I'm in the process of making a system so our customers can upload images to a database for digital signage. The system is working as intended except for one part, which is the preview of the image that was most recently uploaded so they can make sure it's the correct image they wanted. It is getting clipped between 30-40% of the image height. If i upload something around 1000 pixels it will show around 400 pixels and if the image is shorter it will still show the same % of the image. I've looked through all my CSS and I can't figure out why it's doing this. When i inspect the element on the page there are no height attributes set to it, and if I add them it just adds to the white space where the image should be. My code is way too long to post, but basically I have it stored in the database as a blob and then it pulls the lastid out and displays it, but it's getting clipped. Any help would be greatly appreciated.
You have most likely tried to upload an image larger than BLOB (65535 bytes). Here is the MySQL Documentation
The best practice here would be to store your images in a folder and store the path to that image in your database.
it has nothing to do with mysql, Mysql clipping your data wouldnt make the image smaller (dimension wise) - it would destroy a part of the image.
Your problem is in the CSS / html - use Google chrome and right click on the image to see what CSS is applied. It will be in there or a parent element which the image can not be larger than (assuming your something which sets max-width:100% )
You may have an overflow:hidden to make it appear clipped. or just another element overlapping it but with a higher z-index
Related
I am trying to build a deals page which are pulled from amazon.in.I basically go to a deal and copy the image and upload to my server.
But due to different size of the images on amazon.in when I shrink it by 200*200 size for the deal thumbnail, some of the images are getting distorted.
In the below image you can see that the Amazon Basics cable is properly scaled, where as the iphone 7 image is distorted due to the nature of images at amazon.in.
What is the general recommendation for these problems? How do we solve this issue so that I get uniform images for my deals?
If the image does not have an aspect ratio of 1:1 (which is the ratio for your thumbnails) it will get distorted because there's more length in one dimension than the other and if try to match them, one of them will have to be squeezed. That's where the distortion comes from.
The only thing that will work is to give the images a new aspect ratio that matches your template
This can be done with CSS like #SaidbakR mentioned in the comments
Fix the width and place the image in a div with oveflow:none and fixed height to hide the extra height.
This will work beautifully but some images will just not work. They will just be cutoff in the wrong places.
The only other thing you can do is to manually edit the photos in Photoshop or something similar. This can work on all images, but manually editing each and every photo that doesn't fit is a pain in the neck.
nevertheless, here's what you end up with.
Before: Original Image in full dimensions
After: Image edited in a program like Photoshop to the desired size of 200x200 with no distortion
So? My Suggested fix is to adjust your approach/template or find another source for your images.
I currently have a page with about 20 or images with source data pulled from a database.
I display them at width of 100px and I have a hover function that appends an element with the full size image with a width of 250px.
I decided to use the full size version for the original image and just scale it down to 100px instead of using a thumbnail version. My thinking on this was that on this page it is very likely that the user will hover over most of the images so the page would end up having to load the full size version for most of the images anyway so why make them download the thumbnail AND full size version for each element. Also scaling from 250px to 100px didn't seem to display much if any distortion in the smaller element.
Now I am running my page through Google page speed analyzer and it really does not like me using larger than necessary images for the smaller elements. Of course it is ignoring the fact that those larger images are being used for the dynamically created popups.
In order to make my page play nice with Google's page speed tester I am giving in and using thumbnails for the smaller elements but I also want to prefetch the larger image to avoid an annoying delay when the user hovers over the element. This means I am essentially loading 2 versions of the same image just to make Google speed test not yell at me.
This seems ridiculous to me so I wanted to ask if this is really the best way to do this or is there another way to make my page play nice with Google speed test.
Thanks,
Adam
If you know what you're doing, there's no need to be a slave to the PageSpeed score.
Loading two copies of the images could make actual page speed slower. However, it depends on what you are trying to optimize for. Loading thumbnails first and then large versions could be better if you want time to full render to be fast (so the users can see the page) and then load the big images in the background to add interactivity later.
