B4A Library RSImageProcessing Library

jcohedman · Dec 10, 2012

XverhelstX said:
Hello everybody,

I'm back again with a new library.
With this library you can do a lot of image processing and it is easy to use:

Properties:

All As

Methods:

applyConfig (config As Double()())

computeConvolution3x3 (src As Bitmap, matrix As ConvolutionMatrix) As Bitmap
This works fluently on my app.
Sharpens my image.
Works slower!
Uses getpixel
src:
matrix:
Return type: @return:

RSImageBlend
Methods:

AddBlend (source As Bitmap, layer As Bitmap) As Bitmap
Blends 2 bitmaps to one and adds addition blend.

AverageBlend (source As Bitmap, layer As Bitmap) As Bitmap
Blends 2 bitmaps to one and adds average blend.

Blend (bottomImage As Bitmap, topImage As Bitmap, left As Float, top As Float) As Bitmap
Blends 2 bitmaps together with help of a canvas. - Blending
Draws them both to a canvas and saves them as a bitmap.

ColorBurnBlend (source As Bitmap, layer As Bitmap) As Bitmap
Blends 2 bitmaps to one and adds substraction blend.

ColorDodgeBlend (source As Bitmap, layer As Bitmap) As Bitmap
Blends 2 bitmaps to one and adds the color dodge blend mode to it.

DarkenBlend (source As Bitmap, layer As Bitmap) As Bitmap
Blends 2 bitmaps to one and adds darken blend.

DifferenceBlend (source As Bitmap, layer As Bitmap) As Bitmap
Blends 2 bitmaps to one and adds substraction blend.

ExclusionBlend (source As Bitmap, layer As Bitmap) As Bitmap
Blends 2 bitmaps to one and adds substraction blend.

GlowBlend (source As Bitmap, layer As Bitmap) As Bitmap
Blends 2 bitmaps to one and adds substraction blend.

HardMixBlend (source As Bitmap, layer As Bitmap) As Bitmap
Blends 2 bitmaps to one and adds substraction blend.

HardlightBlend (source As Bitmap, layer As Bitmap) As Bitmap
Blends 2 bitmaps to one and adds substraction blend.

LightenBlend (source As Bitmap, layer As Bitmap) As Bitmap
Blends 2 bitmaps to one and adds lighten blend.

LinearBurnBlend (source As Bitmap, layer As Bitmap) As Bitmap
Blends 2 bitmaps to one and adds substraction blend.

LinearDodgeBlend (source As Bitmap, layer As Bitmap) As Bitmap
Blends 2 bitmaps to one and adds addition blend.

LinearLightBlend (source As Bitmap, layer As Bitmap) As Bitmap
Blends 2 bitmaps to one and adds substraction blend.

MultiplyBlend (source As Bitmap, layer As Bitmap) As Bitmap
Blends 2 bitmaps to one and adds darken blend.

NegationBlend (source As Bitmap, layer As Bitmap) As Bitmap
Blends 2 bitmaps to one and adds substraction blend.

OverlayBlend (source As Bitmap, layer As Bitmap) As Bitmap
Blends 2 bitmaps to one and adds substraction blend.

PhoenixBlend (source As Bitmap, layer As Bitmap) As Bitmap
Blends 2 bitmaps to one and adds substraction blend.

PinLightBlend (source As Bitmap, layer As Bitmap) As Bitmap
Blends 2 bitmaps to one and adds substraction blend.

ReflectBlend (source As Bitmap, layer As Bitmap) As Bitmap
Blends 2 bitmaps to one and adds substraction blend.

ScreenBlend (source As Bitmap, layer As Bitmap) As Bitmap
Blends 2 bitmaps to one and adds substraction blend.

SoftlightBlend (source As Bitmap, layer As Bitmap) As Bitmap
Blends 2 bitmaps to one and adds substraction blend.

SubstractBlend (source As Bitmap, layer As Bitmap) As Bitmap
Blends 2 bitmaps to one and adds substraction blend.

VividLightBlend (source As Bitmap, layer As Bitmap) As Bitmap
Blends 2 bitmaps to one and adds substraction blend.

RSImageEffects
Methods:

Blur (src As Bitmap, Factor As Int, Offset As Int) As Bitmap
Does a Gaussian Blur to the image. - Filter
It uses the concepts of Convolution Filtering to apply in image processing.

Brightness (src As Bitmap, value As Int) As Bitmap
The concept of brightness is rather simple, increasing/decreasing value of each R, G, B channel together.
+ By increasing: image results brighter.
+ By decreasing: image results darker.

