seems like theres something hidden in this image that i cant find.enter image description here
There should be a flag in there in the format GMC{}
I've tried photoshop, zsteg, steghide but still no luck
try looking at its exif data maybe you can find something there. There is a tool called exiftool that can be used to look exif data in a png file.
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I have found many answers about converting .svg files to rasterized formats, however I would prefer to keep it as a single svg file. I got excited when I found react-native-svg, but was then disappointed when I saw their image example used a .jpg file.
Is keeping my image as a vector possible? Am I trying to do something unwise?
Thank you for your help.
You need to convert your SVG's to use the react-native-svg library, this is a useful tool to do so: https://react-svgr.com/playground/
This does not rasterise the image, it will remain as a vector just in a format that the library can parse.
I am developing an Android app now, it needs to recognize captcha from website.
I utilize the tess-two to recognize captcha and follow TrainingTesseract3 instructions to train my own traineddata (using jTessBoxEditor to correct characters), but it cannot recognize correctly and even cannot recognize it.
The below TIFF image is that I use to train my Tesseract, I collect many captchas and merge them into a image.
TIFF image
The image that I want to recognize
For example, the expected result of the above image should be k8666, but the actual result is only 66.
Does anyone give me a help? Thanks.
I tried your images using a .NET wrapper for tesseract-ocr Tesseract-ocr .Net Wrapper by Charliesw.
I got some better results like (K8EEE, K8656), i think you have to increase the text font and make it bold and i saved the image in tiff format with 96DPI resolution to get a better results than mine.
Ebay now requires images to be 500x500.
I want to try to use ImageResizer to resize an image to be a minimum of 500x500 by adding white background padding
The following command achieves this quite easily.
product.jpg?width=500&height=500&scale=canvas
This works great, except when the original image is 800x800 and it will be downsized and lose quality.
What I really want to do is combine scale=canvas with scale=upscaleonly but that doesn't seem to be possible? Am I missing something or will I have to write code myself using the API.
PS. I realize ebay may detect whitespace and still reject the image, but I'm trying that for now - I have a lot of perfectly good 450x450 images that fall short and I don't want to upscale them.
At present, there's no 'upscalecanvasonly' mode.
So far we haven't had anyone else request this, but feel free to add it to our UserVoice site as a feature idea.
You could also implement this with a small IPlugin that subclassed BuilderExtension and implemented LayoutImage to support an additional command. It shouldn't be very difficult.
I haven't used ImageResizer before, but I've worked with images, so I took a quick peek at the basic commands for ImageResizer.
If I understand your problem correctly, when you downsize a 800x800 image it looses quality. This does point to a severe problem because the original image has more data than what is needed to display a high quality 500x500 image. Because of this, we must look at the image file format type and the data compression quality/method.
In your example, you are using the JPEG file format. You may want to specify the format in the command, i.e., format=jpg
In using the JPEG format, Imageresizer gives you control over the quality of the compression:
The documentation states:
quality - Jpeg compression: 0-100 100=best, 90=very good balance, 0=ugly
Take a look at the documentation for the exact verbage for setting the quality.
I'm trying to insert some SVG images in a PDF using TCPDF with the method TCPDF::ImageSVG, but when I try this I get a white space.
If I try to enable TCPDF::setRasterizeVectorImages the image shows in the PDF file, but it is rasterized of course and so its quality is not good.
Do you have any idea?
Thank you very much for your help!
Unfortunately, TCPDF's SVG handling is quite limited, and the cause of your issue depends on the SVG you are trying to use. Later versions of TCPDF support more SVG functionality, so if you haven't done so, try using a later version of TCPDF.
If an update doesn't resolve the issue, and you're forced to use raster images, you can improve quality at the cost of file size. You can do this by rasterizing them at a high DPI yourself outside of TCPDF. Once you've done this, take your new high-resolution raster image and add it to your PDF with the Image method like any other raster image. At work we usually rasterize to 300dpi, but your application may call for more or less.
If your image gets added to the PDF far larger on the page than you expected, specify at least one of the dimensions so TCPDF knows how much of the page you're intending the image to use.
My use case is pretty simple. I need to convert the PDFs to images.I tried using apache pdfbox and i am having some trouble in converting pdfs which contains scanned images. when i convert scanned image the image clarity is lost due to compression/scaling. So i was trying to extract the image data from the PDF and then store it. But the problem is i may get PDF files which will contain images and text in which case i would need to fallback to image conversion mode. The problem is how to differentiate between the pages/documents having only image and the ones with composite data. I was thinking i could use ProcSet defenition for this purpose but looks like it is marked as obsolete and non-reliable according to PDF specifications. Other possibility is to check all the objects linked to that page and see if it contains anything other than images. Please let me know if there is an easier way of doing this
Thanks
If your intention is convert pdf to image, It is better to use ImageMagick for that. If you use ImageMagick, there is a lot options to change the quality of the image. And converting pdf to image is pretty simple using ImageMagick.