chris/scry

2026-02-05 09:41:07 +01:00

5.3 KiB

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Test Images

This directory contains 225 reference images for testing card recognition algorithms without requiring actual hardware.

Directory Structure

Category	Count	Description
`reference_alpha/`	47	Alpha edition reference cards (old frame)
`varying_quality/`	38	Different lighting, blur, exposure, angles
`single_cards/`	19	Individual card photos
`real_photos/`	18	Phone camera photos from Visions project
`foreign/`	16	Non-English cards (Japanese, German, French, etc.)
`worn/`	15	Heavily played, damaged, worn cards
`foil/`	14	Foil cards with holographic glare/reflections
`low_light/`	14	Poor lighting, glare, shadows, amateur photos
`tokens/`	13	Tokens and planeswalker emblems
`hands/`	11	Cards held in hand (partial visibility)
`ocr_test/`	10	Images optimized for OCR testing
`reference/`	9	High-quality reference scans
`multiple_cards/`	6	Multiple cards in frame
`augmented/`	4	Augmented training examples
`training_examples/`	3	ML training set samples
`angled/`	2	Perspective distortion

Image Sources

Images from open-source MIT-licensed projects:

Additional images from:

Reddit r/magicTCG (user-submitted photos)
Flickr (Creative Commons)
Card Kingdom / Face to Face Games grading guides
Scryfall (foreign language card scans)

Usage

[Theory]
[InlineData("varying_quality/test1.jpg")]
[InlineData("angled/tilted_card_1.jpg")]
[InlineData("hands/hand_of_card_1.png")]
[InlineData("foil/rainbow_foil_secret_lair.jpg")]
[InlineData("worn/hp_shuffle_crease.webp")]
[InlineData("foreign/japanese_aang.jpg")]
public async Task RecognizeCard_VaryingConditions(string imagePath)
{
    using var stream = File.OpenRead(Path.Combine("TestImages", imagePath));
    var result = await _recognitionService.RecognizeCardAsync(stream);
    
    Assert.True(result.Success);
    Assert.NotNull(result.Card);
    Assert.True(result.Confidence >= 0.7f);
}

Category Details

foil/

Foil cards showing holographic effects that challenge recognition:

Rainbow foils with color-shifting (rainbow_foil_secret_lair.jpg)
Surge foils with holo stickers (surge_foils_holo.jpeg)
Old-style foils (old_foil_yawgmoth.jpg)
Textured/dragonscale foils (dragonscale_foil.jpg)
Foil curling examples showing warping

worn/

Heavily played and damaged cards:

Edge whitening (edge_white.png, very_good_*.jpg)
Scratches and scuffs (scratch.png, hp_scratches.png)
Creases and bends (hp_shuffle_crease.webp, bent_creased.jpg)
Binder damage (hp_binder_bite_*.webp)
Water damage (hp_water_warping.png)
Corner damage (hp_compromised_corner.webp)

low_light/

Poor lighting and amateur photography conditions:

Glare from toploaders/sleeves (glare_toploader.png)
Direct light causing hotspots (glare_straight_down.jpg)
Depth of field blur (dof_blur_amateur.jpg)
Amateur condition photos with shadows
Flickr collection shots with mixed lighting

foreign/

Non-English cards (8 languages):

Japanese (日本語)
German (Deutsch)
French (Français)
Italian (Italiano)
Spanish (Español)
Russian (Русский)
Simplified Chinese (简体中文)
Korean (한국어)

tokens/

Tokens and planeswalker emblems:

Official WotC tokens
Custom/altered tokens
Planeswalker emblems (Elspeth, Gideon, Narset)
Token collections and gameplay shots

varying_quality/

Images with various real-world challenges:

Different camera exposures
BGS graded cases (counterspell_bgs.jpg)
Cards in plastic sleeves (card_in_plastic_case.jpg)
Various lighting conditions
28 numbered test images (test1.jpg - test27.jpg)

reference_alpha/

47 Limited Edition Alpha cards for old-frame recognition:

Power Nine (Black Lotus, Ancestral Recall, Moxen, etc.)
Dual lands (Underground Sea, Volcanic Island, etc.)
Classic staples (Lightning Bolt, Counterspell, Sol Ring)

hands/

Cards held in hand - partial visibility, stacked:

Various deck archetypes (Tron, Green, Red)
New and old frame cards
Different lighting conditions

real_photos/

Phone camera photos from Visions project:

Real-world scanning conditions
Various resolutions and crops
Includes processed result images

ocr_test/

From CardScanner project, graded by difficulty:

card0-4.jpg: Easier recognition
card10-13.jpg: Harder recognition (noted ~less accuracy)

TODO: Additional Categories Needed

double_faced/ - Transform/MDFC cards (both sides)
art_cards/ - Art series cards without text boxes
promos/ - Extended art, borderless, showcase frames
very_low_light/ - Near-dark conditions
motion_blur/ - Cards in motion during scanning

License

Card artwork is property of Wizards of the Coast. Images used for testing/research purposes only.

5.3 KiB Raw Blame History