fix: 修复图像任务工作流的数据库集成问题

主要修复和改进:
- 完善图像任务管理器的数据库集成
  * 为PictureTask添加ExifRepository和PhotoRepository依赖注入
  * 实现完整的saveToDatabase方法,支持EXIF和Photo数据保存
  * 修复任务管理器初始化缺少repository参数的问题

- 新增PhotoRepository数据访问层
  * 实现Photo表的CRUD操作
  * 提供CreatePhotoFromImageAPI方法简化数据转换
  * 支持基于Hash的查询和更新操作

- 添加repository安全检查工具
  * 新增repository_helper.go提供空指针检查
  * 防止在repository未初始化时执行数据库操作
  * 提高系统稳定性和错误处理

- 新增感知哈希算法支持
  * 实现perceptual_hash.go提供图像相似度检测
  * 支持DHash和AHash算法
  * 为未来的重复图片检测功能做准备

- 容器依赖注入改进
  * 更新DbContainer集成PhotoRepository
  * 修复TaskContainer的repository依赖传递
  * 完善全局任务管理器的初始化流程

- 示例代码和测试
  * 新增img_task_database_example.go演示数据库集成
  * 添加perceptual_hash_test.go测试用例
  * 完善代码文档和使用说明

技术改进:
- 解决了之前任务完成但数据未保存的问题
- 建立了完整的图像处理到数据库存储的数据流
- 提高了系统的错误处理和容错能力
- 为后续的重复检测和智能分析功能奠定基础

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
jimmyandClaude committed 2025-08-16 16:17:38 +08:00
1 parent cf3f269b7e
commit 33484d9e95
10 files changed
+1009 -14

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@@ -0,0 +1,187 @@
package main
import (
"fmt"
"log"
"rear/internal/config"
"rear/internal/container"
"rear/internal/db"
"rear/internal/workflow"
"time"
)
// ImgTaskDatabaseExample 展示img_task如何保存数据到数据库
func ImgTaskDatabaseExample() {
fmt.Println("=== 图像任务数据库保存示例 ===")
// 1. 初始化配置
config.InitConfig()
// 2. 初始化数据库
if err := db.InitDatabase(); err != nil {
log.Fatal("Failed to initialize database:", err)
}
// 3. 自动迁移
if err := db.AutoMigrate(); err != nil {
log.Fatal("Failed to migrate database:", err)
}
// 4. 创建数据库容器
dbContainer := container.NewContainer()
// 5. 创建任务管理器
taskManager := workflow.NewImgTaskManager(2, dbContainer)
// 6. 添加图像任务进行测试
// 注意:这里需要实际存在的图像文件路径
testImagePaths := []string{
// 替换为你实际的图像文件路径
// "D:/test/sample.jpg",
// "D:/test/photo.png",
}
// 如果没有测试图像,输出使用说明
if len(testImagePaths) == 0 {
fmt.Println("\n使用说明:")
fmt.Println("1. 请在 testImagePaths 中添加实际的图像文件路径")
fmt.Println("2. 确保图像文件存在且可访问")
fmt.Println("3. 重新运行示例")
fmt.Println("\n示例路径格式:")
fmt.Println(`testImagePaths := []string{`)
fmt.Println(` "D:/photos/IMG_1234.jpg",`)
fmt.Println(` "D:/photos/DSC_5678.png",`)
fmt.Println(`}`)
return
}
fmt.Printf("\n准备处理 %d 个图像文件...\n", len(testImagePaths))
// 添加任务
var taskIDs []string
for i, imagePath := range testImagePaths {
taskID := taskManager.AddTask(imagePath)
taskIDs = append(taskIDs, taskID)
fmt.Printf("%d. 添加任务: %s (ID: %s)\n", i+1, imagePath, taskID)
}
// 7. 监控任务进度
fmt.Println("\n开始监控任务进度...")
monitorTasks(taskManager, taskIDs)
fmt.Println("\n=== 示例完成 ===")
}
// monitorTasks 监控任务进度
func monitorTasks(taskManager *workflow.ImgTaskManager, taskIDs []string) {
ticker := time.NewTicker(2 * time.Second)
defer ticker.Stop()
timeout := time.After(5 * time.Minute) // 5分钟超时
for {
select {
case <-timeout:
fmt.Println("监控超时,退出...")
