ImageFilter-upm-etsisi. Version 1

Abstract

This library have several filters to process images in Android directly in Render Script (C99).

As developer than want to use filters, you can call easily via Java build Software pattern the different filters and concatenate these.

This library is part of TFG of Ramón Invarato for UPM University (ETSISI) https://www.etsisi.upm.es/

Import last AAR

You can import last AAR compiled from es-upm-etsisi-imagefilter.aar in finalAAR folder.

In AndroidStudio you need to go to menu in File and select /New/New Module…. In the new Windows you need to choose Import .JAR/.AAR Package option and import AAR file to your project.

It is important check in build.gradle project level if was included this library (if not, you need to include as dependency):

dependencies {
    // ...
    implementation project(":es-upm-etsisi-imagefilter")
}

And in the top of global settings.gradle file, it is necessary to exists:

include ':app', ':es-upm-etsisi-imagefilter'

Compile a new AAR

It is not necessary, only if you need to compile.

Execute the gradle command build.

The new file AAR will build in \build\outputs\aar\.

Mode of use

This library you can use with build Software pattern.

For initialice, you need to pass to constructor the context and the bitmap than you want to filter:

new Filtros(context, bitmap);

You can import a Bitman from a PNG in resources folder (example res\drawable\lenna.png) with:

Bitmap bm = BitmapFactory.decodeResource(getResources(), R.drawable.lenna);

Considering you are use this library from Activity class, you can get the context with this and use the library in this way:

Bitmap nbm = new Filtros(this, bm)
                .prewitt()
                .solarizar()
                .invertir()
                .getBitmapProcessed();

Here I have applied first prewitt filter, secondly solarizar filter and in last instance invertir filter filters. The build method is getBitmapProcessed than return the new bitmap generated (nbn) after apply previous filters.

Current filters

In this library you can use follow filters:

• blancoNegro
• blancoverdadero
• brillo
• canalAlpha
• complemento
• contraste
• correlation
• escalaDeGrises
• escalaDeGrisesMedia
• hsva
• invertir
• mediana
• mooreneighborhood
• negroverdadero
• posterizar
• prewitt
• sepia
• solarizar
• op_union
• op_division
• op_multiplicacion
• op_resta
• op_suma
• pasoBajo
• pasoAlto
• gradiente
• sobel
• roberts
• laplaciana
• freichen

And you can use the follow built-in methods:

• escalaDeGrisesPALNTSC
• escalaDeGrisesHDTV
• escalaDeGrisesHDR
• blancoNegro
• quitarCanalAlpha
• matiz
• saturacion
• intensidad
• azulado
• realceLaplaciana
• suavizadoRoberts