I am looking to make a photoshop action (maybe this isn't possible, any other application recommendations would be helpful as well). I want to take a collection of photos and make them a certain aspect ration, ex: 4:3.
So I have an image that is 150px wide by 200px high. What I would like to happen is the image's canvas is made to be 267px wide, with the new area filled with a certain color.
So there are two possibilities I can think of:
1) Photoshop actions could do this, but I would have to pull current height, multiply by 1.333333 and then put that value in the width box of the canvas resize. Is it possible to have calculated values in Photoshop actions?
2) Some other application has this feature built in.
Any help is greatly appreciated.
Wow, I see now (after writing the answer) that this was asked a long time ago. . . oh well. This script does the trick.
This Photoshop script will resize any image's canvas so that it has a 4:5 aspect ratio. You can change the aspect ratio applied by changing arWidth and arHeight. The fill color will be set to the current background color. You could create an action to open a file, apply this script, then close the file to do a batch process.
Shutdown Photoshop.
Copy this javascript into a new file named "Resize Canvas.jsx" in Photoshop's Presets\Scripts folder.
Start Photoshop and in the File - Scripts menu it should appear.
#target photoshop
main ();
function main ()
{
if (app.documents.length < 1)
{
alert ("No document open to resize.");
return;
}
// These can be changed to create images with different aspect ratios.
var arHeight = 4;
var arWidth = 5;
// Apply the resize to Photoshop's active (selected) document.
var doc = app.activeDocument;
// Get the image size in pixels.
var pixelWidth = new UnitValue (doc.width, doc.width.type);
var pixelHeight = new UnitValue (doc.height, doc.height.type);
pixelWidth.convert ('px');
pixelHeight.convert ('px');
// Determine the target aspect ratio and the current aspect ratio of the image.
var targetAr = arWidth / arHeight;
var sourceAr = pixelWidth / pixelHeight;
// Start by setting the current dimensions.
var resizedWidth = pixelWidth;
var resizedHeight = pixelHeight;
// The source image aspect ratio determines which dimension, if any, needs to be changed.
if (sourceAr < targetAr)
resizedWidth = (arWidth * pixelHeight) / arHeight;
else
resizedHeight = (arHeight * pixelWidth) / arWidth;
// Apply the change to the image.
doc.resizeCanvas (resizedWidth, resizedHeight, AnchorPosition.MIDDLECENTER);
}
Mind that the accepted answer from #user268911 may not work for you if the source image has different pixels/inch than 72. Because the UnitValue.convert function works correctly only with 72 px/inch. To be sure the conversion is correct for ever pixel/inch value, set baseUnit property as follows:
...
var pixelWidth = new UnitValue (doc.width, doc.width.type);
pixelWidth.baseUnit = UnitValue (doc.width.baseUnit, "in");
var pixelHeight = new UnitValue (doc.height, doc.height.type);
pixelHeight.baseUnit = UnitValue (doc.height.baseUnit, "in");
...
For more details about the conversion see "Converting pixel and percentage values" section of the Adobe JavaScript Tools Guide.
What languages do you know? ImageMagick has command line tools that can do this, but you'd need to know a scripting language to get the values and calculate the new ones.
For .NET, my company's product, DotImage Photo, is free and can do this (need to know C# or VB.NET)
Related
Looking for some help in figuring out how to write a script to crop images in Indesign. The images are of two sides of an object, so usually I drag the image in from the folder, copy it and crop both images vertically so I end up with separate objects for the left-hand(front) and right-hand(back) sides of whatever I'm playing with.
I had a search of forums but most of the scripts I found were aimed at a simple resize rather than basically cutting an image in half vertically while leaving the size unchanged - can anyone help me get started on this?
Thanks!
Try this:
var sel = app.selection[0];
app.copy();
var gb = sel.geometricBounds;
gb[3] -= (gb[3]-gb[1])/2;
sel.geometricBounds = gb;
app.pasteInPlace();
var sel = app.selection[0];
var gb = sel.geometricBounds;
gb[1] += (gb[3]-gb[1])/2;
sel.geometricBounds = gb;
It 'crops' selected image (left-hand half), copy/pastes (inplace) the image again and crops its again (right-hand half)
I'm trying to find out if there is a faster way to complete repetitve actions in Indesign - every time I add a new image, I need to resize it to either 5.25% or 3.5%, which atm means I am clicking through Transform, etc., hundreds of times an hour. I've looked into editing the shortcuts but there doesn't seem to be an option for custom percentages.
