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Main - Posts by Lectem


Lectem
Posted on 10-25-15 02:55 PM, in JPEG Signatures (rev. 3 of 10-25-15 03:06 PM) Link | #566
Posted by StapleButter
I remember trying to feed a custom-made image into my 3DS and it would read it fine.


I can confirm this at least for MPO files (3d images, basicly 2jpegs with special exif markers).

EDIT: Just confirmed it, any JPEG file works as long as it follows the naming convention of the camera app.
It might vary from a 3DS to another, but for me it is /DCIM/100NIN03/HNI_XXXX.jpg(or .mpo)

EDIT2:

this is the full output of exiftool using your DSi jpeg including unknown markers :

ExifTool Version Number : 9.89
File Name : DSiCameraSampleImage.jpg
Directory : .
File Size : 70 kB
File Modification Date/Time : 2015:10:25 15:00:43-04:00
File Access Date/Time : 2015:10:25 15:00:43-04:00
File Creation Date/Time : 2015:10:25 15:00:43-04:00
File Permissions : rw-rw-rw-
File Type : JPEG
MIME Type : image/jpeg
Exif Byte Order : Big-endian (Motorola, MM)
Make : Nintendo
Camera Model Name : NintendoDS
X Resolution : 72
Y Resolution : 72
Resolution Unit : inches
Software : EINH
Modify Date : 2009:05:23 04:32:38
Y Cb Cr Positioning : Co-sited
Exif Version : 0220
Date/Time Original : 2009:05:23 04:32:38
Create Date : 2009:05:23 04:32:38
Components Configuration : Y, Cb, Cr, -
Nintendo 0x1000 : õ.;..¤¨ë0uö`éÕW¯ÜÎç|š&Ϧü)é
Nintendo 0x1001 :
Flashpix Version : 0100
Color Space : sRGB
Exif Image Width : 640
Exif Image Height : 480
Interoperability Index : R98 - DCF basic file (sRGB)
Interoperability Version : 0100
Related Image File Format : JPEG Exif Ver 2.2
Compression : JPEG (old-style)
Thumbnail Offset : 584
Thumbnail Length : 4674
Image Width : 640
Image Height : 480
Encoding Process : Baseline DCT, Huffman coding
Bits Per Sample : 8
Color Components : 3
Y Cb Cr Sub Sampling : YCbCr4:2:2 (2 1)
Image Size : 640x480
Megapixels : 0.307
Thumbnail Image : (Binary data 4674 bytes, use -b option to extract)

Lectem
Posted on 10-25-15 06:06 PM, in JPEG Signatures Link | #568
So I just tested again, a JPEG with no EXIF information can be displayed fine as long as its size is not too big (600x450 is fine on 3ds). Some big images will not be listed. (by big, I mean around 1200x800)
This is with an old3ds 9.2

Lectem
Posted on 10-26-15 08:58 AM, in 4dsdev cosmetics thread Link | #575
Posted by nocash
I've been just wondering why the "4Ds-dev" logo is loading so slowly. There seems to be something wrong with the filesize:
193Kbyte = current "4ds.png" file
145Kbyte = same image saved as ".bmp" file via IrfanView at 24bpp
50Kbyte = same image saved as ".bmp" file via IrfanView at 8bpp
38Kbyte = same image saved as ".png" file via IrfanView
18Kbyte = same image saved as ".gif" file via IrfanView
Looks as if the 193K file contains plain uncompressed 32bit RGBA pixels, ie. 491*100 pixels * 4 bytes.

http://pnggauntlet.com/ is your friend


Main - Posts by Lectem

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