read tiff file and identify it's compression type using c++ (photoshop SDK)

Forum|Forum|6 years ago
March 5, 2019
2 replies
2112 views

Can any let me know how to read a tiff file and identify it's compression mode (LZW, JPEG, etc..) using photoshop sdk c++?

This topic has been closed for replies.

L

loading99

Participant

Checks the compression of tif.

void checkCompression(TIFF* tif) {
    uint16_t compression;
    TIFFGetField(tif, TIFFTAG_COMPRESSION, &compression);

    const TIFFCodec* codec = TIFFFindCODEC(compression);
    if (codec != NULL) {
        printf("Codec for compression method %u is %s\n", compression, codec->name);
    } else {
        printf("Codec for compression method %u not found\n", compression);
    }
}

Tom Ruark

Inspiring

I believe a TIFF file can have multiple images in it. And a PSD (Photoshop file) has a tag for TIFF for all the interesting things.

https://www.itu.int/itudoc/itu-t/com16/tiff-fx/docs/tiff6.pdf

Adobe Photoshop File Formats Specification

S

sks271994Author

Known Participant

I am able to get the compression type form the meta data. which i'm currently doing. But there are cases where the meta data is not populated with this information, for e.g. If i export an art as tiff from Illustrator and open the file in photoshop the metadata is not populated with the compression type. So in order to get this info i need to save the document again in photoshop and open the saved image for processing. So I am wondering if i have any c API to retrieve the compression type, then i can have one less problem.

So Can some one post some ways to get image compression type using PSD c++ API.

T

Test Screen Name

Legend

Check out libtiff.

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