La gestion des couleurs, qu'est-ce que c'est ?
complexity is unnecessary and works against market acceptance
The contrast vs. resolution thread (still yet again) brings back long suppressed memories. In the 1950's, after my obligitory stint in Korea, I spent a couple of years at RCA working on value implementation of commercial television. This simply meant cutting the costs of the TV set enough so that RCA could make sufficient profits to satisfy both Elvis Presley and the stockholders. The design engineers had produced the Model 630 set with 30 tubes that was intended to squeeze every last photon of quality of of the broadcast signal. All aspects of the picture, size, linearity, contrast, grey scale, and resolution could be adjusted. The set cost a fortune to make. If you are my age you will remember that a 19" screen B&W TV in a coffin shaped cabinet sold for over $1000.
Our consumer testing showed that all this complexity was unnecessary and worked against market acceptance. A high tube count meant frequent repair visits for tube burnouts and the many controls meant even more frequent visits when Junior played "space pilot" with the adjustments. The public preferred a bright, high contrast picture. Consumer panels judged brighter more contrasty pictures to be "sharper" and of higher quality than higher resolution pictures with full grey scales. Not much else mattered. The adjustment controls and the quality enhancing circuits beloved by the design engineers could be eliminated without influencing consumer acceptance. Costs tumbled and sales soared. We set the stage for the "vast wasteland" that TV has become.
Now substitute photography for TV. To paraphrase P.T. Barnum, "No manufacturer ever went broke underestimating the taste of the photographic public." I'm sure camera manufacturers (including Leica) and film makers conducted tests similar to those that we ran and/or read the reported results of these tests in the IEEE journals. Except for a few cranks the general public neither wants nor values high resolution large sized photos. The largest selling category of cameras is P&S, soon to be overtaken by digital cheapies, and the modal enlargement size is 4"x6". In my next trip to the Smithsonian Museum I expect to see a Leica M3 in an exhibit case in the Hall of Abandoned Technologies, vying for space alongside that old TV set, a mechanical typewriter, and a slide rule.
Sondage : souhaitez-vous faire de la gestion des couleurs sous OSX ou sous Windows ?
les informations s'afficheront
sur le site www.Club-Photoshop.com
- Adobe Flex
- couleurs du Web
- spamdexing
- search engine optimization
- script.aculo.us
- typosquatting
- agrégateur de contenu
- ferme de liens
- data mining (exploration de données)
- wiki
- URL (uniform resource locator)
- hypertext markup language
- XHTML
- AJAX (Asynchronous JavaScript and XML)
- PHP (Hypertext Preprocessor)
- ASP (Active Server Pages)
- MySQL (Structured Query Language)
- SGBD (système de gestion de base de données)
- DBMS (database management system)
- .htaccess (URL rewriting)
- ColdFusion
- domaineur
- cybersquattage
- feuilles de style en cascade (CSS)
- TCP/IP
- DNS
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- pop-up
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Thierry Dambermont est l'auteur du texte de cette page web
et en reste le détenteur des droits de copyright.
http://www.thierrydambermont.be
Le format de ces videos est mp4
Toutefois les fichiers proposés ici sont compressés en ZIP. Vous devrez les dézipper sur votre ordinateur afin de pour voir les lire avec un logiciel de lecture de videos. Macintosh : Pour dézipper il faut double-cliquer sur l'icône du fichier rapatrié sur le disque dur de votre ordinateur. PC : Pour dézipper un fichier rapatrié sur le disque dur de votre ordinateur il faut cliquer sur l'icône du fichier avec le bouton droit de la souris et dans le menu choisir "décompresser ici".
Faites votre choix parmi les quatre niveaux de qualité
C'est simple, plus le fichier a un poids important, plus sa qualité est élevée. Notez que même les fichiers de la plus basse qualité restent ici d'une qualité tout à fait acceptable.
LOWEST QUALITY : enregistrement 640/384 pixels à une taux de 1 image par seconde, son de qualité basse 16KHz (la voix semble un peu distante, manque un peu de présence).
LOW QUALITY : enregistrement 640/384 pixels à une taux de 5 images par seconde, son de qualité basse 16KHz (la voix semble un peu distante, manque un peu de présence).
HIGH QUALITY : enregistrement 640/384 pixels à une taux de 5 images par seconde, son de qualité haute 44KHz.
HIGHEST QUALITY : enregistrement 853/480 pixels à une taux de 5 images par seconde, son de qualité haute 44KHz.
