Image BLOB to image

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Cha Yong Jong
Cha Yong Jong am 8 Mär. 2023
Kommentiert: Cha Yong Jong am 13 Mär. 2023
I have a db file, which stores images. I use sqlite to fetch the db file, resulting in single columns vector (uint8) for every image. The vector size of every image are different which i believe is compressed by BLOB algorithms. Any ideas on how to generate human-readable image from these vectors
Below is the data for 8 images. Can't use reshape because the numbers can't be sqrt. In fact, they are all same size- squared images.

Antworten (1)

Image Analyst
Image Analyst am 8 Mär. 2023
As you can see they are not all the same size, assuming those are the decompressed sizes. You should be able to use sqrt if they are really square images.
ans = 811.3785
but from the last size, you can see the images are not square. Basically you will have to know the format of your vectors, like the number of rows, columns, and number of color channels each vector encodes. And if you retrieved a vector of bytes that is still compressed, you will have to decompress it first.
  3 Kommentare
Cha Yong Jong
Cha Yong Jong am 13 Mär. 2023
Glad to have your reply. But the aim of this query is to request for decompression algorithm suggestion as i searched through i dont find any useful. Thanks

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