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This below post started as a question, then I gave it one last try, now it is a rant...
I am looking for a Linux app for examining images (BMP). I feel that my requirements are modest, but no application I have tried meets the following. I need to visually compare minuscule differences in sequence of images.
* Zoom in as elephant, I need pixels as big as peas
* Zoom in without filtering, I must see the original pixels
* Maintain the zoom as I flick through the images (am I only one in 8 billion who needs this?)
I have tried these: eog, nomacs, pinta, feh, mirage, ristretto.
Most of them zoom out always. Nomacs, starts with a promise, but zooms out to 100% randomly. Mirage just crashes. Many of them filter the large image.
Suggestions welcome. Thanks.
After several days of frustration, I just now tried qview. That one works. Elephant!
"If we don't change direction, we'll end up where we're going"
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Could you just zoom part of your window and then look at the images in that area?
If that will work, you go to
Settings...Accessibility...
click the Zoom item to turn it on and then set the area where zoom will be in effect.
See this snapshot[^].
Hope this helps.
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Thanks but... this one also filters, and the "Full screen" zoom was quite hard to escape back from. I need like 20x zoom
"If we don't change direction, we'll end up where we're going"
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megaadam wrote: am I only one in 8 billion who needs this?
To be fair far, far fewer than that will do anything with images except just look at them as some media site presents it. And probably of those won't be looked at at all.
Then of that vast subset only a much smaller subset are those that do create/edit images. And those are going to be looking at the macro scale.
megaadam wrote: visually compare minuscule differences in sequence of images...Maintain the zoom as I flick through the images
I have never seen a request like that before.
Curious as to the use case.
Matter of fact when one says "minuscule" I wonder what you do with different color graduations? Say just one bit difference in the blue of one pixel? Seems unlikely that you could visually see that.
Myself I would expect programmatically it to be easier. I would probably write code to read the image, perhaps provide a bounding region, then compare the pixels via the bytes.
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I agree. I compare pixels instead of "looking" at them.
(I have an app that "corrects" pictures by rejecting any pixel that doesn't match a given palette, and "fills" the hole with the last valid pixel (on that "row"). Effectively "erases" things you don't account for).
"Before entering on an understanding, I have meditated for a long time, and have foreseen what might happen. It is not genius which reveals to me suddenly, secretly, what I have to say or to do in a circumstance unexpected by other people; it is reflection, it is meditation." - Napoleon I
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jschell wrote: far fewer than that
Far fewer than one in 8 billion? You make me feel lonely. With 8 billion humans on Earth, where do you find all the other image viewers? Or am I far fewer than one? Well, that would explain it.
The use-case is OCR, un-italicisizing italic non-latin script, to improve the OCR-output. Have I done it programmatically? Yes, I have. The subjective assessment of the images is just a complement to that.
"If we don't change direction, we'll end up where we're going"
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We have almost exactly that workflow in one of our products. We use it to examine camera images during a calibration process.
You wouldn't believe the gyrations I went through in our UI trying to display simple pixel-accurate bitmaps in WPF. I finally gave up and used an embedded WinForms control.
Software Zen: delete this;
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Looks like you've found a solution. I'm going to have a look at qview as well, it seems nice.
I think irfanview might also be able to do what you want. It has a compare images function which can zoom in and lock the zoom level.
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She says the satellite bug is crazy. (7)
Software rusts. Simon Stephenson, ca 1994. So does this signature. me, 2012
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"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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Not to sure about the last three letters being a bug ?
In a closed society where everybody's guilty, the only crime is getting caught. In a world of thieves, the only final sin is stupidity. - Hunter S Thompson - RIP
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Bard bug
In a closed society where everybody's guilty, the only crime is getting caught. In a world of thieves, the only final sin is stupidity. - Hunter S Thompson - RIP
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"She says ..." covers it I think. (Trying really hard not to hint here, you understand.)
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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OK, I'll take it...
She says (sounds like)
the satellite LUNA
bug TIC(k)
is crazy.
LUNATIC
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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YAUT! I was nearly going to use a name instead of "she", and add a couple of commas, after the name and bug. 
Software rusts. Simon Stephenson, ca 1994. So does this signature. me, 2012
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I thought it was "erratic"
Erra being a Portuguese weather satellite.
// TODO: Insert something here Top ten reasons why I'm lazy
1.
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Quote: When asked about the pushback from developers against working out how to get users spending early in the development process, Riccitiello said: "It's a very small portion of the gaming industry that works that way, and some of these people are my favourite people in the world to fight with -- they're the most beautiful and pure, brilliant people. They're also some of the biggest f***ing idiots.
Now, remind me, who's the "f***ing idiot" again?
Yet another CEO treating customers like they're ATM machines.
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Every CEO should know about Gerald Ratner.
“That which can be asserted without evidence, can be dismissed without evidence.”
― Christopher Hitchens
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GuyThiebaut wrote: That which can be asserted without evidence, can be dismissed without evidence.
I'd like to see your evidence for this.
*hides*
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
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 He was the founder of an extremely successful jewellery chain, in the 1980s, which would sell cheap jewellery.
Pretty much every high street had a branch.
However, he made the mistake of saying twice, once in a conference and once on a BBC programme, that the jewellery was "total cr#p".
The share price tanked overnight and the Ratners stores had to close as the insulted customers stopped buying from them.
“That which can be asserted without evidence, can be dismissed without evidence.”
― Christopher Hitchens
modified 10-Oct-23 2:57am.
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Yeah, I looked him up.
Say what you want about the man, he was refreshingly honest. 
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
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Dave Kreskowiak wrote: Now, remind me, who's the "f***ing idiot" again?
He may be a f***ing a**hole, but with a net worth of over $100 million he's certainly not a f***ing idiot.
Or at the very least, he's doing something right.
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Sander Rossel wrote: he's doing something right.
For himself.
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