Or is it better to have fast time to interactivity, and time to full render doesn't matter that much. Then maybe having one copy of each image is better.
When I have an <img> that is smaller than the original image, will the file automatically be resized? Or will the user have to load the entire image?
For example, I have giant wallpaper files, but I only show thumbnails that are 100px by 100px. Am I doing something inefficiently by just setting the <img> width and height to 100px?
Yes. The browser has to download the entire image file and then scale it.
Yes, whole image will load and then scaling will be there.
Why don't you search before asking a simple question.
If you google it you can easily get this answer.
I would suggest next time please do some Google and practice it on any editor before you ask any questions that will give you hands on experience.
Answer :- Whole image will be loaded and whole image will be automatically re-sized, Yes it is not good practice to use big amount of size to small scale of image height and width
When I search in Google, instead of their main page, when I look at their logo, and copy the image path, it shows that:
http://www.google.com/images/nav_logo91.png
Well, it is not a logo only, it have many icon as well. Is there any reason why Google use this way to do so? any results or just for showcasing their technique skill? Also, how can only show a part of a image only? Thanks.
It's a sprite. Doing this can reduce file size and load time.
You can splice the image using JavaScript or using CSS (CSS being the more popular choice). You can make the element with a div tag, then set the background-image property to the URL you've specified. Then use the background-position property to align it appropriately. Lastly, set the expected width and height of the div.
Its called CSS sprites. A lot of websites use this technique, where in all (decorative) images on the site are contained in a single image.
This single image tends to be smaller in size than the sum of all the individual images (each image holds its own color table). Also, fetching a single image from the server means lesser HTTP server requests.
The large image is then placed as backgrounds in div's and manipulated using background-position and other CSS properties to ensure only the portion of the sprite shows that is required.
It's like animuson has already explained, they're called CSS sprites, to expand a little they are used to prevent excess HTTP Requests.
By having just one image to load, it is cached and then the website can use that one image for multiple backgrounds but only make certain areas viewable by using background-position.
A good explanation is here: http://css-tricks.com/158-css-sprites/
Basically what I am asking is, is there a way to have say a 1000x1000 pixel image and simply have some sort of code, whether html, css, or anything else to only download a resized verison of 100x100 pixels. Is there any way to do this? I would like to know before resizing each of my pictures and uploading them and linking those photos to the original larger version. Thanks.
You can't do it with HTML/CSS but it is possible with a server side language like PHP. Here's a script that will allow you to resize images.
The catch is that resizing images can be a server intensive process. You should try to make sure that once you've created a resized version of an image, it's cached on the server for subsequent requests.
Along those lines, the flow should be:
Image request comes in.
Does the resized thumbnail exist in the server's cache? If yes, serve the thumbnail.
If no, create the thumbnail, place it in the server cache and serve it.
Note: James brought up a good point in the comments. If the images you're resizing are going to change (updated/edited), you'll need to keep track of their large image's last modified date when you create the thumbnail (as part of the filename or in a database).
That way, when you check the cache, you'll be able to tell if the thumbnail needs to be regenerated.
You can create an account on imageshack.us (create the account to make sure your images don't get deleted) and then upload the image in different sizes and link to whatever size you want. (You don't have to do the resizing yourself, you can do it on imageshack when you upload) That way you get the image in whatever size you want and without putting any load at all on your server.
That's what I do and it works wonderfully
Example:
http://img52.imageshack.us/img52/1825/lakesunset.jpg
http://img12.imageshack.us/img12/6420/lakesunsetf.jpg
Both came directly from imageshack. Just uploaded the image twice and resized one on imageshack.
Then to display the thumbnail and link it to the larger one just use this code:
<img src="DIRECT SMALL IMAGE URL"/>
Example:
http://img12.imageshack.us/img12/6420/lakesunsetf.jpg
Sorry, I've never done any server side programming since I'm not a professional and I'm poor, so I can't help you if that's what you're looking for.