Surely there must be a more efficient way to do this?
Thanks in advance!
Here is the script to scale any selected image to 5.25%:
var scale = 5.25;
var img = (app.selection.length > 0) ? app.selection[0] : exit();
try { img = img.graphics[0] } catch(e) {};
img.horizontalScale = img.verticalScale = scale;
img.parent.fit(FitOptions.FRAME_TO_CONTENT);
You can assign any shortcuts to any scripts via
I hope you can make the same way the second script to scale image to 3%.
I want to crop an image with Google App Script if an image outside the page frame, but as far as I checked in Google App Script documentation and I could not find a way to crop the image.
pageElements.asImage().replace (imgBlob, true); it is not allowed to pass cropping dimensions as parameters in .replace() to crop a image.
i know this can be achieved using a custom API , passing the image blob and crop area that will call cropping method on another server.
But how it will be possible to work with Google App Script, looking for expert advice.
How about this answer?
Issue:
I think that in the current stage, replace(blobSource, crop) has the limitation. The official document says as follows.
crop Boolean: If true, crops the image to fit the existing image's size. Otherwise, the image is scaled and centered.
I confirmed that when the image is cropped using replace(blobSource, crop), the center of image is left. It seems that this is the current specification. And although there is the "cropProperties" of "UpdateImagePropertiesRequest" in Slides API, unfortunately, in the current stage, this cannot be still used. This has already been reported. Ref
Sample script:
If you use replace(blobSource, crop) under the current specification, how about the following sample script? As the sample situation, 2 images of "image1" and "image2" are prepared in the 1st slide, and "image1" is cropped using "image2".
The flow of this script is as follows.
Flow:
Retrieve 2 images from a slide on Google Slides.
Crop "image1" using "image2". By this, "image2" is replaced with "image1".
Move the cropped image to "image1".
Remove the original "image1".
Script:
function myFunction() {
// 1. Retrieve 2 images from a slide on Google Slides.
var slide = SlidesApp.getActivePresentation().getSlides()[0];
var images = slide.getImages();
var image1 = images[0]; // Red image.
var image2 = images[1]; // Blue image.
// 2. Crop "image1" using "image2". By this, "image2" is replaced with "image1".
var replacedImage = image2.replace(image1.getBlob(), true);
// 3. Move the cropped image to "image1".
replacedImage.setTop(image1.getTop()).setLeft(image1.getLeft());
// 4. Remove the original "image1".
image1.remove();
}
Result:
When the script is run, "image1" is cropped. But it is found that in the current stage, the center of "image1" is left by the crop.
Note:
Slides API and Slides Service are growing now. So I think that this situation might be changed by the future update. But if you want this soon, how about requesting this to the issue tracker as the future request? Ref
References:
replace(blobSource, crop)
CropProperties
Added:
At an additional sample script for using replace(blobSource, crop), I would like to propose the method for using the self image. In this sample script, when the image is sticked out, the image of out of page is removed by cropping. The basic method is the same with above sample script.
Sample script:
function myFunction() {
var s = SlidesApp.getActivePresentation();
var slide = s.getSlides()[0];
var images = slide.getImages();
var image = images[0];
var pageWidth = s.getPageWidth();
var imagePosition = image.getLeft();
var imageWidth = image.getWidth();
var check = imagePosition + imageWidth - pageWidth;
if (check > 0 && check < imageWidth) {
image
.duplicate()
.setWidth(pageWidth - imagePosition)
.asImage()
.replace(image.getBlob(), true);
image.remove();
}
}
Result:
Note:
In this sample script, as a simple sample, I prepared only the right side of the horizontal direction. So when you want to remove the vertical direction, please modify the script for your actual situation.
I am desperately searching for a good cropping tool. There are a bunch out there, for example:
Croppic
Cropit
Jcrop
The most important thing that I am trying to find is a cropping tool, that crops images without making the cropped image low in resolution. You can hack this by using the canvas tag by resizing the image. This way the image itself stays native, only the representation is smaller.
DarkroomJS was also something near the solution, but, unfortunately, the downloaded demo did not work. I'll try to figure out whats wrong. Does someone know some great alternatives, or how to get the cropped images in...let's say "native" resolution?
