wanna filter for books w/ color images (exclude cover, publisher logo)

droopy · 08-10-2020, 03:31 PM

How can I search for just those books (epubs) that have images, but not just any type of image, but full-color images?

Here's why I ask. For those books with full-color pictures/illustrations/artwork, I'll tag them as such and make sure to forego reading them on my Kobo Reader. I'll read these books on my laptop or a tablet.

On my Kobo Forma reader, I want just those books with black-and-white or grayscale images.

I don't mind if the only thing with color is the book's cover -- they can enter my Kobo Forma.

I also don't mind if an additional thing with color is the publisher's logo. For example, the orange oval that surrounds the PenguinRandomHouse's penguin or HarperCollins red-over-blue torch logo. These things can come into my ereader too.

theducks · 08-10-2020, 03:56 PM

Good luck. Not everyone codes the image with the minimum color depth (bits).
You can have a 16 bit image file that only uses 2 colors (B & W)
In reality, you would need to unpack each book. Test (get properties) each image file

08-10-2020, 03:31 PM	#1
droopy Guru Posts: 834 Karma: 2912460 Join Date: Apr 2009 Device: Kobo Forma	wanna filter for books w/ color images (exclude cover, publisher logo) How can I search for just those books (epubs) that have images, but not just any type of image, but full-color images? Here's why I ask. For those books with full-color pictures/illustrations/artwork, I'll tag them as such and make sure to forego reading them on my Kobo Reader. I'll read these books on my laptop or a tablet. On my Kobo Forma reader, I want just those books with black-and-white or grayscale images. I don't mind if the only thing with color is the book's cover -- they can enter my Kobo Forma. I also don't mind if an additional thing with color is the publisher's logo. For example, the orange oval that surrounds the PenguinRandomHouse's penguin or HarperCollins red-over-blue torch logo. These things can come into my ereader too. Last edited by droopy; 08-10-2020 at 04:34 PM.

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08-10-2020, 03:56 PM	#2
theducks Well trained by Cats Posts: 31,251 Karma: 61360164 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	Good luck. Not everyone codes the image with the minimum color depth (bits). You can have a 16 bit image file that only uses 2 colors (B & W) In reality, you would need to unpack each book. Test (get properties) each image file