Grayscale PNG via NodeJs Cloud API
Grayscale PNG using native NodeJs Cloud APIs without needing any image editor or 3rd-party libraries.
Get StartedHow to Grayscale PNG Using NodeJs Cloud API
Aspose.Imaging.Cloud for Node.js API which is a feature-rich, powerful and easy to use image manipulation and conversion Cloud API for Node.js platform. You can install its latest version from npm
npm console command
npm i @asposecloud/aspose-imaging-cloud
Steps to Grayscale PNG via NodeJs Cloud API
Developers can easily load & grayscale PNG files in just a few lines of code.
- Load PNG file as stream
- Create & set the instance of CreateGrayscaledImageRequest
- Call the CreateGrayscaledImage method
- Get grayscaled image from response stream
System Requirements
Aspose.Imaging Cloud for NodeJs is supported on all major operating systems. Just make sure that you have the following prerequisites.
- Node.js 6.x and higher.
Grayscale PNG - Cloud
| import * as fs from "fs"; | |
| import * as path from "path"; | |
| import {ImagingBase} from "./imaging-base"; | |
| import { | |
| CreateGrayscaledImageRequest, GrayscaleImageRequest, | |
| ImagingApi, | |
| } from "@asposecloud/aspose-imaging-cloud"; | |
| const ImageFileName = "example_image.png"; | |
| const ImagesFolder = "ExampleImages"; | |
| const CloudFolder = "CloudImages"; | |
| const OutputFolder = "Output"; | |
| // Get ClientId and ClientSecret from https://dashboard.aspose.cloud/ | |
| // or use on-premise version (https://docs.aspose.cloud/imaging/getting-started/how-to-run-docker-container/) | |
| const api = new ImagingApi(clientSecret, clientId, "https://api.aspose.cloud"); | |
| /** | |
| * Grayscale an image from cloud storage. | |
| */ | |
| public async GrayscaleImageFromStorage() { | |
| const localInputImage = fs.readFileSync(path.join(ImagesFolder, ImageFileName)); | |
| const uploadFileRequest = new UploadFileRequest({path: path.join(CloudFolder, imageName), file: image}); | |
| const result = await this.api.uploadFile(uploadFileRequest); | |
| if (result.errors.length > 0) | |
| console.log(`Uploading errors count: ${result.errors.length}` | |
| const folder = this.CloudFolder; // Input file is saved at the desired folder in the storage | |
| const storage = undefined; // We are using default Cloud Storage | |
| const request = new GrayscaleImageRequest({ | |
| name: this.ImageFileName, | |
| folder, | |
| storage, | |
| }); | |
| const updatedImage = await this.api.grayscaleImage(request); | |
| // Save the image file to output folder | |
| const updatedImageName = "updated_" + ImageFileName; | |
| const filePath = path.resolve(path.join(OutputFolder, updatedImageName)); | |
| fs.writeFile(filePath, updatedImage, (err) => { | |
| if (err) { | |
| throw err; | |
| } | |
| }); | |
| } | |
| /** | |
| * Grayscale an image. Image data is passed in a request stream. | |
| */ | |
| public async CreateGrayscaledImageFromRequest() { | |
| const outPath = undefined; // Path to updated file (if this is empty, response contains streamed image) | |
| const storage = undefined; // We are using default Cloud Storage | |
| const inputStream = fs.readFileSync(path.resolve(ImagesFolder, ImageFileName)); | |
| const request = new CreateGrayscaledImageRequest({ | |
| imageData: inputStream, | |
| outPath, | |
| storage, | |
| }); | |
| const updatedImage = await this.api.createGrayscaledImage(request); | |
| // Save the image file to output folder | |
| const updatedImageName = "updated_" + ImageFileName; | |
| const filePath = path.resolve(path.join(OutputFolder, updatedImageName)); | |
| fs.writeFile(filePath, updatedImage, (err) => { | |
| if (err) { | |
| throw err; | |
| } | |
| }); | |
| } |
About Aspose.Imaging Cloud API for NodeJs
Aspose.Imaging Cloud API is an image processing solution to process images (photos) within your cloud or web applications. It offers: cross-platform Image processing, including but not limited to conversions between various image formats (including uniform multi-page or multi-frame image processing), transformations (resize, crop, flip&rotate, grayscale, adjust), advanced image manipulation features (filtering, deskewing), AI features (i.e. object detection and reverse image search). It’s a Cloud API and does not depend on any software for image operations. One can easily add high-performance image conversion features with Cloud APIs within projects. Flexible integrations options including SDKs for various languages (Python, Ruby, .NET, Java, NodeJS, PHP) and the use of the REST API allow to make the integration easy.
Grayscale PNGs via Online App
Grayscale PNG documents by visiting our Live Demos website. The live demo has the following benefits:
PNG What is PNG File Format
PNG, Portable Network Graphics, refers to a type of raster image file format that use loseless compression. This file format was created as a replacement of Graphics Interchange Format (GIF) and has no copyright limitations. However, PNG file format does not support animations. PNG file format supports loseless image compression that makes it popular among its users. With the passage of time, PNG has evolved as one of the mostly used image file format. Almost all Operating Systems have support for opening PNG files. For example, Microsoft Windows viewer has the capability to open PNG files as the OS has by default the support available as part of installation.
Read MoreOther Supported Conversions
Using NodeJs Cloud API, one can easily grayscale different formats including: