Tính hash ảnh
Generate perceptual hashes to find duplicate or similar images. Compare two images to check similarity.
Tải ảnh lên để tính hash
Kéo thả ảnh vào đây
Generating hash...
First Image
Click to upload
Second Image
Click to upload
Image Hash Values
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Image 1
Image 2
pHash Similarity
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dHash Similarity
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aHash Similarity
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// Frequently Asked Questions
What is a perceptual hash?
A perceptual hash (pHash) is a fingerprint based on image appearance, not exact pixels. Similar-looking images have similar hashes, making it useful for finding duplicates even after resizing or minor edits.
What do the different hash types mean?
pHash: Best for photos, robust to minor changes. dHash: Fast, good for gradient detection. aHash: Simple average-based, good for quick comparisons.
How accurate is the similarity detection?
90%+ similarity usually means identical or near-identical images. 75-90% suggests similar images with minor differences. Below 75% typically means different images.