Remarque : La totalité des cours de 01 à 10 sont également downloadables, en niveau de qualité LOWEST, en un seul fichier ZIP de 650MB, en cliquant sur ce lien… cours-photoshop-CS4-01-a-10-LOWEST.zipcours-1 LOW QUALITY (58Mb)
cours-1 HIGH QUALITY (98Mb)
cours-1 HIGHEST QUALITY (129Mb)
cours-2 LOW QUALITY (75Mb)
cours-2 HIGH QUALITY (115Mb)
cours-2 HIGHEST QUALITY (152Mb)
cours-3a LOW QUALITY (147Mb)
cours-3a HIGH QUALITY (169Mb)
cours-3a HIGHEST QUALITY (261Mb)
cours-3b LOW QUALITY (71Mb)
cours-3b HIGH QUALITY (90Mb)
cours-3b HIGHEST QUALITY (137Mb)
cours-4 LOW QUALITY (96Mb)
cours-4 HIGH QUALITY (139Mb)
cours-4 HIGHEST QUALITY (198Mb)
cours-5 LOW QUALITY (114Mb)
cours-5 HIGH QUALITY (161Mb)
cours-5 HIGHEST QUALITY (233Mb)
cours-6a LOW QUALITY (99Mb)
cours-6a HIGH QUALITY (135Mb)
cours-6a HIGHEST QUALITY (192Mb)
cours-6b LOW QUALITY (97Mb)
cours-6b HIGH QUALITY (129Mb)
cours-6b HIGHEST QUALITY (176Mb)
cours-7a LOW QUALITY (56Mb)
cours-7a HIGH QUALITY (78Mb)
cours-7a HIGHEST QUALITY (116Mb)
cours-7b LOW QUALITY (37Mb)
cours-7b HIGH QUALITY (49Mb)
cours-7b HIGHEST QUALITY (70Mb)
cours-7c LOW QUALITY (33Mb)
cours-7c HIGH QUALITY (44Mb)
cours-7c HIGHEST QUALITY (72Mb)
cours-8a LOW QUALITY (21Mb)
cours-8a HIGH QUALITY (30Mb)
cours-8a HIGHEST QUALITY (46Mb)
cours-8b LOW QUALITY (65Mb)
cours-8b HIGH QUALITY (87Mb)
cours-8b HIGHEST QUALITY (130Mb)
cours-8c LOW QUALITY (31Mb)
cours-8c HIGH QUALITY (41Mb)
cours-8c HIGHEST QUALITY (59Mb)
cours-9a LOW QUALITY (12Mb)
cours-9a HIGH QUALITY (15Mb)
cours-9a HIGHEST QUALITY (23Mb)
cours-9b LOW QUALITY (53Mb)
cours-9b HIGH QUALITY (83Mb)
cours-9b HIGHEST QUALITY (118Mb)
cours-9c LOW QUALITY (26Mb)
cours-9c HIGH QUALITY (37Mb)
cours-9c HIGHEST QUALITY (55Mb)
cours-10a-1 LOW QUALITY (7Mb)
cours-10a-1 HIGH QUALITY (10Mb)
cours-10a-1 HIGHEST QUALITY (14Mb)
cours-10a-2 LOW QUALITY (6Mb)
cours-10a-2 HIGH QUALITY (9Mb)
cours-10a-2 HIGHEST QUALITY (12Mb)
cours-10a-3 LOW QUALITY (16Mb)
cours-10a-3 HIGH QUALITY (24Mb)
cours-10a-3 HIGHEST QUALITY (35Mb)
cours-10b LOW QUALITY (50Mb)
cours-10b HIGH QUALITY (65Mb)
cours-10b HIGHEST QUALITY (96Mb)
cours-10c LOW QUALITY (28Mb)
cours-10c HIGH QUALITY (41Mb)
cours-10c HIGHEST QUALITY (57Mb)
cours-10d LOW QUALITY (30Mb)
cours-10d HIGH QUALITY (44Mb)
cours-10d HIGHEST QUALITY (61Mb)
cours-11a LOW QUALITY (26Mb)
cours-11a HIGH QUALITY (35Mb)
cours-11a HIGHEST QUALITY (58Mb)
cours-11b LOW QUALITY (8Mb)
cours-11b HIGH QUALITY (12Mb)
cours-11b HIGHEST QUALITY (16Mb)
cours-11c LOW QUALITY (22Mb)
cours-11c HIGH QUALITY (32Mb)
cours-11c HIGHEST QUALITY (46Mb)
cours-11d LOW QUALITY (25Mb)
cours-11d HIGH QUALITY (36Mb)
cours-11d HIGHEST QUALITY (50Mb)
cours-11e LOW QUALITY (15Mb)
cours-11e HIGH QUALITY (22Mb)
cours-11e HIGHEST QUALITY (31Mb)
cours-12a LOW QUALITY (15Mb)
cours-12a HIGH QUALITY (22Mb)
cours-12a HIGHEST QUALITY (31Mb)
cours-12b LOW QUALITY (10Mb)
cours-12b HIGH QUALITY (14Mb)
cours-12b HIGHEST QUALITY (22Mb)
cours-12c LOW QUALITY (35Mb)
cours-12c HIGH QUALITY (51Mb)
cours-12c HIGHEST QUALITY (70Mb)
cours-12d LOW QUALITY (28Mb)
cours-12d HIGH QUALITY (41Mb)
cours-12d HIGHEST QUALITY (57Mb)