[Phân tích] Khám phá bỉ ẩn sau file ảnh của bạn

Có rất nhiều thông tin ẩn chứa sau 1 bức ảnh.
Bạn tự khám phá nhé, mình sẽ hướng dẫn:

1. Công cụ

http://regex.info//exif.cgi
http://www.imagemagick.org/script/index.php
http://www.sno.phy.queensu.ca/~phil/exiftool/
http://www.flickr.com/groups/stolencamerafinder/

2. Demo

Kết quả:

Basic Image Information

File Comment:	CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), quality = 95
File:	470 × 511 JPEG 44,610 bytes (0.043 megabytes)     Image compression: 94%
Color Encoding:	Embedded color profile: “sRGB”
Image URL:	https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhNYZVyYXPNfIozV7NmtuhyXqbrUwTbhkVSTj5azooO12b8hpg_HDHWbC3WY6Sdbl7SivezQWejAxtmQEtU4rlQnzZUX9GDDxcKz68-NNdu3320vxIUrGudHOR0SNgjm8uSzJOvwDvbTzEY/s1600/toiphammaytinh.jpg

JFIF

JFIF Version	1.01
Resolution	72 pixels/inch

File — basic information derived from the file.

File Type	JPEG
MIME Type	image/jpeg
Comment	CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), quality = 95
Encoding Process	Baseline DCT, Huffman coding
Bits Per Sample	8
Color Components	3
File Size	44 kB
Image Size	511 × 470
Y Cb Cr Sub Sampling	YCbCr4:2:0 (2 2)

ICC_Profile — this block of data describes the color space used to encode pixel colors.   3.0k-bytes (3,048 bytes).
It is a second-generation sRGB color profile, with black-point scaling. It is the sRGB_IEC61966-2-1_black_scaled.icc mentioned on this ICC page.

Profile CMM Type
Profile Version	2.0.0
Profile Class	Display Device Profile
Color Space Data	RGB
Profile Connection Space	XYZ
Profile Date Time	2009:03:27 21:36:31 2 years, 2 months, 2 days, 5 hours, 27 minutes, 27 seconds ago
Profile File Signature	acsp
Primary Platform	Unknown ()
CMM Flags	Not Embedded, Independent
Device Manufacturer
Device Model
Device Attributes	Reflective, Glossy, Positive, Color
Rendering Intent	Perceptual
Connection Space Illuminant	0.9642 1 0.82491
Profile Creator
Profile ID	29f83ddeaff255ae7842fae4ca83390d
Profile Description	sRGB IEC61966-2-1 black scaled
Blue Matrix Column	0.14307 0.06061 0.7141
Blue Tone Reproduction Curve	(2,060 bytes binary data)
Device Model Desc	IEC 61966-2-1 Default RGB Colour Space - sRGB
Green Matrix Column	0.38515 0.71687 0.09708
Green Tone Reproduction Curve	(2,060 bytes binary data)
Luminance	0 80 0
Measurement Observer	CIE 1931
Measurement Backing	0 0 0
Measurement Geometry	Unknown (0)
Measurement Flare	0%
Measurement Illuminant	D65
Media Black Point	0.01205 0.0125 0.01031
Red Matrix Column	0.43607 0.22249 0.01392
Red Tone Reproduction Curve	(2,060 bytes binary data)
Technology	Cathode Ray Tube Display
Viewing Cond Desc	Reference Viewing Condition in IEC 61966-2-1
Media White Point	0.9642 1 0.82491
Profile Copyright	Copyright International Color Consortium, 2009
Chromatic Adaptation	1.04791 0.02293 -0.0502 0.0296 0.99046 -0.01707 -0.00925 0.01506 0.75179