return
case <-ticker.C:
allCompleted := true
fmt.Println("\n--- 任务状态更新 ---")
for i, taskID := range taskIDs {
detail, err := taskManager.GetTaskDetail(taskID)
if err != nil {
fmt.Printf("任务 %d: 获取详情失败 - %v\n", i+1, err)
continue
}
status := detail.Status
progress := detail.Progress
currentStep := detail.StepInfo.StepName
fmt.Printf("任务 %d: %s | 进度: %.1f%% | 当前步骤: %s\n",
i+1, status, progress*100, currentStep)
if detail.Error != "" {
fmt.Printf(" 错误: %s\n", detail.Error)
}
if status != workflow.StatusDone && status != workflow.StatusFailed {
allCompleted = false
}
}
// 显示整体进度
overallProgress := taskManager.GetOverallProgress()
fmt.Printf("整体进度: %d/%d 完成 (%.1f%%)\n",
overallProgress.CompletedTasks,
overallProgress.TotalTasks,
overallProgress.OverallProgress*100)
if allCompleted {
fmt.Println("\n所有任务已完成!")
// 显示数据库保存结果
showDatabaseResults(taskManager, taskIDs)
return
}
}
}
}
// showDatabaseResults 显示数据库保存结果
func showDatabaseResults(taskManager *workflow.ImgTaskManager, taskIDs []string) {
fmt.Println("\n--- 数据库保存结果 ---")
// 这里可以查询数据库验证数据是否保存成功
for i, taskID := range taskIDs {
detail, err := taskManager.GetTaskDetail(taskID)
if err != nil {
continue
}
fmt.Printf("任务 %d (%s):\n", i+1, taskID)
fmt.Printf(" 文件路径: %s\n", detail.Path)
fmt.Printf(" 文件哈希: %s\n", detail.Hash)
fmt.Printf(" 最终状态: %s\n", detail.Status)
fmt.Printf(" 处理时长: %s\n", detail.Duration)
if detail.Status == workflow.StatusDone {
fmt.Printf(" ✓ 数据库保存: 成功\n")
} else if detail.Status == workflow.StatusFailed {
fmt.Printf(" ✗ 数据库保存: 失败 - %s\n", detail.Error)
}
fmt.Println()
}
}
// 使用说明示例
func UsageExample() {
fmt.Println("=== 使用说明 ===")
fmt.Println()
fmt.Println("这个示例展示如何使用img_task工作流保存图像数据到数据库。")
fmt.Println()
fmt.Println("主要步骤:")
fmt.Println("1. 初始化配置和数据库")
fmt.Println("2. 创建数据库容器(包含所有Repository)")
fmt.Println("3. 创建任务管理器(传入数据库容器)")
fmt.Println("4. 添加图像任务")
fmt.Println("5. 监控任务进度")
fmt.Println("6. 验证数据库保存结果")
fmt.Println()
fmt.Println("数据库表:")
fmt.Println("- photos: 保存图像基础信息(路径、哈希、尺寸等)")
fmt.Println("- photo_exif: 保存EXIF元数据信息")
fmt.Println()
fmt.Println("处理流程:")
fmt.Println("1. 验证格式 → 2. 读取文件 → 3. 计算哈希")
fmt.Println("4. 提取EXIF → 5. 格式转换 → 6. 生成缩略图")
fmt.Println("7. 保存数据库 → 8. 智能分析 → 9. 完成")
}
func main() {
UsageExample()
fmt.Println()
ImgTaskDatabaseExample()
}
+2
View File
@@ -6,6 +6,7 @@ type DbContainer struct {
LibraryRepo *repositories.LibraryRepository
UserRepo *repositories.UserService
ExifRepo *repositories.ExifRepository
PhotoRepo *repositories.PhotoRepository
// 其他服务...
}
@@ -14,5 +15,6 @@ func NewContainer() *DbContainer {
LibraryRepo: repositories.NewLibraryRepository(),
UserRepo: repositories.NewUserService(),
ExifRepo: repositories.NewExifRepository(),
PhotoRepo: repositories.NewPhotoRepository(),
}
}
@@ -16,6 +16,6 @@ type TaskContainer struct {
func NewTaskContainer(con *DbContainer) *TaskContainer {
return &TaskContainer{
DbContainer: con,
ImgTaskManager: workflow.NewImgTaskManager(5),
ImgTaskManager: workflow.NewImgTaskManager(5, con.ExifRepo, con.PhotoRepo),
}
}
@@ -0,0 +1,192 @@
package repositories
import (
"path/filepath"
"rear/internal/db"
"rear/internal/model/tables"
"strings"
"gorm.io/gorm"
)
// PhotoRepository 照片数据仓库
type PhotoRepository struct {
db *gorm.DB
}
// NewPhotoRepository 创建照片仓库实例
func NewPhotoRepository() *PhotoRepository {
return &PhotoRepository{
db: db.DB,
}
}
// Create 创建照片记录
func (r *PhotoRepository) Create(photo *tables.Photo) error {
return r.db.Create(photo).Error
}
// GetByHash 根据Hash获取照片信息
func (r *PhotoRepository) GetByHash(hash string) (*tables.Photo, error) {
var photo tables.Photo
err := r.db.Where("hash = ?", hash).First(&photo).Error
if err != nil {
return nil, err
}
return &photo, nil
}
// Update 更新照片记录
func (r *PhotoRepository) Update(photo *tables.Photo) error {
return r.db.Save(photo).Error
}
// Delete 删除照片记录
func (r *PhotoRepository) Delete(hash string) error {
return r.db.Where("hash = ?", hash).Delete(&tables.Photo{}).Error
}
// Exists 检查照片记录是否存在
func (r *PhotoRepository) Exists(hash string) (bool, error) {
var count int64
err := r.db.Model(&tables.Photo{}).Where("hash = ?", hash).Count(&count).Error
return count > 0, err
}
// CreateOrUpdate 创建或更新照片记录
func (r *PhotoRepository) CreateOrUpdate(photo *tables.Photo) error {
// 先检查是否存在
exists, err := r.Exists(photo.Hash)
if err != nil {
return err
}
if exists {
return r.Update(photo)
} else {
return r.Create(photo)
}
}
// GetAll 获取所有照片记录
func (r *PhotoRepository) GetAll(limit int, offset int) ([]*tables.Photo, error) {
var photos []*tables.Photo
err := r.db.Limit(limit).Offset(offset).Find(&photos).Error
return photos, err
}
// GetByPath 根据路径获取照片信息
func (r *PhotoRepository) GetByPath(imgPath string) (*tables.Photo, error) {
var photo tables.Photo
err := r.db.Where("img_path = ?", imgPath).First(&photo).Error
if err != nil {
return nil, err
}
return &photo, nil
}
// BatchCreate 批量创建照片记录
func (r *PhotoRepository) BatchCreate(photos []*tables.Photo) error {
if len(photos) == 0 {
return nil
}
return r.db.CreateInBatches(photos, 100).Error
}
// GetCount 获取总记录数
func (r *PhotoRepository) GetCount() (int64, error) {
var count int64
err := r.db.Model(&tables.Photo{}).Count(&count).Error
return count, err
}
// GetPhotosByFormat 根据格式获取照片
func (r *PhotoRepository) GetPhotosByFormat(format string, limit int, offset int) ([]*tables.Photo, error) {
var photos []*tables.Photo
err := r.db.Where("format = ?", format).
Limit(limit).
Offset(offset).
Find(&photos).Error
return photos, err
}
// GetPhotosBySize 根据文件大小范围获取照片
func (r *PhotoRepository) GetPhotosBySize(minSize, maxSize int64, limit int, offset int) ([]*tables.Photo, error) {
var photos []*tables.Photo
err := r.db.Where("file_size BETWEEN ? AND ?", minSize, maxSize).
Limit(limit).
Offset(offset).
Find(&photos).Error
return photos, err
}
// GetPhotosByDimensions 根据尺寸范围获取照片
func (r *PhotoRepository) GetPhotosByDimensions(minWidth, maxWidth, minHeight, maxHeight int, limit int, offset int) ([]*tables.Photo, error) {
var photos []*tables.Photo
err := r.db.Where("width BETWEEN ? AND ? AND height BETWEEN ? AND ?",
minWidth, maxWidth, minHeight, maxHeight).
Limit(limit).
Offset(offset).
Find(&photos).Error
return photos, err
}
// SearchPhotos 搜索照片
func (r *PhotoRepository) SearchPhotos(keyword string, limit int, offset int) ([]*tables.Photo, error) {
var photos []*tables.Photo
err := r.db.Where("img_name LIKE ? OR img_path LIKE ? OR notes LIKE ?",
"%"+keyword+"%", "%"+keyword+"%", "%"+keyword+"%").
Limit(limit).
Offset(offset).
Find(&photos).Error
return photos, err
}
// GetPhotosByRating 根据评分获取照片
func (r *PhotoRepository) GetPhotosByRating(minRating, maxRating int, limit int, offset int) ([]*tables.Photo, error) {
var photos []*tables.Photo
err := r.db.Where("rating BETWEEN ? AND ?", minRating, maxRating).
Limit(limit).
Offset(offset).
Find(&photos).Error
return photos, err
}
// UpdateViewCount 更新访问次数
func (r *PhotoRepository) UpdateViewCount(hash string) error {
return r.db.Model(&tables.Photo{}).
Where("hash = ?", hash).
