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Show HN: Creating custom coloring pages from photos. Great for parents/teachers

portraitart.app

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Re: Show HN: Creating custom coloring pages from photos. Great for parents/teachers

#21

Post by YeahThisIsMe »

gnabgib wrote: post #8

Feels more likely this is the opposite - the "originals" look like hallucinations.. what is the rear suspension attached to on this "bmw"[0]? Presumably it's supposed to be an R60[1]. It magically has a lot more (accurate) parts in the colouring page[2] (bigger front and back fender, seat, engine gets fins, frame changed shape, tail has license plate holder and signals, the front brake is connected to the leaver via…

The suspension is attached to the rounded bar next to it. You can find more pictures of it using Google.

Re: Show HN: Creating custom coloring pages from photos. Great for parents/teachers

#22

Post by jotaen »

gnabgib wrote: post #8

Feels more likely this is the opposite - the "originals" look like hallucinations.. what is the rear suspension attached to on this "bmw"[0]? Presumably it's supposed to be an R60[1]. It magically has a lot more (accurate) parts in the colouring page[2] (bigger front and back fender, seat, engine gets fins, frame changed shape, tail has license plate holder and signals, the front brake is connected to the leaver via…

The BMW R60 image appears to be CGI / 3D-rendered. If you zoom in on the original[1], you can see how the rear suspension is attached.

[1]: https://www.pexels.com/photo/orange-and-black-bmw-motorcycle...

Re: Show HN: Creating custom coloring pages from photos. Great for parents/teachers

#24

Post by barishnamazov »

stevels wrote: post #15
jakewins wrote: post #11

Earlier quoted context omitted.

I think this is just a thin wrapper around GPT-4 or similar? Parents I know have replaced colouring books by just asking GPT-4 , and the colouring pages it generates look exactly like the example outputs here.

Those coloring books are generated by text prompting. Here we let you create coloring pages from your own photos. Related but different.

GPT-4 supports images as input.

Re: Show HN: Creating custom coloring pages from photos. Great for parents/teachers

#26

Post by vidarh »

My immediate issue, as the father of a mixed son who has just witnessed him spend hours trying to represent his own appearance accurately for an art task at school:

This turns black and mixed people into white-presenting caricatures of themselves. E.g. compare [1] and [2] where the hairstyles of the black people are turned into distinctly "white" hairstyles. My son's hair is closer in texture to that of the man on the right, and there's no way of getting it into the shape of the coloring-in page.

I get there's no ill intent here, but even for far less ethnically ambiguous inputs this "whitewashes" hairstyles and general appearance, and once I saw it I couldn't unsee it.

If my son was the age to want to use this, I'd be concerned about letting him use this, because I know he is sensitive about how he is different to his friends, etc. and this would wildly misrepresent and erase his actual appearance.

[3] and [4] is another stark example.

[5] and [6]....

[1] https://portraitart.app/static/gallery/group1_original_1024....

[2] https://portraitart.app/static/gallery/group1_coloring_page_...

[3] https://portraitart.app/static/gallery/portrait4_original_10...

[4] https://portraitart.app/static/gallery/portrait4_coloring_pa...

[5] https://portraitart.app/static/gallery/basketball2_original_...

[6] https://portraitart.app/static/gallery/basketball2_coloring_...

Re: Show HN: Creating custom coloring pages from photos. Great for parents/teachers

#27

Post by kitchen_sink »

When I was just starting out I made a similar app (https://github.com/rmdocherty/buck3t) using classic computer vision operations like k-means and Canny edge detection rather than (I assume) ML. It also lets you fill in the returned coloring page in the browser.

It’s simple and works relatively well but is prone to fail on high frequency objects like foliage, where the ML approach appears to a) succeed and b) stylise (seems to cause problems).

The free trial on the cloud function expired so the web app doesn’t work and the source JS code is awful but someone (maybe me) could pretty easily rewrite the cloud function into a flask server to allow local hosting.

Re: Show HN: Creating custom coloring pages from photos. Great for parents/teachers

#28

Post by wiradikusuma »

Tangentially related, I want to make a comic strip. I have some questions for people knowledgeable in "prompt engineering":

1. What's the style name for dilbert-like comic strips? Comic? Line art?

2. How do I produce consistent characters throughout the "comic box" and episodes?

3. How do I hint the generation of the comic? E.g. I draw a stick figure of someone sitting, and it generates my character with that pose.

4. How do I "refine" some parts of the generated image. For example I like the generated character, but I want the face to look different direction.

Re: Show HN: Creating custom coloring pages from photos. Great for parents/teachers

#29

Post by Zetobal »

wiradikusuma wrote: post #28

Tangentially related, I want to make a comic strip. I have some questions for people knowledgeable in "prompt engineering": 1. What's the style name for dilbert-like comic strips? Comic? Line art? 2. How do I produce consistent characters throughout the "comic box" and episodes? 3. How do I hint the generation of the comic? E.g. I draw a stick figure of someone sitting, and it generates my character with that pose. 4…

1. You probably won't hit 100% parity just by prompt engineering especially if you want to do your points 3-4. You would need to train a style LoRa.

2. You can use one of the many ip-adapter models but the best result would probably be a combination of ip-adapter + subject LoRa.

3. That would be a controlnet model probably sketch best results would be achieved (for poses) using open or dw pose models.

4. You would do that with inpainting or stable drag.

https://stable-diffusion-art.com is a good starting point.

Re: Show HN: Creating custom coloring pages from photos. Great for parents/teachers

#30

Post by sverhagen »

iJohnDoe wrote: post #17
afro88 wrote: post #9

Earlier quoted context omitted.

First thing I wanted to do was upload a family photo for my son. But of course, I don't want my family photo used for anything...

Agreed. The site should automatically delete the uploaded photos after a set amount of minutes or seconds. No reason to store them.

If you don't want a site to (possibly) store your photos, not uploading them in the first place may be your only _real_ option...
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