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--- interactive_image_cropping [2025/06/30 22:30] – created admin
+++ interactive_image_cropping [2025/06/30 22:30] (current) – removed 207.241.235.168
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-====== Interactive Image Cropping - Complete Guide ======
-===== Overview =====
-The Interactive Image Cropping system provides precise, real-time image cropping with live preview capabilities. It automatically handles aspect ratio constraints, provides visual feedback, and integrates seamlessly with the model management workflow for optimal image processing.
-===== Key Features =====
-Real-Time Interactive Cropping - Drag, resize, and position crop area visually
-Live Preview - See final result before saving
-Automatic Aspect Ratio - Maintains target dimensions precisely
-Model-Specific Settings - Customizable dimensions per model
-Batch Processing - "Save Cropped & Next" for efficient workflows
-Quality Optimization - Professional-grade image processing
-Format Support - JPEG, PNG, WebP input with JPEG output
-===== How It Works =====
-==== Crop Area Controls ====
-Visual Interface:
-Red Dashed Border - Shows current crop selection
-Corner Handles - Drag to resize crop area
-Move Area - Click and drag center to reposition
-Aspect Ratio Lock - Automatically maintains target proportions
-Mouse Controls:
-Click and Drag - Move crop area
-Corner Dragging - Resize while maintaining aspect ratio
-Double-Click - Quick save (with "Save Cropped & Next")
-Mouse Wheel - Fine positioning (if supported)
-==== Live Preview System ====
-Real-Time Updates:
-Preview updates instantly as you adjust crop area
-Shows exact final image at target dimensions
-Displays actual pixel dimensions
-Provides visual feedback for quality assessment
-===== Getting Started =====
-==== Prerequisites ====
-Uploaded Image - Image must be in uploads directory
-Model Configuration - Target dimensions set for model
-Browser Support - Modern browser with JavaScript enabled
-File Permissions - Write access to models directory
-==== Accessing the Cropper ====
-From Image Selector:
-Select image in AI Image Selector
-Click "Select & Crop" button
-Automatic redirect to cropping interface
-From Upload:
-Upload image through upload interface
-Automatic redirect to cropping interface
-Image temporarily stored in uploads folder
-===== Interface Layout =====
-==== Header Section ====
-Navigation Links:
-<< Back to Models - Return to main models page
-< Back to Upload - Return to upload interface
-Control Panel Home - Main admin dashboard
-Information Display:
-Target Size - Configured dimensions for this model
-Original Size - Source image dimensions
-Instructions - Quick usage guide
-==== Main Content Area ====
-Left Panel - Image Canvas:
-Source Image - Scaled for display if necessary
-Crop Overlay - Interactive red selection box
-Scale Indicator - Shows if image is scaled for display
-Right Panel - Preview & Controls:
-Live Preview - Real-time crop result
-Coordinate Display - Current crop position and size
-Target Information - Final dimensions and aspect ratio
-==== Button Bar ====
-Located at the top for easy access:
-Save Cropped Image - Save and return to models
-Save Cropped & Next - Save and process next model
-Reset Crop - Return to default crop area
-Cancel - Abort without saving
-===== Cropping Process =====
-==== Step 1: Initial Setup ====
-Automatic Initialization:
-System calculates optimal initial crop area
-Centers crop in image with maximum size
-Maintains target aspect ratio from start
-Displays current coordinates and dimensions
-==== Step 2: Adjust Crop Area ====
-Positioning:
-Click and drag the crop area to move it
-Use corner handles to resize
-Maintain aspect ratio automatically
-Stay within image boundaries
-Fine-Tuning:
-Use coordinate display for precise positioning
-Preview updates in real-time
-Adjust for optimal composition
-Consider subject positioning
-==== Step 3: Validate and Save ====
-Quality Check:
-Review live preview for quality
-Ensure subject is properly framed
-Check for any cropping artifacts
-Verify dimensions meet requirements
-Save Options:
-Regular Save - Complete current model and return
-Save & Next - Batch processing to next model
-Reset - Start over with new crop area
-===== Advanced Features =====
-==== Model-Specific Dimensions ====
-Configuration:
-Each model can have custom target dimensions
-Default fallback: 260×400 pixels (configurable)
-Minimum dimensions enforced: 50×50 pixels
-Aspect ratio calculated automatically
-Database Integration:
-''model_image_width'' field - Custom width
-''model_image_height'' field - Custom height
-Global defaults from ''$MODWSIZE'' and ''$MODHSIZE''
-Runtime validation and adjustment
-==== Image Processing Pipeline ====
-Input Handling:
-Multi-Format Support - JPEG, PNG, WebP, GIF
-Automatic Detection - MIME type validation
-Error Handling - Graceful failure for invalid files
-Memory Management - Efficient processing of large images
-Output Processing:
-Format Standardization - Always outputs JPEG
-Quality Optimization - 85% JPEG quality setting
-Transparency Handling - Proper alpha channel management
-File Naming - Automatic filename generation based on model name
-==== Batch Processing Integration ====
-"Save Cropped & Next" Workflow:
-Saves current cropped image
-Updates database: ''image_processed = 1''
