NodeJS – Posterize() is an inbuilt function that is used to apply posterize to images upto the level 'n'. The n will be the input parameter.Syntaxposterize(n, cb)Definition of posterize() paramtersn – It will take input to adjust the posterize level. Minimum value possible is 2.cb – This is an optional parameter that can be invoked after the compilation is complete.Input ImageUsing Node JIMP – POSTERIZE()Before proceeding to use posterize() functions, please check that the following statements are already executed for setting up the environment.npm init -y // Initialising the Node environmentnpm install jimp --save // Installing the jimp dependencyCreate a ... Read More

NodeJS – Opacity() is an inbuilt function that is used to change the opacity of the images. This function multiplies the opacity of each pixel by a factor between 0 and 1 to produce the output image.Syntaxopacity(f, cb)Definition of opacity() paramtersf – It takes a value between 0 to 1 as an input which will the paramtere to make the image opaque. Input 1 will make the image completely transparent.cb – This is also an optional parameter that can be invoked after the compilation is complete.Input ImageUsing Node JIMP – OPACITY()Before proceeding to use opacity() functions, please check that the following statements ... Read More

NodeJS – Invert() is an inbuilt function that is used to invert the image colors.Syntaxinvert(cb)sepia() paramtersb – This is an optional parameter that can be invoked after the compilation is complete.Input ImageUsing Node JIMP – INVERT()Before proceeding to use invert() functions, please check that the following statements are already executed for setting up the environment.npm init -y // Initialising the Node environmentnpm install jimp --save // Installing the jimp dependencyCreate an invert.js file and copy-paste the following code snippet in it.Use node invert.js to run the code.Note − The method name should match with the JS file name. Only then ... Read More

The composite() method overlays an image over another Jimp image at the given x, y coordinates. The image will be placed at the given position of coordinates from where we canSyntaxcomposite( src, x, y, [{ mode, opacitySource, opacityDest }] );Definition of composite() paramterssrc – The src defines the source location of the file where this image is located. It can be a local location or a remote location.x, y – Coordinates that signify where to put the file.mode – You can define a mode here for the image. For example, Jimp.BLEND_SOURCE_OVER – This mode will try to blend the new ... Read More

NodeJS – Grayscale() is an inbuilt function that is used to desaturate an image color into gray depending upon the amount between 0 to 100. The grayscale is basically the conversion of an image into gray from their original colors.Syntaximage.color([    {apply: 'greyscale', params: [value], cb } ]);Definition of greyscale() paramtersvalue – It takes the input for the parameter value to apply the greyscale. The range will be from 0 to 100.cb – This is an optional parameter that can be invoked after the compilation is complete.Input ImageUsing Node JIMP – GREYSCALE()Before proceeding to use greyscale() functions, please check that ... Read More

NodeJS – Flip() is an inbuilt function that is used to flip the images. The images can be flipped either vertically or hoizontally as defined in the function. By default, the images are flipped horizontally.Syntaxflip(h, v, cb)Definition of flip() paramtersh – It takes a boolean value as an input. Image will be flipped horizontally if this is TRUE.v – It takes a boolean value as an input. Image will be flipped vertically if this is TRUE.cb – This is also an optional parameter that can be invoked after the compilation is complete.Input ImageUsing Node JIMP – FLIP()Before proceeding to use ... Read More

NodeJS – Crop() is an inbuilt function that is used to crop the images. We can use crop to select/crop an image within specified coordinates and dimnesions.Syntaxcrop( x, y, w, h, cb )Definition of crop() paramtersx – It will hold the value of x co-ordinate of cropping. (Required)y – It will hold the value of y co-ordinate of cropping. (Required)w – This parameter is used to store the width of the cropping image. (Required)h – This parameter is used to store the height of the cropping image. (Required)cb – This is an optional parameter that can be invoked after the ... Read More

NodeJS – Contrast() is an inbuilt function that is used to adjust the contrast of images. It will increase or decrease the contrast based upon the input value that ranges from -1 to +1.Syntaxcontrast(n, cb)Definition of contrast() paramtersn – It will take n as an input for adjusting the contrast of the image, Possible values of n is between -1 and +1.cb – This is an optional parameter that can be invoked after the compilation is complete.Input ImageUsing Node JIMP – CONTRAST()Before proceeding to use contrast() functions, please check that the following statements are already executed for setting up the environment.npm init ... Read More

NodeJS – spin modifier is an inbuilt function that is used to spin the hue of an image to a given amount from -360° to 360°. We can spin the color from 0 to 360, but it will not perform any function, as it sets the hue back to what it was before.Syntaximage.color([    {apply: 'spin', params: [value] } ]);color() paramtersvalue – It will store the amount of hue to be applied while spinning. Its possible values are from -360 to 360.Input ImageUsing Node JIMP – COLOR – SPINBefore proceeding to use color() – spin functions, please check that the ... Read More

NodeJS – Blur() is an inbuilt function that is used to blur images. The effect produced by JIMP blur() will be similar to that of the Gaussian blur. It blurs based on the pixels input.Syntaxblur(r, cb)Definition of blur() paramtersr – It takes the input for blur and blurs based upon the pixels. If r is 2, it will blur 2 pixels at a time.cb – This is an optional parameter that can be invoked after the compilation is complete.Input ImageUsing Node JIMP – BLUR()Before proceeding to use blur() functions, please check that the following statements arealready executed for setting up the ... Read More