Thanks in advance!
You are relying on the cropping tool to provide an interface for the users. the problem is that the image returned is sized to the interface and not the original image. Rather than me sifting through the various API's to see if they provide some way of controlling this behaviour (I assume at least some of them would) and because it is such a simple procedure I will show how to crop the image manually.
To use JCrop as an example
Jcrop provides various events for cropstart, cropmove, cropend... You can add a listener to listen to these events and keep a copy of the current cropping interface state
var currentCrop;
jQuery('#target').on('cropstart cropmove cropend',function(e,s,crop){
currentCrop = crop;
}
I don't know where you have set the interface size and I am assuming the events return the crop details at the interface scale
var interfaceSize = { //you will have to work this out
w : ?,
h : ?.
}
Your original image
var myImage = new Image(); // Assume you know how to load
So when the crop button is clicked you can create the new image by scaling the crop details back to the original image size, creating a canvas at the cropped size, drawing the image so that the cropped area is corectly positioned and returning the canvas as is or as a new image.
// image = image to crop
// crop = the current cropping region
// interfaceSize = the size of the full image in the interface
// returns a new cropped image at full res
function myCrop(image,crop,interfaceSize){
var scaleX = image.width / interfaceSize.w; // get x scale
var scaleY = image.height / interfaceSize.h; // get y scale
// get full res crop region. rounding to pixels
var x = Math.round(crop.x * scaleX);
var y = Math.round(crop.y * scaleY);
var w = Math.round(crop.w * scaleX);
var h = Math.round(crop.h * scaleY);
// Assume crop will never pad
// create an drawable image
var croppedImage = document.createElement("canvas");
croppedImage.width = w;
croppedImage.height = h;
var ctx = croppedImage.getContext("2d");
// draw the image offset so the it is correctly cropped
ctx.drawImage(image,-x,-y);
return croppedImage
}
You then only need to call this function when the crop button is clicked
var croppedImage;
myButtonElement.onclick = function(){
if(currentCrop !== undefined){ // ensure that there is a selected crop
croppedImage = myCrop(myImage,currentCrop,interfaceSize);
}
}
You can convert the image to a dataURL for download, and upload via
imageData = croppedImage.toDataURL(mimeType,quality) // quality is optional and only for "image/jpeg" images
I'm using open source library for PDF documents from mozilla(pdf.JS).
When i'm trying to open pdf documents with bad quality, viewer displays it with VERY BAD quality.
But if I open it in reader, or in browser (drag/drop into new window), whis document displays well
Is it possible to change?
Here is this library on github mozilla pdf.js
You just have to change the scaling of your pdf i.e. when rendering a page:
pdfDoc.getPage(num).then(function(page) {
var viewport = page.getViewport(scale);
canvas.height = viewport.height;
canvas.width = viewport.width;
...
It is the scale value you have to change. Then, the resulting rendered image will fit into the canvas given its dimensions e.g. in CSS. What this means is that you produce a bigger image, fit it into the container you had before and so you effectively improve the resolution.
There is renderPage function in web/viewer.js and print resolution is hard-coded in there as 150 DPI.
function renderPage(activeServiceOnEntry, pdfDocument, pageNumber, size) {
var scratchCanvas = activeService.scratchCanvas;
var PRINT_RESOLUTION = 150;
var PRINT_UNITS = PRINT_RESOLUTION / 72.0;
To change print resolution to 300 DPI, simply change the line below.
var PRINT_RESOLUTION = 300;
See How to increase print quality of PDF file with PDF.js viewer for more details.
Maybe it's an issue related with pixel ratio, it used to happen to me when device pixel ratio is bigger than 1 (for example iPhone, iPad, etc.. you can read this question for a better explanation.
Just try that file on PDF.js Viewer. If it works like expected, you must check how PDF.js works with pixel ratio > 1 here. What library basically does is:
canvas.width = viewport.width * window.devicePixelRatio;
canvas.styles.width = viewport.width + 'px'; // Note: The px unit is required here
But you must check how PDF.js works for better perfomance
I ran into the same issue and I used the intent option of renderContent to fix that.
const renderContext = {
intent: 'print',
// ....
}
var renderTask = page.render(renderContext);
As per docs renderContext accepts intent which supports three values - display, print or any. The default is display. When I used print instead the render quality was extremely good, at par with any desktop app.