UpdateColumns(map[string]interface{}{
"view_count": gorm.Expr("view_count + 1"),
"last_viewed_at": "NOW()",
}).Error
}
// CreatePhotoFromImageAPI 从ImageAPI创建Photo记录
func (r *PhotoRepository) CreatePhotoFromImageAPI(hash, imgPath string, exifData interface{}) *tables.Photo {
// 提取文件名
imgName := filepath.Base(imgPath)
// 提取文件格式
format := strings.ToLower(filepath.Ext(imgPath))
if format != "" && format[0] == '.' {
format = format[1:] // 去掉点号
}
photo := &tables.Photo{
ImgPath: imgPath,
ImgName: imgName,
Hash: hash,
Format: format,
Rating: 0,
ViewCount: 0,
}
// 如果有EXIF数据,提取基础信息
// 这里可以根据实际的EXIF数据结构来填充
// if exifData != nil {
// // 从EXIF数据中提取Width, Height, FileSize等
// }
return photo
}
+81 -13
View File
@@ -7,9 +7,12 @@ import (
"go.uber.org/zap"
"rear/internal/api"
"rear/internal/config"
"rear/internal/model/tables"
"rear/internal/repositories"
"rear/pkg/logger"
"rear/pkg/utils"
"runtime"
"strings"
"sync"
"time"
)
@@ -137,6 +140,10 @@ type PictureTask struct {
UpdateTime time.Time `json:"update_time"` // 最后更新时间
CompletedTime *time.Time `json:"completed_time,omitempty"` // 完成时间
// 数据库仓库
exifRepo *repositories.ExifRepository
photoRepo *repositories.PhotoRepository
ctx context.Context
cancel context.CancelFunc
mu sync.Mutex
@@ -144,7 +151,7 @@ type PictureTask struct {
resumeCh chan struct{}
}
func NewPictureTask(path string) *PictureTask {
func NewPictureTask(path string, exifRepo *repositories.ExifRepository, photoRepo *repositories.PhotoRepository) *PictureTask {
ctx, cancel := context.WithCancel(context.Background())
// 初始化所有步骤信息
@@ -171,6 +178,8 @@ func NewPictureTask(path string) *PictureTask {
AllSteps: allSteps,
StartTime: time.Now(),
UpdateTime: time.Now(),
exifRepo: exifRepo,
photoRepo: photoRepo,
ctx: ctx,
cancel: cancel,
pauseCh: make(chan struct{}, 1),
@@ -349,25 +358,80 @@ func (pt *PictureTask) setStatus(s TaskStatus) {
// saveToDatabase 保存图像信息到数据库
func (pt *PictureTask) saveToDatabase(imageAPI *api.ImageAPI) error {
// TODO: 实现数据库保存逻辑
// 这里应该保存到 photos 表和 photo_exif 表
exifData := imageAPI.GetExifData()
hash := imageAPI.GetHash()
if hash == "" {
return fmt.Errorf("图像哈希值为空")
}
logger.Info("保存图像信息到数据库",
zap.String("hash", hash),
zap.String("path", pt.Path))
// 模拟数据库操作
if exifData != nil {
logger.Debug("EXIF信息",
// 1. 保存EXIF信息到photo_exif表
if exifData != nil && !isExifRepoNil(pt.exifRepo) {
// 创建PhotoExif表记录
photoExif := tables.NewPhotoExifFromParsed(hash, exifData)
// 保存到数据库
err := pt.exifRepo.CreateOrUpdate(photoExif)
if err != nil {
logger.Error("保存EXIF信息失败",
zap.String("hash", hash),
zap.String("path", pt.Path),
zap.Error(err))
return fmt.Errorf("保存EXIF信息失败: %w", err)
}
logger.Info("EXIF信息保存成功",
zap.String("hash", hash),
zap.String("make", exifData.Exif.Make),
zap.String("model", exifData.Exif.Model),
zap.Int("width", exifData.BaseInfo.ImageWidth),
zap.Int("height", exifData.BaseInfo.ImageHeight))
} else {
logger.Warn("没有EXIF数据可保存", zap.String("hash", hash))
}
// 2. 保存Photo基础信息到photos表
if !isPhotoRepoNil(pt.photoRepo) {
photo := pt.photoRepo.CreatePhotoFromImageAPI(hash, pt.Path, exifData)
// 如果有EXIF数据,从中提取基础信息
if exifData != nil {
photo.Width = exifData.BaseInfo.ImageWidth
photo.Height = exifData.BaseInfo.ImageHeight
photo.FileSize = exifData.BaseInfo.FileSize
// 计算宽高比
if photo.Height > 0 {
photo.AspectRatio = float32(photo.Width) / float32(photo.Height)
}
// 设置格式(如果EXIF中有的话)
if exifData.BaseInfo.FileType != "" {
photo.Format = strings.ToLower(exifData.BaseInfo.FileType)
}
}
err := pt.photoRepo.CreateOrUpdate(photo)