Effects

ColorBoost (src As Bitmap, type As Int, percent As Float) As Bitmap
Color boost technique is basically based on color filtering, which is to increase the
intensity of a single color channel.

Effect

Contrast (src As Bitmap, value As Double) As Bitmap
Contrast is the difference in luminance and/or colour that makes an object (or its representation in an image or display) distinguishable.
In visual perception of the real world, contrast is determined by the difference in the colour and
brightness of the object and other objects within the same field of view.

Effects

Emboss (src As Bitmap) As Bitmap
Embosses your bitmap to make it look sketchy like.

Filter

Engrave (src As Bitmap) As Bitmap
Engraves your bitmap.

Filter

Flip (src As Bitmap) As Bitmap
Flips a bitmap vertically.

Effect

GammaCorrection (src As Bitmap, red As Double, green As Double, blue As Double) As Bitmap
Gamma correction or gamma encoding is one among the common image processing method
Gamma correction, gamma nonlinearity, gamma encoding, or often simply gamma,
is the name of a nonlinear operation used to code and decode luminance or tristimulus values in video or
still image systems.

Effect

GreyScale (src As Bitmap) As Bitmap
Greyscales a bitmap
The intensity is calculated by common formula: 30% of Red + 59% of Green + 11 % of Blue

Effects

Highlight (src As Bitmap) As Bitmap
Highlights a bitmap.

Effects

Invert (src As Bitmap) As Bitmap
Inverts a bitmap.
Every image pixel holds information of four channels: Alpha, Red, Green, Blue.
However, Alpha doesn�t reflect the image color as display. So the value is kept, and take inversion for other three
channels by formula: 0xFF � CurrentValue.

Mirror (src As Bitmap) As Bitmap
Flips a bitmap horizontally.

Effect

Noise (source As Bitmap) As Bitmap
Gives a noise or flea effect to the bitmap

Effect

Paintify (src As Bitmap, bitOffset As Int, Factor As Int, Offset As Int) As Bitmap
Makes a paint like effect on a picture.
128 (or 64/32)
8
1

Effect

Paintify2 (src As Bitmap, bitOffset As Int, Factor As Int, Offset As Int) As Bitmap
Makes a paint like effect on a picture.
128 (or 64/32)
8
1

Effect

Posterize (src As Bitmap, bitOffset As Int) As Bitmap
Decreasing color depth involves converting to standard values.
For example: if I want to offset 32, then each image color channel will apply the range: 0, 31, 63 �

Effects

Reflection (originalImage As Bitmap, ReflectionGap As Int) As Bitmap
Makes a mirror/reflection like
ReflectionGap: gap space between original and reflected

Effect

ReplaceColor (src As Bitmap, fromColor As Int, targetColor As Int) As Bitmap
Replaces pixels from one color to the other.

Effect

Rotate (src As Bitmap, degree As Float) As Bitmap
Rotates a bitmaps

Effects

RoundCorner (src As Bitmap, round As Float) As Bitmap
Create a bitmap with round corners.
Effect

SepiaToning (src As Bitmap, depth As Int, red As Double, green As Double, blue As Double) As Bitmap
Sepia-toning effect is used very commonly in photography.
It is the process of changing the intensity on every pixel color of a gray-scale image, or so-called black-and-white.

Effects

Sharpen (src As Bitmap, weight As Double) As Bitmap
Sharpening effect make uses of Convolution Matrix
The applied matrix is:
[ 0 | -2 | 0 ]
[ -2 | 11 | -2 ]
[ 0 | -2 | 0 ]

Filter
Weight : 3

Sharpen2 (src As Bitmap, weight As Double) As Bitmap
Sharpening effect make uses of Convolution Matrix
The applied matrix is:
[ 0 | -2 | 0 ]
[ -2 | 11 | -2 ]
[ 0 | -2 | 0 ]

Filter
Weight : 3

Sketchify (src As Bitmap, Factor As Int, Offset As Int) As Bitmap
Sketchify a photo.
src:
Factor: 16
Offset: 0
Return type: @return:Effect

Smooth (src As Bitmap, value As Double) As Bitmap
Smoothens a bitmap.
The factor is 13 and offset 1.

Filter

Snow (source As Bitmap) As Bitmap
Adds a snow-like effect to the bitmap.
Opposite of Black Filter
Sets all pixels having R,G,B values to the max (0xFF) when they�re greater than threshold,
then we have the Snow Effect.

Effect

TintColor (src As Bitmap, degree As Int) As Bitmap
Gives a nice tint color to a bitmap.
degree: Use the constants for the degree.