-Queries for next unprocessed model
-Automatically redirects to AI Image Selector for next model
-Shows completion message when all models processed
-===== Technical Specifications =====
-==== Image Requirements ====
-^ Parameter ^ Minimum ^ Recommended ^ Maximum ^
-| Width | 50px | 500px | 5000px |
-| Height | 50px | 700px | 7000px |
-| File Size | 1KB | 100KB-1MB | 50MB |
-| Formats | JPEG | JPEG, PNG | JPEG, PNG, WebP |
-==== Output Specifications ====
-Format: JPEG (always)
-Quality: 85% compression
-Color Space: RGB
-Metadata: Preserved where possible
-Naming: Based on model name with conflict resolution
-==== Browser Compatibility ====
-^ Feature ^ Requirements ^ Fallback ^
-| Drag & Drop | Modern browser | Manual coordinates |
-| Live Preview | Canvas support | Static preview |
-| Real-time Updates | JavaScript enabled | Manual refresh |
-| File API | HTML5 support | Server-side processing |
-===== Troubleshooting =====
-==== Common Issues ====
-"Image failed to load"
-Check file exists in uploads directory
-Verify file permissions are correct
-Ensure file is valid image format
-Check for corrupt image data
-"Invalid crop dimensions"
-Crop area too small (minimum 10×10 pixels)
-Crop area extends outside image bounds
-Aspect ratio calculation errors
-Browser JavaScript errors
-"Failed to save cropped image"
-Write permissions on models directory
-Disk space insufficient
-Invalid target filename
-Database connection issues
-"Preview not updating"
-JavaScript disabled or errors
-Browser compatibility issues
-Image loading failures
-Canvas rendering problems
-==== Error Recovery ====
-File Issues:
-Check upload directory: ''../../uploads/''
-Verify file exists and is readable
-Re-upload image if corrupted
-Check file size limits
-Permission Issues:
-Ensure models directory writable: ''../images/models/''
-Check PHP permissions
-Verify directory exists
-Create directory if missing
-JavaScript Issues:
-Enable JavaScript in browser
-Check browser console for errors
-Try refreshing the page
-Use different browser if needed
-===== Keyboard Shortcuts =====
-==== Navigation ====
-Escape - Cancel current operation
-Enter - Save current crop (when focused)
-Space - Toggle preview update
-Tab - Navigate between controls
-==== Crop Adjustment ====
-Arrow Keys - Fine-tune crop position (1px increments)
-Shift + Arrow - Larger position adjustments (10px increments)
-Ctrl + Arrow - Resize crop area
-Alt + Arrow - Maintain aspect ratio while resizing
-===== Best Practices =====
-==== Image Selection ====
-Choose High Resolution - Start with largest available image
-Consider Composition - Subject centered and well-framed
-Check Quality - Avoid blurry or pixelated sources
-Aspect Ratio - Match target proportions when possible
-==== Cropping Technique ====
-Focus on Subject - Center main subject in crop area
-Leave Breathing Room - Don't crop too tightly
-Check Preview - Use live preview for final validation
-Consider Usage - How image will be displayed
-==== Workflow Optimization ====
-Use Batch Mode - Process multiple models efficiently
-Consistent Standards - Maintain similar cropping style
-Quality Control - Review results before moving on
-Backup Originals - Keep source images when possible
-===== Integration Features =====
-==== Database Updates ====
-Model Record Updates:
-''model_image'' field - New filename
-''image_processed'' flag - Set to 1
-''updated_at'' timestamp - Current time
-File cleanup - Remove old images if different
-File Management:
-Automatic Naming - Based on model name
-Conflict Resolution - Numbered suffixes for duplicates
-Cleanup - Remove temporary upload files
-Permission Setting - Proper file permissions
-==== Workflow Integration ====
-Return URL Handling:
-Maintains navigation context
-Returns to appropriate page after completion
-Preserves query parameters
-Context-aware messaging
-Batch Processing:
-Seamless flow between models
-Progress tracking
-Completion notifications
-Error handling throughout process
-===== Performance Optimization =====
-==== Client-Side ====
-Image Scaling - Display optimization for large images
-Canvas Efficiency - Optimized rendering pipeline
-Event Throttling - Smooth interaction response
-Memory Management - Proper cleanup of image data
-==== Server-Side ====
-Image Processing - Efficient GD library usage
-File I/O - Optimized read/write operations
-Database Queries - Prepared statements for security
-Error Handling - Graceful failure recovery
-===== Security Considerations =====
-==== File Security ====
-Upload Validation - Strict file type checking
-Path Traversal - Prevented through validation
-File Size Limits - Configurable maximums
-Virus Scanning - Recommended for uploads
-==== Access Control ====
-Authentication - Category 3 access required
-IP Restrictions - Configurable access limits
-Session Management - Secure session handling
-CSRF Protection - Form token validation
-===== Support Resources =====
-==== Help Resources ====
-Official Forum - [[https://www.comusthumbz.com/forums/|Community Support]]
-Video Tutorials - Step-by-step guides
-FAQ Section - Common questions answered
-Documentation Updates - Regular feature additions
-==== Technical Support ====
-Error Logs - Check browser console and server logs
-System Requirements - Verify compatibility
-Configuration Help - Server setup assistance
-Custom Development - Modification services available
-//Last updated: 2025-06-30//