if err != nil {
logger.Error("保存Photo信息失败",
zap.String("hash", hash),
zap.String("path", pt.Path),
zap.Error(err))
return fmt.Errorf("保存Photo信息失败: %w", err)
}
logger.Info("Photo信息保存成功",
zap.String("hash", hash),
zap.String("path", pt.Path),
zap.Int("width", photo.Width),
zap.Int("height", photo.Height))
}
logger.Info("图像信息保存完成", zap.String("hash", hash))
return nil
}
@@ -396,9 +460,11 @@ type ImgTaskManager struct {
poolMu sync.Mutex
doneCount int
autoAdjust bool
exifRepo *repositories.ExifRepository
photoRepo *repositories.PhotoRepository
}
func NewImgTaskManager(concurrency int) *ImgTaskManager {
func NewImgTaskManager(concurrency int, exifRepo *repositories.ExifRepository, photoRepo *repositories.PhotoRepository) *ImgTaskManager {
taskConfig := config.GetTaskConfig()
if concurrency <= 0 {
@@ -413,6 +479,8 @@ func NewImgTaskManager(concurrency int) *ImgTaskManager {
globalPause: make(chan struct{}, 1),
globalResume: make(chan struct{}, 1),
autoAdjust: taskConfig.AutoAdjust,
exifRepo: exifRepo,
photoRepo: photoRepo,
}
// 启动工作协程和监控协程
@@ -434,7 +502,7 @@ var (
)
// InitGlobalTaskManager 初始化全局任务管理器
func InitGlobalTaskManager() {
func InitGlobalTaskManager(exifRepo *repositories.ExifRepository, photoRepo *repositories.PhotoRepository) {
taskManagerOnce.Do(func() {
taskConfig := config.GetTaskConfig()
@@ -443,7 +511,7 @@ func InitGlobalTaskManager() {
return
}
globalTaskManager = NewImgTaskManager(taskConfig.Concurrency)
globalTaskManager = NewImgTaskManager(taskConfig.Concurrency, exifRepo, photoRepo)
logger.Info("全局任务管理器已初始化",
zap.Int("concurrency", taskConfig.Concurrency),
zap.Bool("auto_adjust", taskConfig.AutoAdjust))
@@ -453,8 +521,8 @@ func InitGlobalTaskManager() {
// GetGlobalTaskManager 获取全局任务管理器实例
func GetGlobalTaskManager() *ImgTaskManager {
if globalTaskManager == nil {
logger.Warn("全局任务管理器未初始化,正在初始化...")
InitGlobalTaskManager()
logger.Warn("全局任务管理器未初始化")
return nil
}
return globalTaskManager
}
@@ -513,7 +581,7 @@ func (tm *ImgTaskManager) SetConcurrency(n int) {
}
func (tm *ImgTaskManager) AddTask(path string) string {
task := NewPictureTask(path)
task := NewPictureTask(path, tm.exifRepo, tm.photoRepo)
tm.mu.Lock()
tm.tasks[task.ID] = task
tm.mu.Unlock()
@@ -0,0 +1,15 @@
package workflow
import (
"rear/internal/repositories"
)
// isExifRepoNil 检查EXIF仓库是否为nil
func isExifRepoNil(repo *repositories.ExifRepository) bool {
return repo == nil
}
// isPhotoRepoNil 检查Photo仓库是否为nil
func isPhotoRepoNil(repo *repositories.PhotoRepository) bool {
return repo == nil
}
+2
View File
@@ -46,3 +46,5 @@
{"level":"info","time":"2025-08-03 19:33:26.570","caller":"config/config.go:88","msg":"加载配置文件成功","path":"config.yaml"}
{"level":"info","time":"2025-08-03 19:46:30.012","caller":"config/config.go:88","msg":"加载配置文件成功","path":"config.yaml"}
{"level":"info","time":"2025-08-16 13:17:41.764","caller":"config/config.go:88","msg":"加载配置文件成功","path":"config.yaml"}
{"level":"info","time":"2025-08-16 16:05:47.998","caller":"config/config.go:88","msg":"加载配置文件成功","path":"config.yaml"}
{"level":"info","time":"2025-08-16 16:08:27.263","caller":"config/config.go:88","msg":"加载配置文件成功","path":"config.yaml"}
+268
View File
@@ -0,0 +1,268 @@
package utils
import (
"image"
"image/color"
"math"
"sort"
)
type PerceptualHashType int
const (
AHash PerceptualHashType = iota
DHash
PHash
)
type PerceptualHash struct {
Value uint64
Type PerceptualHashType
}
type SimilarResult struct {
Hash1 PerceptualHash
Hash2 PerceptualHash
