c# - Blending an image together with a control's background -

-

i'm trying blend image reduced opacity control's background. code i'm using following one: 

colormatrix matrix = new colormatrix(new float[][]{     new float[] {1f, 0, 0, 0, 0},     new float[] {0, 1f, 0, 0, 0},     new float[] {0, 0, 1f, 0, 0},     new float[] {0, 0, 0, opacity, 0}, //opacity in rage [0 1]     new float[] {0, 0, 0, 0, 1f}});  imageattributes imageattributes = new imageattributes(); imageattributes.setcolormatrix(matrix);  g.compositingmode = compositingmode.sourceover; g.compositingquality = compositingquality.highquality; //g comes background painted on it; img bitmap g.drawimage(img, new rectangle(0, 0, img.width, img.height), 0, 0, img.width, img.height, graphicsunit.pixel, imageattributes);

speed performance quality has problems dark images. following 2 images background (left) , foreground(right): enter image description here when using opacity of 0.9 foreground produce output on left here below. same images photoshop , 90% opacity on foreground produce more consistent result (right). enter image description here

am doing wrong or limitation of imageattribute method? if problem method i'm using, can please suggest alternatives still keep in mind performances? possibly, alternative should consider receive background painted on graphics object.

edit make clear, problem @ 90% of opacity dark portions (only those!) of image transparent. if hold color, apply factor opacity value, light colors works (see light bulb) , dark not.

did try compositingquality.gammacorrected? looks me if compositing not gamma corrected.

you may wish experiment imageattributes.setgamma method.


Comments

Post a Comment

Popular posts from this blog

ios - RestKit 0.20 — CoreData: error: Failed to call designated initializer on NSManagedObject class (again) -

-
this error has shown on many times, seems. prominent answer issue seems restkit 0.20 — coredata: error: failed call designated initializer on nsmanagedobject class however, solution posted doesn't work me. let's start beginning: i want upload file server. want parse response make sure uploaded. if not, try again later. model has boolean variable called nsnumber *senttoserver purpose (in coredata, bool saved nsnumber ) . because don't know whether sending going successful, save entity coredata model first before sending via restkit. when post request successful, server returns json string this: {"id":14,"created":true} notice that, of course, id not set on coredata model yet, both id , created new informations model. here's model: @interface recording : nsmanagedobject @property (nonatomic, retain) nsstring * audiofilepath; @property (nonatomic, retain) nsdate * createdat; @property (nonatomic, retain) nsstring * deviceid; @
Read more

laravel - PDOException in Connector.php line 55: SQLSTATE[HY000] [1045] Access denied for user 'root'@'localhost' (using password: YES) -

-
my .env: app_env=local app_debug=true app_key=myappkey app_url=http://localhost db_connection=mysql db_host=localhost db_port=3306 db_database=gestiontaller db_username=root db_password='root' cache_driver=file session_driver=file queue_driver=sync redis_host=127.0.0.1 redis_password=null redis_port=6379 mail_driver=smtp mail_host=mailtrap.io mail_port=2525 mail_username=null mail_password=null mail_encryption=null i've tried password ", ' , without, restarting server every time. i've tried changing localhost 172.0.0.1. yes, password correct, running mysql -u root -p introducing password root in prompt can go mysql. users table: +------------------+-----------+ | user | host | +------------------+-----------+ | debian-sys-maint | localhost | | mysql.sys | localhost | | root | localhost | | root1 | localhost | +------------------+-----------+ i've added homestead.yaml this: database_port: 3306
Read more

java - Digest auth with Spring Security using javaconfig -

-
so i'm trying create digest authentication spring following documentation trying translate xml "requirements" in java requirements. let's have xml in docs: <bean id="digestfilter" class= "org.springframework.security.web.authentication.www.digestauthenticationfilter"> <property name="userdetailsservice" ref="jdbcdaoimpl"/> <property name="authenticationentrypoint" ref="digestentrypoint"/> <property name="usercache" ref="usercache"/> </bean> <bean id="digestentrypoint" class= "org.springframework.security.web.authentication.www.digestauthenticationentrypoint"> <property name="realmname" value="contacts realm via digest authentication"/> <property name="key" value="acegi"/> <property name="noncevalidityseconds" value="10"/> </b
Read more