Effect

Watermark (src As Bitmap, watermark As String, x As Float, y As Float, color As Int, alpha As Int, size As Int, underline As Boolean) As Bitmap
Gives your image a watermark, choose the location of the text, etc, etc
Effect

RSImageFilters
Methods:

BlackFilter (source As Bitmap) As Bitmap
Base on randomizing image pixels, another filter is created, named �Black Filter�, or enhance the noise of darkness.
The algorithm is to generate a threshold number (0-255), if all R,G,B values of a pixel are less than the threshold,
then set the pixel to black.

Filter

ColorFilter (src As Bitmap, red As Double, green As Double, blue As Double) As Bitmap
Filter the color on the bitmap, in which to display image by only one channel or
combine the increase on every channel.

Filter

EdgeEnhancement (src As Bitmap, Factor As Int, Offset As Int) As Bitmap
Edge Enhancement

EdgeEnhancement2 (src As Bitmap, Factor As Int, Offset As Int) As Bitmap
Edge Enhancement

EdgeEnhancement3 (src As Bitmap, Factor As Int, Offset As Int) As Bitmap
Edge Enhancement

FindEdge (src As Bitmap, Factor As Int, Offset As Int) As Bitmap
Find Edge

FindEdge2 (src As Bitmap, Factor As Int, Offset As Int) As Bitmap
Find Edge

FindEdge3 (src As Bitmap, Factor As Int, Offset As Int) As Bitmap
Find Edge

GaussianFilter (src As Bitmap, Factor As Int, Offset As Int) As Bitmap
Gaussian filter.

GaussianFilter2 (src As Bitmap, Factor As Int, Offset As Int) As Bitmap
Gaussian filter.

HueFilter (source As Bitmap, level As Int) As Bitmap
Filters the Hue of a bitmap.
By converting RGB to HSV, we can adjust pixel color in different way.

Filter

MeanRemoval (src As Bitmap) As Bitmap
Mean Removal Effect makes uses of Convolution Matrix.
The applied matrix is:
[ -1 | -1 | -1 ]
[ -1 | 9 | -1 ]
[ -1 | -1 | -1 ]

Filter

SaturationFilter (source As Bitmap, level As Int) As Bitmap
Filters the saturation of a bitmap.
By converting RGB to HSV, we can adjust pixel color in different way.

Filter

ShadingFilter (source As Bitmap, shadingColor As Int) As Bitmap
Shading Filter is a technique that use AND operator for the current pixel color and a desired-shading color.

Filter

Wedding (src As Bitmap, Factor As Int, Offset As Int) As Bitmap
Wedding
src:
Factor: 16
Offset: 0
Return type: @return:Filter

RSImageProcessing
Methods:

Initialize
Initializes the RSSImageProcessing Library.
EventName - Events subs prefix.

compress (bitmap As Bitmap, format As String, quality As Int, stream As OutputStream)
Write a compressed version of the bitmap to the specified outputstream.

format The format of the compressed image
quality Hint to the compressor, 0-100. 0 meaning compress for small size, 100 meaning compress for max quality. Some formats, like PNG which is lossless, will ignore the quality setting
stream The outputstream to write the compressed data.

createScaledBitmap (src As Bitmap, dstWidth As Int, dstHeight As Int, filter As Boolean) As Bitmap
Creates a new bitmap, scaled from an existing bitmap.
src The source bitmap.
dstWidth The new bitmap's desired width.
dstHeight The new bitmap's desired height.
filter true if the source should be filtered.
Return type: @return:the bitmap

eraseColor (bitmap As Bitmap, c As Int)
Fills the bitmap's pixels with the specified Color.
bitmap: the source bitmap. (must be mutable!)
c: colours

extractAlpha (bitmap As Bitmap) As Bitmap
Returns a new bitmap that captures the alpha values of the original.
bitmap:

extractBitmap (source As Bitmap, x As Int, y As Int, width As Int, height As Int) As Bitmap
Returns an immutable bitmap from the specified subset of the source bitmap.
The new bitmap may be the same object as source, or a copy may have been made.
It is initialized with the same density as the original bitmap.
source:
x:
y:
width:
height:
Return type: @return:

extractBitmap2 (source As Bitmap, x As Int, y As Int, width As Int, height As Int) As Bitmap
Returns an immutable bitmap from the specified subset of the source bitmap.
The new bitmap may be the same object as source, or a copy may have been made.
It is initialized with the same density as the original bitmap.
source:
x:
y:
width:
height:
Return type: @return:

getDestination (src As Bitmap, destination As Double) As Int
Gets the new destination width or height keeping the aspect ratio of the image.
src: - bitmap
destination: -Source width or height
Return type: @return:

getPixel (bitmap As Bitmap, x As Int, y As Int) As Int
Returns the Color at the specified location.
Throws an exception if x or y are out of bounds (negative or >= to the width or height respectively).
bitmap:
x: The x coordinate (0...width-1) of the pixel to return
y: The y coordinate (0...height-1) of the pixel to return
Return type: @return:The argb Color at the specified coordinate

hasAlpha (bitmap As Bitmap) As Boolean
Returns true if the bitmap's config supports per-pixel alpha, and if the pixels may contain non-opaque alpha values.
For some configs, this is always false (e.g. RGB_565), since they do not support per-pixel alpha.
However, for configs that do, the bitmap may be flagged to be known that all of its pixels are opaque.
In this case hasAlpha() will also return false. If a config such as ARGB_8888 is not so flagged, it will return true by default.
bitmap:
Return type: @return:

isMutable (bitmap As Bitmap) As Boolean
Returns true if the bitmap is marked as mutable (i.e. can be drawn into)
bitmap:
Return type: @return:

isRecycled (bitmap As Bitmap) As Boolean
Returns true if this bitmap has been recycled. If so, then it is an error to try to access its pixels, and the bitmap will not draw.
bitmap:
Return type: @return:true if the bitmap has been recycled

recycle (bitmap As Bitmap)
Free the native object associated with this bitmap, and clear the reference to the pixel data.
This will not free the pixel data synchronously; it simply allows it to be garbage collected if
there are no other references. The bitmap is marked as "dead", meaning it will throw an exception if
getPixels() or setPixels() is called, and will draw nothing. This operation cannot be reversed,
so it should only be called if you are sure there are no further uses for the bitmap.
This is an advanced call, and normally need not be called, since the normal GC process will free
up this memory when there are no more references to this bitmap.
bitmap:

rotate (src As Bitmap, degree As Float) As Bitmap

rotateBitmap (bitmap As Bitmap, degrees As Float) As Bitmap
Rotates the bitmap.
bitmap:
degrees:
Return type: @return:

scaleBitmap (bitmap As Bitmap, sx As Float, sy As Float) As Bitmap
Scales the bitmap.
bitmap:
degrees:
Return type: @return:

setHorizontalScrollBarEnabled (hsv As HorizontalScrollView, enabled As Boolean)

skewBitmap (bitmap As Bitmap, kx As Float, ky As Float) As Bitmap
Skews the bitmap.
bitmap:
kx:
ky:
Return type: @return:

translateBitmap (bitmap As Bitmap, dx As Float, dy As Float) As Bitmap
Translate the bitmap.
bitmap:
degrees:
Return type: @return:

writeBitmapToFile (src As Bitmap, dir As String, fileName As String, quality As Int)
Writes a bitmap to a file

And tons of other features!

Have fun,
Tomas

Error description: Unknown member: colordodgeblend
Occurred on line: 57
btmpBlend = IO.ColorDodgeBlend(btmpBlur, btmpGrayScale)
Word: colordodgeblend

what I'm doing wrong?
I downloaded RSImageProcessingFixed, but any change...
can You help me?
Thank You!

selvamurali · Dec 21, 2012

its can support free hand tool ?

wheretheidivides · Jan 30, 2013

vb1992 said:
I modified your project and it now
Works well

Especially with this order of effects:

Greyscale

Blur

Invert

Blend

Invert

SuperBlur

MultiBlend

thanks, I was having the same errors as everyone else. now to try out the rotate bitmap.

jmon · Jul 20, 2013

is it possible with this library to replace the alpha of an image?

Informatix · Jul 20, 2013

The Accelerated Surface library provides an AlterColors function which is very fast to replace the Alpha channel.

jmon · Jul 20, 2013

Informatix said:
The Accelerated Surface library provides an AlterColors function which is very fast to replace the Alpha channel.

Thanks, I would never have guessed that this library would do something like that from its name!

[Edit]
Seems that it is only possible to modify the alpha value as int, but is there a way to swap the alpha with another image in grey scale?
What I need to do is this: draw a red square, then apply an image of a car in grey scale as the alpha of this red square, so that I get a red car.

Thanks for your help

Informatix · Jul 20, 2013

For this, you should look at the ABExtDrawing library.

chrjak · Feb 1, 2014

nice-but i dont know what zip i should take...

RonC. · May 25, 2014

My values are changing in the Seekbar, but RSIImageFilters doesn't seem to be working in Seekbar1_ValueChanged. Any other suggestions on the code would be great too.