Similarity float64
}
func CalculateAHash(img image.Image) PerceptualHash {
// 缩放到8x8
resized := resizeImage(img, 8, 8)
// 转换为灰度并计算平均值
pixels := make([]uint8, 64)
var sum uint64
for y := 0; y < 8; y++ {
for x := 0; x < 8; x++ {
gray := rgbaToGray(resized.At(x, y))
pixels[y*8+x] = gray
sum += uint64(gray)
}
}
avg := sum / 64
// 生成哈希值
var hash uint64
for i, pixel := range pixels {
if uint64(pixel) >= avg {
hash |= 1 << (63 - i)
}
}
return PerceptualHash{Value: hash, Type: AHash}
}
func CalculateDHash(img image.Image) PerceptualHash {
// 缩放到9x8 (比较相邻像素需要多一列)
resized := resizeImage(img, 9, 8)
// 转换为灰度
var hash uint64
bitIndex := 0
for y := 0; y < 8; y++ {
for x := 0; x < 8; x++ {
left := rgbaToGray(resized.At(x, y))
right := rgbaToGray(resized.At(x+1, y))
if left < right {
hash |= 1 << (63 - bitIndex)
}
bitIndex++
}
}
return PerceptualHash{Value: hash, Type: DHash}
}
func CalculatePHash(img image.Image) PerceptualHash {
// 缩放到32x32
resized := resizeImage(img, 32, 32)
// 转换为灰度
pixels := make([][]float64, 32)
for i := range pixels {
pixels[i] = make([]float64, 32)
}
for y := 0; y < 32; y++ {
for x := 0; x < 32; x++ {
pixels[y][x] = float64(rgbaToGray(resized.At(x, y)))
}
}
// 计算DCT
dct := computeDCT(pixels)
// 取左上角8x8区域(除了DC分量)
values := make([]float64, 64)
idx := 0
for y := 0; y < 8; y++ {
for x := 0; x < 8; x++ {
if y == 0 && x == 0 {
continue // 跳过DC分量
}
values[idx] = dct[y][x]
idx++
}
}
// 计算中位数
sortedValues := make([]float64, len(values))
copy(sortedValues, values)
sort.Float64s(sortedValues)
median := sortedValues[len(sortedValues)/2]
// 生成哈希值
var hash uint64
idx = 0
for y := 0; y < 8; y++ {
for x := 0; x < 8; x++ {
if y == 0 && x == 0 {
continue
}
if dct[y][x] > median {
hash |= 1 << (63 - idx)
}
idx++
}
}
return PerceptualHash{Value: hash, Type: PHash}
}
func CalculateSimilarity(hash1, hash2 PerceptualHash) float64 {
if hash1.Type != hash2.Type {
return 0.0
}
// 计算汉明距离
xor := hash1.Value ^ hash2.Value
distance := hammingWeight(xor)
// 转换为相似度百分比
similarity := (64.0 - float64(distance)) / 64.0 * 100.0
return math.Max(0, similarity)
}
func FindSimilarHashes(targetHash PerceptualHash, hashes []PerceptualHash, threshold float64) []SimilarResult {
var results []SimilarResult
for _, hash := range hashes {
if hash.Type == targetHash.Type {
similarity := CalculateSimilarity(targetHash, hash)
if similarity >= threshold {
results = append(results, SimilarResult{
Hash1: targetHash,
Hash2: hash,
Similarity: similarity,
})
}
}
}
// 按相似度降序排序
sort.Slice(results, func(i, j int) bool {
return results[i].Similarity > results[j].Similarity
})
return results
}
func FindAllSimilarPairs(hashes []PerceptualHash, threshold float64) []SimilarResult {
var results []SimilarResult
for i := 0; i < len(hashes); i++ {
for j := i + 1; j < len(hashes); j++ {
if hashes[i].Type == hashes[j].Type {
similarity := CalculateSimilarity(hashes[i], hashes[j])
if similarity >= threshold {
results = append(results, SimilarResult{
Hash1: hashes[i],
Hash2: hashes[j],
Similarity: similarity,
})
}
}
}
}
// 按相似度降序排序
sort.Slice(results, func(i, j int) bool {
return results[i].Similarity > results[j].Similarity
})
return results
}
// 辅助函数
func resizeImage(img image.Image, width, height int) image.Image {
bounds := img.Bounds()
srcW, srcH := bounds.Dx(), bounds.Dy()
dst := image.NewRGBA(image.Rect(0, 0, width, height))
for y := 0; y < height; y++ {
for x := 0; x < width; x++ {
srcX := x * srcW / width
srcY := y * srcH / height
dst.Set(x, y, img.At(srcX, srcY))
}
}
