I have a Folder with subfolders of images. The subfolders consist of .JPG, .jpg and .jfif, I need them all to be converted to a single format and returned to their folders?

imds = imageDatastore('batch_9','IncludeSubfolders',true,'LabelSource','foldernames');

segIm = pixelLabelDatastore('PixelLabelData');

Error using imageDatastore (line 139)

Input folders or files contain non-standard file extensions.

Use FileExtensions Name-Value pair to include the non-standard file extensions.

Error in Segmenattion (line 9)

imds = imageDatastore('batch_9','IncludeSubfolders',true,'LabelSource','foldernames');

I have a labelled pixel data for sematic segmenattion but the images that I have manually segmented are different formats so I cannot create an imageDataStore from the image files so that I can train a sematic segmentation network. Does anyone know how to change the file format of each image in the subfolders of batch_9 and replace them with the new common image files to their original folders?

[Walter Roberson]

https://www.mathworks.com/matlabcentral/fileexchange/90840-jpeg-baseline-matlab-code might help with the jfif perhaps

Answer 1

[Image Analyst]

imformats

 
EXT       ISA     INFO        READ      WRITE     ALPHA  DESCRIPTION                     
-----------------------------------------------------------------------------------------
bmp       isbmp   imbmpinfo   readbmp   writebmp  0      Windows Bitmap
cur       iscur   imcurinfo   readcur             1      Windows Cursor resources
fts fits  isfits  imfitsinfo  readfits            0      Flexible Image Transport System
gif       isgif   imgifinfo   readgif   writegif  0      Graphics Interchange Format
hdf       ishdf   imhdfinfo   readhdf   writehdf  0      Hierarchical Data Format
ico       isico   imicoinfo   readico             1      Windows Icon resources
j2c j2k   isjp2   imjp2info   readjp2   writej2c  0      JPEG 2000 (raw codestream)
jp2       isjp2   imjp2info   readjp2   writejp2  0      JPEG 2000 (Part 1)
jpf jpx   isjp2   imjp2info   readjp2             0      JPEG 2000 (Part 2)
jpg jpeg  isjpg   imjpginfo   readjpg   writejpg  0      Joint Photographic Experts Group
pbm       ispbm   impnminfo   readpnm   writepnm  0      Portable Bitmap
pcx       ispcx   impcxinfo   readpcx   writepcx  0      Windows Paintbrush
pgm       ispgm   impnminfo   readpnm   writepnm  0      Portable Graymap
png       ispng   impnginfo   readpng   writepng  1      Portable Network Graphics
pnm       ispnm   impnminfo   readpnm   writepnm  0      Portable Any Map
ppm       isppm   impnminfo   readpnm   writepnm  0      Portable Pixmap
ras       isras   imrasinfo   readras   writeras  1      Sun Raster
svs       istif   imtifinfo   readtif             0      Aperio ScanScope Virtual Slide
tif tiff  istif   imtifinfo   readtif   writetif  0      Tagged Image File Format
xwd       isxwd   imxwdinfo   readxwd   writexwd  0      X Window Dump

You may have to find a third party program like ImageMagick or something to convert jfif.

Answer 2

[DGM]

At least with the JFIF files I have, imread() has no problem reading them. imageDatastore() ignores them, but throws no error (maybe version differences). If I use the 'fileextensions' option as the message suggests, it picks them up and reads them just fine. Using readimage() works fine on them.

fext = {'.jpg','.jfif'}; % case-insensitive
imds = imageDatastore('./','IncludeSubfolders',false,'fileextensions',fext);

I haven't run across any files that have any issues with this, but maybe it's possible.