B4X:

Sub Process_Globals
    'These global variables will be declared once when the application starts.
    'These variables can be accessed from all modules.
    Private Timer1 As Timer
End Sub

Sub Globals
    Dim test As Bitmap
    Dim RSIIP As RSImageProcessing
    Dim RSIFilter As RSImageFilters

    Private ImageView1 As ImageView
    Private Label1 As Label
    Private Panel1 As Panel
    Private SeekBar1 As SeekBar
End Sub

Sub Activity_Create(FirstTime As Boolean)
    'Do not forget to load the layout file created with the visual designer. For example:
    'Activity.LoadLayout("Layout1")

    Init
    RSIIP.Initialize

    Activity.AddView(Panel1,0,0,100%x,100%y)
    Panel1.AddView(Label1,5%x,20dip,90%x,20dip)
    Panel1.AddView(SeekBar1,5%x,60dip,90%x,32dip)
    Panel1.AddView(ImageView1,(Activity.Width/2)-50dip,Activity.Height-100dip,100dip,100dip)

    test.Initialize(File.DirAssets, "d30.jpg")
    ImageView1.Bitmap = test
    Timer1.Enabled = True
End Sub

Private Sub Init
    Timer1.Initialize("Timer1", 2000) '
    Panel1.Initialize("Panel1")
    SeekBar1.Initialize("SeekBar1")
    SeekBar1.Max = 30000
    SeekBar1.Value = 0
    Label1.Initialize("Label1")
    ImageView1.Initialize("ImageView1")
    Label1.TextColor = Colors.White
End Sub

Sub SeekBar1_ValueChanged (Value As Int, UserChanged As Boolean)
    Label1.Text = Value
    ImageView1.Bitmap = RSIFilter.HueFilter(test,Value)
End Sub

Sub Timer1_Tick
    SeekBar1.Value = SeekBar1.Value
End Sub

Gsquared · Jun 4, 2014

I was not able to get this library and example to work. It says it is missing the "rssketchpad" library and the example fails to compile. I tried all the zip files provided.

Vincent HURET · Jul 16, 2014

Hi
When I lounch the application in debug..I have an error : missing RSSKETCHPAD then I found the KETCHPAD and have installed it.
Now, I have a problem saying that
IO.Initialize("IO")
is not recognised..

Mayday...somebody has an idea ?

Vincent

Spacewalker · Jul 29, 2014

same here:
rssketchpad missing and IO.Initialize("IO") error...
any idea how to get this lib working (B4A V3.82) ?

Johan Schoeman · Nov 15, 2014

Spacewalker said:
same here:
rssketchpad missing and IO.Initialize("IO") error...
any idea how to get this lib working (B4A V3.82) ?

Is this not perhaps the solution to the IO.Initialize("IO") error?
http://www.b4x.com/android/forum/threads/rsimageprocessing-library.16230/page-3#post-113875

little3399 · Feb 5, 2015

Hi, XverhelstX

I runing the demo project with RSImageProcessingFixed ... and receive a error as flollowing ,,

G-ShadoW · Jun 8, 2015

B4X:

Dim a As Bitmap
    a=LoadBitmapSample(File.DirRootExternal, "1.jpg", 100%x, 100%y)
    ii.Watermark(a, "Testing...", 20,10, Colors.Red, 50,100,True)
    io.writeBitmapToFile(a,File.DirRootExternal,"1.jpg",100)

why there is no watermark?

Devv · Jun 23, 2015

Perfect thanks you !

Fusseldieb · Aug 25, 2015

Absolutely awesome library!!!

LucaMs · Jan 26, 2016

Great library!

Many effects: through which one can I increase/decrease one of the three basic colors without affecting the other two?
ColorBoost? If yes, what its parameter "type" mean?

Thank you

LucaMs · Jan 26, 2016

LucaMs said:
Great library!

Many effects: through which one can I increase/decrease one of the three basic colors without affecting the other two?
ColorBoost? If yes, what its parameter "type" mean?

Thank you

type 1: Red
type 2: Green
type 3: Blue

MaCaveAVin · Mar 16, 2016

Hi,

I just found an issue with colorfilter parameters.

ColorFilter (src As android.graphics.Bitmap, red As Double, green As Double, blue As Double) As android.graphics.Bitmap

ColorFilter(current_bitmap, 0,0,255) : it shows green bitmap
ColorFilter(current_bitmap, 0,255,0) : it shows red bitmap
ColorFilter(current_bitmap, 255,0,0) : it shows nothing

Looks like something is shifted ...

B4A Library RSImageProcessing Library

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