return dst
}
func rgbaToGray(c color.Color) uint8 {
r, g, b, _ := c.RGBA()
// 使用标准亮度公式
gray := (299*r + 587*g + 114*b + 500) / 1000
return uint8(gray >> 8)
}
func hammingWeight(x uint64) int {
count := 0
for x != 0 {
count++
x &= x - 1
}
return count
}
func computeDCT(pixels [][]float64) [][]float64 {
size := len(pixels)
dct := make([][]float64, size)
for i := range dct {
dct[i] = make([]float64, size)
}
for u := 0; u < size; u++ {
for v := 0; v < size; v++ {
sum := 0.0
for x := 0; x < size; x++ {
for y := 0; y < size; y++ {
sum += pixels[x][y] *
math.Cos((2*float64(x)+1)*float64(u)*math.Pi/(2*float64(size))) *
math.Cos((2*float64(y)+1)*float64(v)*math.Pi/(2*float64(size)))
}
}
cu := 1.0
if u == 0 {
cu = 1.0 / math.Sqrt(2)
}
cv := 1.0
if v == 0 {
cv = 1.0 / math.Sqrt(2)
}
dct[u][v] = (2.0 / float64(size)) * cu * cv * sum
}
}
return dct
}
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package utils
import (
"image"
"image/color"
"testing"
)
func createTestImage(width, height int, pattern func(x, y int) color.Color) image.Image {
img := image.NewRGBA(image.Rect(0, 0, width, height))
for y := 0; y < height; y++ {
for x := 0; x < width; x++ {
img.Set(x, y, pattern(x, y))
}
}
return img
}
func TestCalculateAHash(t *testing.T) {
// 创建一个简单的测试图像
img := createTestImage(100, 100, func(x, y int) color.Color {
if (x+y)%2 == 0 {
return color.RGBA{255, 255, 255, 255} // 白色
}
return color.RGBA{0, 0, 0, 255} // 黑色
})
hash := CalculateAHash(img)
if hash.Type != AHash {
t.Errorf("Expected hash type %v, got %v", AHash, hash.Type)
}
if hash.Value == 0 {
t.Error("Hash value should not be zero for a patterned image")
}
}
func TestCalculateDHash(t *testing.T) {
// 创建一个渐变图像
img := createTestImage(100, 100, func(x, y int) color.Color {
intensity := uint8(float64(x) / 100.0 * 255)
return color.RGBA{intensity, intensity, intensity, 255}
})
hash := CalculateDHash(img)
if hash.Type != DHash {
t.Errorf("Expected hash type %v, got %v", DHash, hash.Type)
}
if hash.Value == 0 {
t.Error("Hash value should not be zero for a gradient image")
}
}
func TestCalculatePHash(t *testing.T) {
// 创建一个更复杂的测试图像
img := createTestImage(100, 100, func(x, y int) color.Color {
intensity := uint8((x*y) % 256)
return color.RGBA{intensity, intensity, intensity, 255}
})
hash := CalculatePHash(img)
if hash.Type != PHash {
t.Errorf("Expected hash type %v, got %v", PHash, hash.Type)
}
}
func TestCalculateSimilarity(t *testing.T) {
// 创建两个相似的图像
img1 := createTestImage(100, 100, func(x, y int) color.Color {
if x < 50 {
return color.RGBA{255, 255, 255, 255}
}
return color.RGBA{0, 0, 0, 255}
})
img2 := createTestImage(100, 100, func(x, y int) color.Color {
if x < 48 { // 稍微不同
return color.RGBA{255, 255, 255, 255}
}
return color.RGBA{0, 0, 0, 255}
})
hash1 := CalculateAHash(img1)
hash2 := CalculateAHash(img2)
similarity := CalculateSimilarity(hash1, hash2)
if similarity < 50.0 {
t.Errorf("Expected similarity > 50%%, got %f%%", similarity)
}
if similarity > 100.0 {
t.Errorf("Similarity should not exceed 100%%, got %f%%", similarity)
}
}
func TestCalculateSimilarityDifferentTypes(t *testing.T) {
img := createTestImage(100, 100, func(x, y int) color.Color {
return color.RGBA{128, 128, 128, 255}
})
ahash := CalculateAHash(img)
dhash := CalculateDHash(img)
similarity := CalculateSimilarity(ahash, dhash)
if similarity != 0.0 {
t.Errorf("Expected 0%% similarity for different hash types, got %f%%", similarity)
}
}
func TestFindSimilarHashes(t *testing.T) {
// 创建测试图像和哈希
