, AES::BLOCKSIZE);RtlZeroMemory(outBlock, AES::BLOCKSIZE);// 获取加密块if (dwOffset ];// 解密后后明文数据块unsigned char outBlock[AES::BLOCKSIZE];// 必须设定全为0unsigned char xorBlock[AES::BLOCKSIZE] ;// 余数DWORD dwRemaind = dwEncryptData % AES::BLOCKSIZE;if (0 ! );RtlZeroMemory(xorBlock, AES::BLOCKSIZE);RtlZeroMemory(outBlock, AES::BLOCKSIZE);// 将加密数据块拷贝到输入数据块if
1.9K10编辑于 2023-11-30- 来自专栏golang开发笔记
Go 加密解密算法总结
) / aes.BlockSize plain := make([]byte, length*aes.BlockSize) copy(plain, src) pad := byte (); bs < len(encrypted); bs, be = bs+cipher.BlockSize(), be+cipher.BlockSize() { cipher.Decrypt := block.BlockSize() // 加密模式 blockMode := cipher.NewCBCDecrypter(block, k[:blockSize]) / func PKCS7Padding(ciphertext []byte, blocksize int) []byte { padding := blocksize - len(ciphertext ] data = data[aes.BlockSize:] if len(data) % aes.BlockSize !
3.3K31发布于 2020-09-27 - 来自专栏Golang语言社区
Golang语言 加密系列之AES
= nil { return nil, err } plantText = PKCS7Padding(plantText, block.BlockSize()) blockModel blockModel.CryptBlocks(ciphertext, plantText) return ciphertext, nil } func PKCS7Padding(ciphertext []byte, blockSize int) []byte { padding := blockSize - len(ciphertext)%blockSize padtext := bytes.Repeat([]byte{ ciphertext)) blockModel.CryptBlocks(plantText, ciphertext) plantText = PKCS7UnPadding(plantText, block.BlockSize ()) return plantText, nil } func PKCS7UnPadding(plantText []byte, blockSize int) []byte { length
1.2K90发布于 2018-03-21 - 来自专栏ReganYue's Blog
【Go】【密码学】【Day01】对字符串进行简单加解密
[i] - byte(sum) } //去除尾部填充数据 p := UnPaddingText(cipherTxt) return p } //填充最后一个分组 //src:待填充的明文 //blockSize :分组大小 func PaddingText(src []byte, blockSize int) []byte { //求出最后一个分组需要填充的字节数 padding := blockSize - len(src)%blockSize//3 // [3,3,3] padText := bytes.Repeat([]byte{byte(padding)}, padding) //将填充数据拼接到明文后面 :每个块的大小 func ZeroPadding(ciphertext []byte, blocksize int) []byte { //计算需要填充几个字节 padding := blocksize - len(ciphertext)%blocksize padtext := bytes.Repeat([]byte{0}, padding) return append(ciphertext,
93810发布于 2021-09-16 - 来自专栏hbbliyong
Android获取SD卡总容量，可用大小，机身内存总容量及可用大小
= statFs.getBlockSizeLong(); long totalSize=statFs.getBlockCountLong(); return blockSize*totalSize statFs.getBlockSizeLong(); long availableBlocks=statFs.getAvailableBlocksLong(); return blockSize path=Environment.getDataDirectory(); StatFs statFs=new StatFs(path.getPath()); long blockSize =statFs.getBlockSizeLong(); long tatalBlocks= statFs.getBlockCountLong(); return blockSize path=Environment.getDataDirectory(); StatFs statFs=new StatFs(path.getPath()); long blockSize
3.5K80发布于 2018-03-06
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