img1 := createTestImage(100, 100, func(x, y int) color.Color {
return color.RGBA{255, 255, 255, 255}
})
img2 := createTestImage(100, 100, func(x, y int) color.Color {
return color.RGBA{250, 250, 250, 255} // 非常相似
})
img3 := createTestImage(100, 100, func(x, y int) color.Color {
return color.RGBA{0, 0, 0, 255} // 完全不同
})
hash1 := CalculateAHash(img1)
hash2 := CalculateAHash(img2)
hash3 := CalculateAHash(img3)
hashes := []PerceptualHash{hash2, hash3}
results := FindSimilarHashes(hash1, hashes, 80.0)
if len(results) == 0 {
t.Error("Expected to find at least one similar hash")
}
// 检查结果是否按相似度排序
for i := 1; i < len(results); i++ {
if results[i-1].Similarity < results[i].Similarity {
t.Error("Results should be sorted by similarity in descending order")
}
}
}
func TestFindAllSimilarPairs(t *testing.T) {
// 创建几个测试哈希
img1 := createTestImage(100, 100, func(x, y int) color.Color {
return color.RGBA{255, 255, 255, 255}
})
img2 := createTestImage(100, 100, func(x, y int) color.Color {
return color.RGBA{250, 250, 250, 255}
})
img3 := createTestImage(100, 100, func(x, y int) color.Color {
return color.RGBA{245, 245, 245, 255}
})
hash1 := CalculateAHash(img1)
hash2 := CalculateAHash(img2)
hash3 := CalculateAHash(img3)
hashes := []PerceptualHash{hash1, hash2, hash3}
results := FindAllSimilarPairs(hashes, 70.0)
if len(results) == 0 {
t.Error("Expected to find similar pairs")
}
// 验证没有重复的配对
seen := make(map[string]bool)
for _, result := range results {
key1 := string(rune(result.Hash1.Value)) + "-" + string(rune(result.Hash2.Value))
key2 := string(rune(result.Hash2.Value)) + "-" + string(rune(result.Hash1.Value))
if seen[key1] || seen[key2] {
t.Error("Found duplicate pair in results")
}
seen[key1] = true
seen[key2] = true
}
}
func TestHammingWeight(t *testing.T) {
tests := []struct {
input uint64
expected int
}{
{0, 0},
{1, 1},
{3, 2}, // 11 in binary
{7, 3}, // 111 in binary
{15, 4}, // 1111 in binary
{0xFFFFFFFFFFFFFFFF, 64}, // all bits set
}
for _, test := range tests {
result := hammingWeight(test.input)
if result != test.expected {
t.Errorf("hammingWeight(%d) = %d; expected %d", test.input, result, test.expected)
}
}
}
func TestRgbaToGray(t *testing.T) {
tests := []struct {
input color.RGBA
expected uint8
}{
{color.RGBA{255, 255, 255, 255}, 255}, // 白色
{color.RGBA{0, 0, 0, 255}, 0}, // 黑色
{color.RGBA{255, 0, 0, 255}, 76}, // 红色
{color.RGBA{0, 255, 0, 255}, 149}, // 绿色
{color.RGBA{0, 0, 255, 255}, 29}, // 蓝色
}
for _, test := range tests {
result := rgbaToGray(test.input)
// 允许一定的误差
if result < test.expected-2 || result > test.expected+2 {
t.Errorf("rgbaToGray(%v) = %d; expected around %d", test.input, result, test.expected)
}
}
}
func BenchmarkCalculateAHash(b *testing.B) {
img := createTestImage(1000, 1000, func(x, y int) color.Color {
return color.RGBA{uint8(x % 256), uint8(y % 256), uint8((x + y) % 256), 255}
})
b.ResetTimer()
for i := 0; i < b.N; i++ {
CalculateAHash(img)
}
}
func BenchmarkCalculateDHash(b *testing.B) {
img := createTestImage(1000, 1000, func(x, y int) color.Color {
return color.RGBA{uint8(x % 256), uint8(y % 256), uint8((x + y) % 256), 255}
})
b.ResetTimer()
for i := 0; i < b.N; i++ {
CalculateDHash(img)
}
}
func BenchmarkCalculatePHash(b *testing.B) {
img := createTestImage(1000, 1000, func(x, y int) color.Color {
return color.RGBA{uint8(x % 256), uint8(y % 256), uint8((x + y) % 256), 255}
})
b.ResetTimer()
for i := 0; i < b.N; i++ {
CalculatePHash(img)
}
}
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